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Transmission Diagnostic Procedures

1. CAV CIRCUIT FUNCTION 1 2 K51 20DB YL 2 0L AUTOMATIC SHUT DOWN RELAY CONTROL K51 18DB YL 2 4L AUTOMATIC SHUT DOWN RELAY CONTROL TURBO 4 C27 180 2 4L HIGH SPEED RAD FAN RELAY CONTROL TURBO 5 V35 20LG RD 2 0L S C VENT CONTROL 6 C27 20DB PK 2 0L RAD FAN RELAY CONTROL 6 C24 18DB RD 2 4L RAD FAN LOW RELAY CONTROL TURBO 7 V32 20YL RD 2 0L S C SUPPLY 8 106 20WTIDG 2 0L NVLD SOLENOID CONTROL K106 18WT DG 2 4L NVLD SOLENOID CONTROL TURBO 9 10 11 C28 20DB OR 2 0L AIC CLUTCH RELAY CONTROL 11 C28 18DB OR 2 4L AIC CLUTCH RELAY CONTROL TURBO 12 V36 20TN RD 2 0L S C VACUUM CONTROL 13 14 15 16 17 K167 20BR YL 2 0L SENSOR GROUND 2 17 K167 18BR YL 2 4L SENSOR GROUND 2 TURBO 18 19 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 20 K52 20PK BK EVAP PURGE CONTROL 21 1141 20YL RD CLUTCH INTERLOCK SWITCH SIGNAL 22 23 K29 20WT PK BRAKE SWITCH SIGNAL 24 C20 20BR OR 2 0L SWITCH SENSE 24 C20 20BR 2 4L TURBO A C SWITCH SENSE 25 26 T44 20YL LB 2 0L EATX AUTOSTICK DOWNSHIFT SWITCH SIGNAL 26 K119 20LG BK 2 0L MTX CLUTCH UP SWITCH SIGNAL 2 4L TURBO 27 5 20LG LB 2 01 AUTOSTICK UPSHIFT SWITCH SIGNAL 28 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 29 K108 20WT TN EVAP PURGE RETURN 30 10 200 PSP SWITCH SIG
2. POWERTRAIN CONTROL MODULE C2 2 4L TURBO CONNECTOR PINOUTS POWERTRAIN CONTROL MODULE C2 2 4L TURBO GRAY 38 WAY CAV CIRCUIT FUNCTION 1 2 3 4 5 6 7 8 9 K17 16DB TN COIL CONTROL NO 2 10 K19 16BK GY COIL CONTROL NO 1 11 K14 18LB BR INJECTOR CONTROL NO 4 12 K13 18YL WT INJECTOR CONTROL NO 3 13 K12 18 INJECTOR CONTROL NO 2 14 11 18WT DB INJECTOR CONTROL NO 1 15 16 17 K199 18BR VT 02 1 2 HEATER CONTROL 18 K99 18BR OR 02 1 1 HEATER CONTROL 19 K20 18DG GEN FIELD CONTROL 20 K2 20TN BK ECT SIGNAL 21 K22 200R DB TP SIGNAL 22 23 K1 20DG RD MAP SIGNAL 24 K45 20BK VT KS RETURN 25 K42 20DB LG KS SIGNAL 26 27 K4 18BK LB SENSOR GROUND 28 K961 18BR VT IAC RETURN 29 K7 180R 5 VOLT SUPPLY 30 K21 20BK RD IAT SIGNAL 31 K41 20BK DG 02 1 1 SIGNAL 32 904 18DB DG 02 RETURN 33 141 20TN WT 02 1 2 SIGNAL 34 K44 20TN YL CMP SIGNAL 35 24 20GY BK CKP SIGNAL 36 37 38 K610 18VT GY IAC MOTOR CONTROL 193 N N E R 4 2 N N E R 2 CONNECTOR PINOUTS POWERT CONTROL MODULE POWERTRAIN CONTROL MODULE WHITE 38 WAY
3. a AUTOSTICK SWITCH NATURAL 4 WAY 1 CAV CIRCUIT FUNCTION 1 1744 20YL LB AUTOSTICK DOWNSHIFT SWITCH SIGNAL 4 O oe ae 1 2 75 20LG LB AUTOSTICK UPSHIFT SWITCH SIGNAL AUTOSTICK 3 21 20BK GROUND SWITCH 4 11 20RD WT IGNITION SWITCH OUTPUT OFF RUN START DATA LINK CONNECTOR WHITE 16 WAY CAV CIRCUIT FUNCTION 1 2 025 20VT YL PCI BUS PCM _ 3 P WHITE 4 712 20BK TN GROUND fr 5 1212 20BK TN GROUND 6 8 1 7 1024 20PK SCI TRANSMIT PCM 8 DATA 9 106 20PK LB 2 0L SCI RECEIVE TCM LINK W N 12 020 2016 SCI RECEIVE PCM 13 14 15 015 20WT DG 2 0L SCI TRANSMIT TCM T 16 A14 18RD WT FUSED B U T 5 183 CONNECTOR PINOUTS FUSE BLOCK N N NOT USED DRL LO DRL HIGH RELAY RELAY 2 J 3 N 3
4. 188 LEFT BACKUP LAMP BLACK 2 188 OUTPUT SPEED SENSOR GRAY 2 188 FUSES PING 190 TRANSMISSION CONTROL 2 190 POWERTRAIN CONTROL MODULE C1 BLACK 38 191 POWERTRAIN CONTROL MODULE C2 2 01 ORANGE 38 192 POWERTRAIN CONTROL MODULE C2 2 4L TURBO GRAY 38 193 POWERTRAIN CONTROL MODULE WHITE 38 194 POWERTRAIN CONTROL MODULE C4 GREEN 38 195 RIGHT BACKUP LAMP BLACK 2 195 THROTTLE POSITION SENSOR 2 0L BLACK 196 THROTTLE POSITION SENSOR 2 4L TURBO NATURAL 3 WAY 196 TRANSMISSION RANGE SENSOR DK GRAY 10 196 TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY BLACK 8 WAY 196 SCHEMATIC 8 197 TABLE OF CONTENTS Continued 2 2 52 2 225 442 4 24 4 4 199 11 1 TRANSMISSION RANGE SENSOR 199 11 2 PRESSURE SWITCH ren onenean a meee eke ieee ee 199 11 3 SOLENOID APPLICATION CHART rene ee stone geek teen ee ae be eee 200
5. z BREAKER 1 4 43 42 4 1 186 CONNECTOR PINOUTS FUSES FB RHD FUSE AMPS FUSED CIRCUIT FUNCTION NO 1 16 20RD WT FUSED IGNITION SWITCH OUTPUT RUN ACC 1 16 20RD WT FUSED IGNITION SWITCH OUTPUT RUN ACC 2 20 V6 16DB FUSED IGNITION SWITCH OUTPUT RUN ACC 2 20 V6 16DB FUSED IGNITION SWITCH OUTPUT RUN ACC 20A F10 18YL RD FUSED IGNITION SWITCH OUTPUT RUN ACC 20A X12 18RD WT FUSED IGNITION SWITCH OUTPUT RUN ACC 4 15A 18PK FUSED B 5 15a 13 14RD OR DIMMER SWITCH HIGH BEAM OUTPUT 6 10 F20 20WT FUSED IGNITION SWITCH OUTPUT RUN 7 20A C1 1406 FUSED IGNITION SWITCH OUTPUT RUN 10A F25 20TN LG FUSED IGNITION SWITCH OUTPUT RUN 9 10 A81 20DG RD AUTOSTICK FUSED B 10 10A G5 20DB WT FUSED IGNITION SWITCH OUTPUT RUN START 11 15A F12 18DB PK FUSED IGNITION SWITCH OUTPUT RUN START 12 10A F15 20DG WT FUSED IGNITION SWITCH OUTPUT RUN START 13 20A A120 16RD LG FUSED B 14 20A F35 18RD FUSED B 15 15A F33 18PK RD FUSED B 16 25A F3 12LB OR FUSED B 17 10A 143 14 FUSED LEFT LOW BEAM OUTPUT 18 10A 144 14VT RD FUSED RIGHT LOW BEAM OUTPUT 19 N 20 10 C16 20LB YL FUSED REAR WINDOW DEFOGGER SWITCH OUTPUT N 20 10 C16 20LB YL FUSED REAR WINDOW DEFOGGER
6. ds 120 P0884 POWER UP Al SPEED dered eee ease ee eH 124 P0888 RELAY OUTPUT ALWAYS gt 55 2 5525855 125 P0890 SWITCHED BATTERY 130 P0891 TRANSMISSION RLY ALWAYS 133 P0897 WORN OUT BURNT TRANSAXLE 136 P0944 LOSS PRIME pia eRe ee 138 P0952 AUTOSTICK INPUT CIRCUIT LOW 141 0992 2 4 00 HYDRAULIC PRESSURE TEST 1 144 P1652 SERIAL COMMUNICATION LINK MALFUNCTION 146 P1684 BATTERY WAS 5 148 P1687 NO COMMUNICATION WITH THE 151 8 0 9 0 10 0 TABLE OF CONTENTS Continued P1694 BUS COMMUNICATION WITH ENGINE 153 P1775 SOLENOID SWITCH VALVE LATCHED IN TCC POSITION 154 P1776 SOLENOID SWITCH VALVE LATCHED IN LR 158 P1790 FAULT IMMEDIATELY AFTER SHIFT 162 P1793 TRD LINK COMMUNICATION 163 P1794 SPEED SENSOR GROUND ERROR 164 P1797 MANUAL SHIFT 166 BACKUP LAMPS COME ON
7. RATIO ERROR IN 1ST Continued ACTION APPLICABILITY With the DRBIII read Transmission If any of these DTC s are present perform their respective tests first Are there any Loss of Prime Line Pressure Sensor and or Speed Sensor DTCs present Yes Refer to appropriate symptom the Transmission category If any of these are present they will cause a gear ratio error Perform the test for Loss of Prime first if it is present Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII perform the 1st gear clutch test Follow the instructions on the DRBIII Increase the throttle angle or TPS Degree to 30 for no more than a few seconds CAUTION Do not overheat the transmission Did the Clutch Test pass Input Speed remain at zero Yes GoTo 4 GoTo 5 The conditions to set this DTC are not current at this time All Check the gearshift linkage adjustment Gear ratio DTC s can be set by problems in the Input and Output Speed Sensor circuits f the vehicle passes the Clutch Test and still sets Gear Ratio DTC check the Speed Sensors for proper operation Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Check the wiring and connectors for the Speed Sensors for a good connection then perform a wiggle test using the Transmission Simulator Miller
8. APPLICABILITY Turn the ignition off to the lock position All Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Disconnect the PCM C4 harness connector Remove the Starter Relay Using a 12 volt test light connected to ground check all three Transmission Control Relay Output circuits in the appropriate terminals of special tool 8815 NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly on all three output circuits Yes Repair the Transmission Control Relay Output circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 10 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN AND REPRO
9. All If any of these DTC s are present perform their respective tests first Are there any Loss of Prime Line Pressure Sensor and or Speed Sensor DTCs present Yes Refer to the Transmission category and perform the appropriate symptom any of these DTC s are present they will cause a gear ratio error Perform the test for Loss of Prime first if it is present Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBII1I perform the Reverse Gear Clutch test Follow the instructions on the DRBIII Increase the throttle angle or TPS Degree to 30 for no more than a few seconds CAUTION Do not overheat the transmission Did the dutch test pass Input Speed remain at zero Yes GoTo 4 GoTo 5 The conditions to set this DTC are not current at this time Check the gearshift linkage adjustment Gear ratio DTC s can be set by problems in the Input and Output Speed Sensor circuits If the vehicle passes the clutch test and still sets gear ratio 5 check the Speed Sensors for proper operation Remove the Starter Relay With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Check the Speed Sensor wiring and connectors for good connection then perform a wiggle test using the Transmission Simulator Miller tool 8333 and Electronic Transmission Adapter kit Miller tool 8333 1 This DTC can also be set under extreme temp
10. prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 56 TRANSMISSION NGC P0713 TRANSMISSION TEMPERATURE SENSOR HIGH Continued APPLICABILITY With the DRBIII check Transmission Are there any Speed Sensor DTCs present Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P0713 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 GoTo 9 Voltage switch to all t
11. GoTo 3 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the AutoStick Switch harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Upshift Sense circuit between the Pinout Box and the AutoStick Switch harness connector 15 the resistance above 5 0 ohms Yes Repair the AutoStick Upshift Sense circuit for an open GoTo 4 173 TRANSMISSION NGC NO MANUAL AUTOSTICK OPERATION Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the AutoStick Switch harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Downshift Sense circuit between the Pinout Box and the AutoStick Switch harness connector 15 the resistance above 5 0 ohms Yes Repair the AutoStick Downshift Sense circuit for an open No GoTo 5 Ignition on engine not running With the D
12. 161 TRANSMISSION NGC Symptom P1790 FAULT IMMEDIATELY AFTER SHIFT E When Monitored and Set Condition P1790 FAULT IMMEDIATELY AFTER SHIFT When Monitored After a speed ratio error is stored Set Condition This DTC is set if the associated speed ratio DTC is stored within 1 3 seconds after a shift POSSIBLE CAUSES FAULT AFTER SHIFT APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine s
13. GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Replace Transmission Solenoid TRS assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM C4 harness connector Disconnect the Transmission Solenoid TRS Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the Transmission Temperature Sensor Signal circuit 15 the resistance below 5 0 ohms Yes Repair the Transmission Temperature Sensor Signal circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 7 54 TRANSMISSION NGC 0712 5 155 TEMPERATURE SENSOR LOW Continued APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service I nforma tion WITH THE DRBIII PERFORM QUICK LEARN Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The
14. 5 4 2 3 4 1 1 2 X 40 39 38 37 E FUSE FUSE FUSE FUSE 20 19 18 17 20 19 ee eee T R 36 35 34 33 FUSE FUSE FUSE FUSE 16 15 14 13 5 22 22 2 22 4 T 32 31 30 28 FUSE FUSE FUSE FUSE T GRAY 12 10 9 5 12 86 28 27 26 25 FUSE FUSE FUSE FUSE 8 7 6 5 8 Sa 24 23 22 21 FUSE FUSE FUSE FUSE 4 3 2 1 2 CIRCUIT CIRCUIT BREAKER 2 y _ 2 BREAKER 1 44 43 42 4 _ _ 184 CONNECTOR PINOUTS FUSES FB LHD FUSE AMPS FUSED CIRCUIT FUNCTION NO 1 16 20RD WT FUSED IGNITION SWITCH OUTPUT RUN ACC 1 16 20RD WT FUSED IGNITION SWITCH OUTPUT RUN ACC 20A V6 16DB FUSED IGNITION SWITCH OUTPUT RUN ACC 20A V6 16DB FUSED IGNITION SWITCH OUTPUT RUN ACC 20A X12 18RD WT FUSED IGNITION SWITCH OUTPUT RUN ACC 20A F10 18YL RD FUSED IGNITION SWITCH OUTPUT RUN ACC 15A 18PK FUSED B 10A F25 20TN LG FUSED IGNITION SWITCH OUTPUT RUN 20A 1406 FUSED IGNITION SWITCH OUTPUT RUN 10A F20 20WT FUSED IGNITION SWITCH OUTPUT RUN 10A F20 20WT DAYTIME RUNNING LAMPS FUSED IGNITION SWITCH OUTPUT RUN 15A 13 14RD OR DIMMER SWITCH HIGH BEAM OUTPUT 10A F15 20DG WT FUSED IGNITION SWITCH OUTPUT
15. 60 TRANSMISSION NGC P0O714 TRANSMISSION TEMPERATURE SENSOR INTERMITTENT Continued ACTION APPLICABILITY With the DRBIII Check the STARTS SINCE SET counter for P0714 All NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 No GoTo 7 Turn the ignition off to the lock position Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the Input Output switch to OFF With the DRBIII monitor the TRANS TEMP VOLTS while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator Compare the DRBIII readings with the numbers listed on the Transmission Simulator Do the readings the Transmission Simulator match non fluctuating 2 reading 0 2 volts Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Replace Transmission Solenoid TRS assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all pow
16. Yes Repair the LR Solenoid Control circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect jumper wire between the used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Using a 12 volt test light connected to ground check the Transmission Relay Output circuit in the Transmission Solenoid Pressure Switch harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 10 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 89 TRANSMISSION NGC P0750 LR SOLENOID CIRCUIT Continued ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service nforma tion WITH THE DRBIII PERFORM QUICK LEARN AND
17. prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 With the DRBIII check Engine 5 this includes all one trip failures Are there any Engine TPS DTCs present Yes Refer to the Powertrain category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 33 TRANSMISSION NGC P0O124 THROTTLE POSITION SENSOR APPS INTERMITTENT Continued ACTION APPLICABILITY With the DRBII1 record the EATX EVENT DATA to help identify the conditions which the DTC was set With the DRBIII erase Transmission DTCs NOTE To erase EATX EVENT DATA information
18. BATTERY DISCONNECT must be performed Performing a BATTERY DISCONNECT will reset all learned Transmission values to controller defaults which may lead to erratic shift schedules Drive the vehicle and try to duplicate the conditions in which the DTC was reported by the EATX EVENT DATA With the DRBIII read Transmission DTCs Did the DTC P0124 THROTTLE POSITION SENSOR INTERMITTENT reset Yes GoTo 4 GoTo 6 Ignition On Engine Not Running All With the DRBIII under Transmission Sensors monitor the TPS voltage in the following step Slowly open and close the throttle while checking for erratic voltage changes Did the TPS voltage change smooth and consistent Yes GoTo 5 No Replace the Throttle Position Sensor per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 NOTE Due to the integration of the Powertrain and Transmission Control Modules communication between the modules is internal Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service I nforma tion WITH THE DRBIII PERFORM QUICK LEARN Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set this DTC are not present at this time Using the schematics as a guide inspect
19. Is the resistance below 5 0 ohms Yes GoTo 3 No Repair the P N Position Switch Sense circuit for an open Turn the ignition off to the lock position Disconnect the PCM harness connectors Disconnect the TRS harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the P N Position Switch Sense circuit 15 the resistance above 100 kohms Yes GoTo 4 No Repair theP N Position Switch Sense circuit for a short to ground 171 TRANSMISSION NGC CHECKING PARK NEUTRAL SWITCH OPERATION Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connectors Move the Gear selector through all gear positions from Park to 1st and back While moving the gear selector through each gear measure the resistance between ground and the P N Position Switch Sense circuit in the appropriate terminal of special tool 8815 CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Did the resistance change from above 10 0 ohms to below 10 0 ohms
20. Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 7 The conditions necessary to set this DTC are not present at this time All Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 139 TRANSMISSION NGC P0944 LOSS OF PRIME Continued APPLICABILITY If there no possible causes remaining view repair All Repair Replace the Transmission Oil Pump per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 140 TRANSMISSION NGC Symptom P0952 AUTOSTICK INPUT CIRCUIT LOW When Monitored and Set Condition P0952 AUTOSTICK INPUT CIRCUIT LOW When Monitored Whenever the engine is running Set Condition The transmission is not in the Autostick position and the upshift or downshift is reporting closed below 0 3 volts or if both switches are reported closed at the same time POSSIBLE CAUSES AUTOSTICK SWITCH AUTOSTICK DOWNSHIFT SENSE CIRCUIT SHORT TO GROUND AUTOSTICK UPSHIFT SENSE CIRCUIT SHORT TO GROUND POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY With the D
21. Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for P0706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 102 TRANSMISSION NGC P0841 LR PRESSURE SWITCH SENSE CIRCUIT Continued APPLICABILITY With the DRBIII read Transmission DTC s Are there any Transmission Control Relay DTC s present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII check for other Transmission 5 Is the DTC P0944 present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 4 With the DRBIII Check the STARTS SINCE SET counter for P0841 All NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 5 No GoTo 12 Turn the ignition off to the lock positio
22. Yes GoTo 5 No Transmission Range Sensor per the Service Informa tion Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits there no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service nforma tion 172 TRANSMISSION NGC Symptom NO MANUAL AUTOSTICK OPERATION POSSIBLE CAUSES AUTOSTICK DOWNSHIFT SENSE CIRCUIT OPEN AUTOSTICK GROUND CIRCUIT OPEN AUTOSTICK UPSHIFT SENSE CIRCUIT OPEN FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN PCM AUTOSTICK ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the AutoStick Switch harness connector Note Check connectors Clean repair as necessary Ignition on engine not running Measure the voltage of the Fused Ignition Switch Output circuit in the AutoStick Switch harness connector Is the voltage above 10 0 volts Yes GoTo 2 No Repair the Fused Ignition Switch Output circuit for an open Turn the ignition off to the lock position Disconnect the AutoStick Switch harness connector Note Check connectors Clean repair as necessary Measure the resistance between ground and the AutoStick Ground circuit at the AutoStick harness connector 15 the resistance above 5 0 ohms Yes Repair the AutoStick Ground circuit for an open
23. position while the vehicle was moving at speeds above 32 Km h 20 MPH If someone shifts to Neutral and cycles the ignition key and quickly shifts to Drive while moving before the PCM comes out of its START ROUTINE the DTC can beset Therefore it is critical that this DTC diagnosis repair procedure should only be used if the vehicleis experiencing intermittent 2nd gear operation and subsequently a return to nor mal operation during normal driving Transmission effects No Limp in condition The DTC is for information only when trying to diag nosis intermittent 2nd gear operation and subse quently a return to normal operation Possible causes NoProblem if vehicle is started in neutral at speeds above 32 Km H 20 MPH and shifted quickly to Drive before PCM comes out of the START ROUTINE FOR INTERMITTENT 2ND GEAR OPERA TION AND THEN A SUBSEQUENT RETURN TO NORMAL OPERATION WITHOUT CLING THE IGNITION KEY Intermittent Direct Battery connection be tween PCM and battery Intermittent Fused Ignition Switch Output between PCM and ignition switch Intermittent Ground to PCM Name of code P1687 77 No Communication with the MIC When monitored Continuously with key on Set condition If no bus messages are re ceived from the Mechanical Instrument Cluster MIC for 25 seconds Theory of operation The PCM communicates with the MIC usingthePCl bus It relies on certain information to func
24. 11 4 SHIFT LEVER ERROR 2 seas 200 11 5 TRANSMISSION TEMPERATURE SENSOR 201 1 0 INTRODUCTION IMPORTANT The 2004 model year PL vehicles will inte grate the Transmission Control Module and Powertrain Control Module into a single con trol module This new module is called the Next Generation Controller NGC for DaimlerChrysler and will be referred to as the Powertrain Control Module PCM The Transmission Control System is part of the Powertrain Control Module The PCM will have four color coded connec tors 1 through C4 C1 BLK C2 GRAY C3 WHITE C4 GREEN each PCM connector will have 38 pins each Two tools are used for probing and repairing the PCM connectors A tool to release the pins from the PCM connec tors Miller Tool 3638 you must use the Miller Tool 3638 tool to release the connector pins or harness and connector damage will occur Also a tool for probing connectors Miller Tool 8815 you must use the Miller tool 8815 tool to probe the PCM pins or harness and connec tor damage will occur The procedures contained in this manual include all the specifications instructions and graphics needed to diagnose 40 41TE Electronic Automatic Transaxle problems The diagnostics in this manual are based on the failure condition or symp tom being present at time of diagnosis When repairs are required refer to the appropri ate volume of the service
25. Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between F used B circuit and the Transmission Control Relay Output circuit Ignition on engine not running Using a 12 volt test light connected to ground check both Transmission Control Relay Output circuits in the appropriate terminal of special tool 8815 NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 7 No Repair the Transmission Control Relay Output circuit for an open or high resistance Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 39 TRANSMISSION NGC P0562 LOW BATTERY VOLTAGE Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Install a substitute Relay in place of the Transmission Control Relay Start the engine Using a voltmeter measure the battery voltage With the DRBIII monitor the Transmission Switched Battery Voltage Compare the Transmission Switched Battery voltage to the actual battery voltage Is the DRBIII voltage within 2 0 volts of the bat
26. NOTE Strenuous driving conditions may cause the vehicle to overheat If the driver operates in or initiates AutoStick with an overheated vehicle the code will be set Name of code 0897 73 Worn Out Burnt Trans axle Fluid When monitored At every Fully Electronically Modulated Converter Clutch FEMCC to Partial Electronically Modulated Converter Clutch PEMCC transition miles when A C compressor clutch is being cycled Set condition The code will be set if vehicle shudder is detected 20 times when theA C clutch is cycled Theory of operation Whilein 3rd or 4th FEMCC and just before the A C clutch engages the Power train Control Module PCM requests the Trans mission Control System to momentarily establish PEMCC operation If vehicle shudder is detected during the FEMCC to PEMCC transition a counter is incremented If the count reaches 20 the trouble code is set The driver may then notice harsh bumps when the A C clutch is being cycled but vehicle shudder will be eliminated After 35 OBDII EURO STAGE III OBD warm up cycles or if the code is cleared PEMCC will be reactivated to see if shudder is still present If one shudder event occurs the code will be reset Clearing the code and running battery disconnect with the DRBIII is the only way to reset the shudder counter from 20 back to zero Transmission Effects This code does not cause the transmission to go into Limp in mode How ever once the code is set F
27. PRNDL as least three times pausing momentarily in each gear NOTE If all the PRNDL lights box individually then the error was cleared Shift into park and turn the ignition off to the lock position Ignition on engine not running With the DRBIII read Transmission DTCs Does the DTC P0706 reset or do all the PRNDL indicators remain boxed in park or neutral Yes GoTo 3 No GoTo 21 With the DRBIII perform the Shift Lever Position Test Select the test outcome from the following Test passes GoTo 21 Test fails with DTC GoTo 4 Test fails without DTC GoTo 20 43 TRANSMISSION NGC 706 SHIFTER SIGNAL Continued APPLICABILITY Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the DRBIII perform the Shift Lever Position Test When the DRBIII instructs you to put the Gear Selector in a particular position you must do so using the Transmission Simulator The LED for the gear position in question must be illuminated on the Transmission Simulator prior to pressing the ENTER key on the DRBIII Did the Shift Lever Position Test pass Yes GoTo 5 GoTo 6 NOTE After co
28. Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 108 TRANSMISSION NGC P0845 2 4 HYDRAULIC PRESSURE TEST FAILURE Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the 2 4 Pressure Switch Sense circuit Is the resistance below 5 0 ohms Yes Repair the 2 4 Pressure Switch Sensecircuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL
29. Short to voltage gt PCM connector problems gt PCM Name of code P0888 15 Relay Output Always Off When monitored Continuously Set condition This code is set when less than 3 volts are present at the Transmission Control Re lay Output switched battery terminals at the PCM when the PCM is energizing the relay Theory of operation The transmission control relay is used to supply power to the solenoid pack when the transmission is in normal operating mode When the relay is off no power is supplied to the solenoid pack and the transmission is in Limp in mode The relay output is fed back to the PCM It is referred to as the Transmission Control Relay Output circuit or switched battery After a controller reset ignition key turned to the run position or after cranking engine the controller energizes the relay Prior to this the PCM verifies that the contacts are open by check ing for no voltage at the switched battery termi nals After the relay is energized the PCM moni tors the terminals to verify that the voltage is greater than 3 volts Transmission Effects The MIL illuminates and the transmission system defaults to Limp in mode Possible causes gt Relay failure intermittent relay function caused by oxidized or contaminated relay contacts gt Short to ground or open circuit in the Trans mission Control Relay circuit s gt PCM connector problem gt PCM Name of code P0725 18 Engine Speed S
30. The throttle signal is checked for out of range as well as intermittency excessive signal changes The engine controller transmits the throttle value via the Dual Port RAM Most engine controllers can synthesize the throttle value if the throttle position sensor signal is lost If a throttle error is detected by thetransmission controller and the throttle value is available via the Dual Port RAM the Dual Port RAM throttle value will be used and normal operation will continue however a throttle fault code will be set a throttle error is detected and the throttle value is not available via the Dual Port RAM normal operation will be discontinued a throttle fault code will be set and the MIL will be turned on after 5 min of substi tuted operation Transmission E ffects If throttle value available via the Dual Port RAM No effect If throttle value not available via the Dual Port RAM A default throttle value is used Torque converter lock up inhibited 4th gear inhibited Limited shift schedule MIL on after 5 min of substituted operation Possible causes gt Wiring problem gt TPS gt PCM Name of code P0870 31 OD Hydraulic Pres sure Test Failure 0845 32 2 4 Hydraulic Pressure Test Failure 0992 33 2 4 OD Hydraulic Pressure Test Failure When monitored In 1st 2nd or 3rd gear with engine speed above 1000 RPM shortly after a shift and every minute thereafter Set condition mmediat
31. readings 0 2 volts Yes GoTo 5 GoTo 6 If there are no possible causes remaining view repair Repair Replace Transmission Solenoid TRS assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 51 TRANSMISSION NGC PO711 TRANSMISSION TEMPERATURE SENSOR PERFORMANCE Continued ACTION APPLICABILITY The conditions necessary to set this DTC are not present at this time All Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBII1 check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 52 TRANSMISSION NGC Symptom P0O712 TRANSMISSION TEMPERATURE SENSOR LOW When Monitored and Set Condition P0712 TRANSMISSION TEMPERATURE SENSOR LOW When Monitored Continuously with the ignition on and engine r
32. reset Yes GoTo 4 GoTo 5 NOTE Due to the integration of the Powertrain and Transmission Control Modules bus communication between the modules is internal Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set this DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits Pay particular attention to the TPS signal and sensor ground circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 30 TRANSMISSION NGC Symptom 123 POSITION SENSOR APPS HIGH MMMM When Monitored and Set Condition P0123 THROTTLE POSITION SENSOR APPS HIGH When Monitored Continuously with the ignition on and engine running Set Condition This DTC will set if the monitored TPS voltage rises above 4 94 volts for the period of 0 48 s
33. 120 TRANSMISSION NGC P0871 OD PRESSURE SWITCH SENSE CIRCUIT Continued ACTION APPLICABILITY With the DRBIII read Transmission DTC s Are there any Transmission Control Relay DTC s present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P0871 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 No GoTo 11 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the Pressure Switch selector to OD With the DRBIII monitor the OD Pressure Switch state while pressing Pressure Switch test button Did the OD Pressure Switch state change while pressing the Pressure Switch test button Yes GoTo 5 No GoTo 6 there no possible causes remaining view repair Repair Replace the Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ig
34. 129 TRANSMISSION NGC Symptom PO890 SWITCHED BATTERY When Monitored and Set Condition P0890 SWITCHE D BATTERY When Monitored When the ignition is turned from the off position to the run position and or the ignition is turned from the crank position to the run position Set Condition This DTC is set if the Transmission Control Module TCM senses voltage on any of the pressure switch inputs prior to the TCM energizing the relay Note Due to the integration of the Powertrain and Transmission Control Modules the transmission part of the PCM has its own specific power and ground circuits POSSIBLE CAUSES 2 4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE L R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiri
35. 15 the resistance below 5 0 ohms Yes Repair the TRS T3 Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 12 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running Measure the voltage of the TRS T3 Sense circuit 15 the voltage above 0 5 volt Yes Repair the TRS T3 Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 19 46 TRANSMISSION NGC 706 SHIFTER SIGNAL Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPEC
36. 2 3 2 2 1 kickdown shifts are prevented gt Warm Oil temperature at start up above 2 2 36 F and below 27 36 F gt Goes to a Hot schedule above 27 C 80 F oil temperature gt Normal operation upshifts kickdowns and coastdowns gt Hot Oil temperature at start up above 27 C 80 F gt Goes to a Overheat schedule above 115 C 240 F oil temperature gt Normal operation upshifts kickdowns and coastdowns gt Full No PEMCC except to engage FEMCC except at closed throttle at speeds above 113 133 Km h 70 83 MPH Overheat Oil temperature above 115 C 240 F or engine coolant temperature above 115C 240 F gt Goes to a Hot below 110 C 230 F oil temper ature or a Super Overheat above 135 C 275 F oil temperature gt Delayed 2 3 upshift 40 51 Km h 25 32 MPH gt Delayed 3 4 upshift 66 77 Km h 41 48 MPH gt 2nd gear PEMCC above 35 KM h 22 MPH gt Above 35 Km h 22 MPH thetorque converter will not unlock unless the throttle is closed i e at 80 Km h 50 MPH a 4th FEMCC to 3rd FEMCC shift will be made during a part throttle kickdown or a 4th FEMCC to 2nd PEMCC shift will be made at wide open throttle or if a wide open throttle 2nd PEMCC to 1 kickdown is made gt 3rd gear FEMCC from 48 77 Km h 30 48 MPH gt 3rd gear PEMCC from 43 50 Km h 27 31 MPH gt DTC P0218 is set Super Overheat Oil temperature abov
37. 3rd or 4th gear the torque converter clutch TCC can be locked when certain conditions are met The TCC piston is electronically modulated by increasing the duty cycle of the LR TCC solenoid until the torque converter slip difference difference be tween engine and turbine speed is within 60 RPM Then the LR TCC solenoid is fully energized FEMCC 100 duty cycle Torque converter slip is monitored in FEMCC to ensure adequate clutch capacity Transmission Effects EMCC will still be avail able after code is set MIL will illuminate after 5 minutes of accumulated slip FEMCC Thetrans mission will attempt normal operation not in Limp in even after the MIL is illuminated Possible causes gt Worn pump bushing and or failed torque con verter both should be replaced during a rebuild with code 740 38 present gt Solenoid Pressure Switch assembly Name of code P0750 41 LR Solenoid Circuit 0755 42 2 4 Solenoid Circuit 760 43 OD Solenoid Circuit P0765 44 UD Solenoid Circuit When monitored gnition key is turned from off position to run position and or ignition key is turned from crank position to run position then every 10 seconds thereafter or when a gear ratio or pressure switch error DTC is detected Set condition All four solenoids are tested for continuity continuously immediately upon start up and during vehicle operation For solenoids that are currently energized power is momentaril
38. CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the L R Pressure Switch Sense circuit 15 the resistance below 5 0 ohms Yes Repair the L R Pressure Switch Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the L R Pressure Switch Sense circuit 15 the voltage above 0 5 volts Yes Repair the L R Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 156 TRANSMISSION NGC P1775 SOLENOID SWITCH VALVE LATCHED IN TCC POSITION Continued
39. Each shift lever position has a certain combination of switches which will be open and closed this is called a PRNDL code There are 4 switches there fore there are many possible combinations of open and closed switches codes However there are only 9 valid codes 8 for AutoStick one for each gear position and three recognized between gear codes The remainder of the codes should never occur these are called invalid codes The following chart shows the normal switch states for each shift lever position 41TE TRANSMISSION RANGE SENSOR STATES TRS PARK TI 2 NEUTRAL T2 DIAS L T1 C4 OPEN CLOSED CLOSED CLOSED CLOSED CLOSED OPEN CLOSED CLOSED T3 3 CLOSED CLOSED OPEN OPEN OPEN OPEN OPEN CLOSED CLOSED CLOSED CLOSED T4 C1 CLOSED OPEN OPEN CLOSED OPEN OPEN OPEN OPEN OPEN OPEN T42 C2 CLOSED CLOSED CLOSED CLOSED CLOSED CLOSED OPEN OPEN OPEN OPEN CLOSED The following are DRBIII reported Shift Le ver Error codes chart SHIFT LEVER ERROR CODES REPORTED BY THE DRBIII OPEN OPEN 4 STUCK CLOSED s 25 0 T24 C2 STUCK CLOSED 41 1 STUCK 41 1 STUCK CLOSED 80ccf2de Transmission Effects and possible ca
40. INTERMITTENT GEAR RATIO ERRORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 80 TRANSMISSION NGC 734 RATIO ERROR IN 4TH Continued ACTION APPLICABILITY With the DRBIII read Transmission If any of these DTC s are pres
41. Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the 2 4 Solenoid Control circuit 15 the voltage above 0 5 volts Yes Repair the 2 4 Solenoid Control circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit in the Solenoid Pressure Switch Assembly harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 10 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 93 TRANSMISSION NGC 755 2 4 SOLENOID CIRCUIT Continued ACTION AP
42. P0760 OD SOLENOID CIRCUIT Continued ACTION APPLICABILITY With the DRBIII read Transmission DTC s Are there any Transmission Control Relay DTC s present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P0760 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter set at 0 Yes GoTo 4 No GoTo 11 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the Transmission Simulator monitor the OD Solenoid LED With the DRBIII actuate the OD Solenoid Did the OD Solenoid LED on the Transmission Simulator blink on and off during actuation Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Replace the Transmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector
43. PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND TRANSMISSION RELAY OUTPUT CIRCUIT OPEN OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE OD PRESSURE SWITCH POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2
44. Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 165 TRANSMISSION NGC Symptom P1797 MANUAL SHIFT OVERHEAT When Monitored and Set Condition P1797 MANUAL SHIFT OVERHEAT When Monitored Whenever the engine is running and transmission is theAutoStick mode Set Condition If the Engine Temperature exceeds 123 or 255 or the Transmission Temperature exceeds 135 C or 275 F whilein AutoStick mode Note Aggressive driving or driving in low for extended periods of time in AutoStick mode will set this DTC POSSIBLE CAUSES MANUAL SHIFT OVERHEAT ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s M
45. Pressure Switch selector switch to 2 4 With the DRBIII monitor the UD Pressure Switch state while pressing the Pressure Switch Test button on the Transmission Simulator Wiggle the wires leading tothe PCM while pressing and holding the Pressure Switch Test button Did the 2 4 Pressure Switch state change to closed and remain closed while wiggling the wires Yes GoTo 6 GoTo 7 If there are no possible causes remaining view repair Repair Disassemble and inspect the Valve Body per the Service I nforma tion and repair or replace as necessary f no problems are found in the Valve Body replace the Transmission Solenoid Pressure Switch Assembly Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector NOTE Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the 2 4 Pressure Switch Sense circuit from the appropriate terminal of special tool 8815 to the Transmission Solenoid Pressure Switch Assem bly harness connector 15 the resistance above 5 0 ohms Yes Repair the 2 4 Pressure Switch Sense circuit for an open
46. RUN START 15A 12 18DB PK FUSED IGNITION SWITCH OUTPUT RUN START 10A G5 20DB WT FUSED IGNITION SWITCH OUTPUT RUN START 10A A81 20DG RD AUTOSTICK FUSED B 20A F35 18RD FUSED B 15A F33 18PK RD FUSED B 25A 12LB OR FUSED B 10A 143 14VT FUSED LEFT LOW BEAM OUTPUT 10A 144 14VT RD FUSED RIGHT LOW BEAM OUTPUT N 10A L39 20LB FRONT FOG LAMP SWITCH OUTPUT N 10A L39 20LB FRONT FOG LAMP SWITCH OUTPUT T R 5 185 CONNECTOR PINOUTS FUSE BLOCK N r N NOT USED NOT USED NOT USED 2 2 N 5 5 2 4 3 4 1 1 2 2 eer J N N 40 39 38 37 FUSE FUSE FUSE FUSE E 20 19 18 17 20 19 25 2 22 222 0 R 36 35 34 33 FUSE FUSE FUSE FUSE 16 15 14 13 GRAY P 32 31 30 29 0 FUSE FUSE FUSE FUSE T 12 11 10 9 5 22 22 22 2 5 5 9 28 27 26 25 FUSE FUSE FUSE FUSE 8 7 6 5 i 2 5 XQ 24 23 22 21 FUSE FUSE FUSE FUSE 4 3 2 1 SS Xx 2 CIRCUIT CIRCUIT BREAKER 2
47. Refer to the Powertrain Category 2 Connect the to the Data Link Connector DLC 3 Reconnect any disconnected components 4 With the DRBIII erase all Transmission 5 also erase the PCM DTC s 5 Perform PRNDL FAULT CLEARING PROCEDURE after completion of repairs for 706 CHECK SHIFTER SIGNAL 6 With the DRBIII display Transmission Temperature Start and run the engine until the Transmission Temperature is HOT above 43 C or 110 F 7 Check thetransmission fluid and adjust if necessary Refer tothe Service Information for the Fluid Fill procedure 8 NOTE If the Transmission Control Module or Torque Converter has been replaced or if the Transmission has been repaired or replaced it is necessary to perform the DRBIII Quick Learn Procedure and reset the Pinion Factor 9 Road test the vehicle With the DRBIII monitor the engine RPM Make 15 to 20 1 2 2 3 3 4 upshifts Perform these shifts from a standing start to 45 MPH with a constant throttle opening of 20 to 25 degrees 10 Below 25 MPH make 5 to 8 wide open throttle kickdowns to 1st gear Allow at least 5 seconds each in 2nd and 3rd gear between each kickdown 11 For a specific DTC drive the vehicle to the Symptom s When Monitored When Set conditions to verify the DTC is repaired 12 If equipped with AutoStick upshift and downshift several times using the AutoStick feature during the road test 13 NOTE Use the E ATX OBDII task manag
48. TEMPERATURE SENSOR 56 P0714 TRANSMISSION TEMPERATURE SENSOR INTERMITTENT 60 PO715 INPUT SPEED SENSOR ERROR cee eee dd 62 P0720 OUTPUT SPEED SENSOR 66 P0725 ENGINE SPEED SENSOR CIRCUIT 55255 eet hou tudes eas 70 P0731 GEAR RATIO ERROR IN 187 55 255 lt lt 5 erat ew ewes 72 P0732 GEAR RATIO ERROR IN 2ND sidii adiis 74 P0733 GEAR RATIO ERROR 1 3 77 P0734 GEAR RATIO ERROR IN SoS 80 P0736 GEAR RATIO ERROR 83 P0740 TORQUE CONVERTER CLUTCH CONTROL 85 P0750 LR SOLENOID CIRCUIT bess dees as Ses edu co Benen 87 P0755 2 4 SOLENOID CIRCUIT 555365 eK es oy 91 P0760 OD SOLENOID CIRCUIT 525 95 P0765 UD SOLENOID CIRCUIT i s dea ta eG tie iict aiani baa diese eae toms 99 P0841 LR PRESSURE SWITCH SENSE CIRCUIT 12 2022 102 P0845 2 4 HYDRAULIC PRESSURE TEST 106 0846 2 4 PRESSURE SWITCH SENSE CIRCUIT 111 P0870 OD HYDRAULIC PRESSURE TEST 115 P0871 OD PRESSURE SWITCH SENSE CIRCUIT
49. TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the 2 4 Pressure Switch Sense circuit 15 the voltage above 0 5 volts Yes Repair the 2 4 Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 10 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running Using a 12 volt test light connected to ground check Transmission Control Relay Output circuit in the Transmission Solenoid Pressure Switch Assembly harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 11 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 109 TRANSMISSION NGC P0845 2 4 HYDRAULIC PRESSURE TEST FAILURE Continued ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all po
50. Temperature sensor gt Temperature sensor wiring circuit gt Internal controller Name of code P0713 7C Transmission temper ature sensor high When monitored Every 7 milliseconds with the engine running and no loss of prime DTC set Set condition Sensor output voltage greater than 4 94 Theory of operation The temperature sensor thermistor is used to sense the temperature of the transmission fluid Transmission fluid tempera GENERAL INFORMATION ture can affect shift quality torque converter lock up and when and if some diagnostics are run A failed temperature sensor could affect the OBDII diagnostics therefore when a fault is detected in the temperature sensor circuit transmission tem perature will be based on a calculated temperature value Transmission effects When the fault is set calculated temperature is substituted for sured temperature however the fault code is stored only after three consecutive occurrences of the fault Possible causes gt Temperature sensor gt Temperature sensor wiring circuit gt Internal controller Name of code P0714 7D Transmission temper ature sensor intermittent When monitored Every 7 milliseconds with the engine running and no loss of prime DTC set Set condition Temperature reading change greater than maximum change allowed loop Theory of operation The temperature sensor thermistor is used to sense the temperature of the
51. VER 1 No Test Complete If there are no possible causes remaining view repair Repair Perform the Hydraulic Pressure test per the Service Information and repair the internal transmission components and Torque convertor as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 86 TRANSMISSION NGC Symptom 750 SOLENOID CIRCUIT When Monitored and Set Condition P0750 LR SOLENOID CIRCUIT When Monitored Initially at power up then every 10 seconds thereafter The solenoids will also be tested immediately after a gear ratio or pressure switch error is detected Set Condition Three consecutive solenoid continuity test failures or one failure if test is run in response to a gear ratio or pressure switch error POSSIBLE CAUSES RELATED RELAY 5 PRESENT TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN LR SOLENOID CONTROL CIRCUIT OPEN LR SOLENOID CONTROL CIRCUIT SHORT TO GROUND LR SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE SOLENOID PRESSURE SWITCH ASSEMBLY POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine
52. VER 1 Turn the ignition off Disconnect the PCM harness connectors CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Using a 12 volt test light connected to 12 volts probe each ground circuit in the appropriate terminal of special tool 8815 NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Is the light illuminated at all ground circuits Yes GoTo 5 No Repair the Ground circuit s for an open Check the main ground connection to engine block and or chassis Refer to the wiring diagrams located in the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 27 COMMUNICATION NO RESPONSE FROM TRANSMISSION CONTROL MODULE Continued ACTION APPLICABILITY Note E nsure there is PCI Bus communication with other modules on the All vehicle before proceeding If not refer to the symptom list from the menu and repair as necessary Disconnect the PCM harness connectors CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Use Scope input cable CH7058 Cable to Probe adapter CH 7062 and the red and
53. VERIFICATION TEST VER 1 145 TRANSMISSION NGC Symptom P1652 SERIAL COMMUNICATION LINK MALFUNCTION When Monitored and Set Condition P1652 SERIAL COMMUNICATION LINK MALFUNCTION When Monitored Continuously with engine running Set Condition The DTC sets in approximately 20 seconds if no BUS messages are received by the TCM Note Due to the integration of the Powertrain and Transmission Control Modules bus communication between the modules is internal POSSIBLE CAUSES ENGINE COMMUNICATION DTCS PRESENT POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY Ignition on engine not running All With the DRBIII read Engine 5 Are there any Engine Communication DTC s present Yes Refer to the Powertrain category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 2 With the DRBIII erase Transmission Start the Engine Park With the DRBIII read Transmission DTCs NOTE The Engine must run for at least 20 seconds to reset this DTC Did the DTC reset after the engine was started Yes GoTo 3 GoTo 4 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module WITH THE DRBIII PERFORM QUICK LEA
54. WHILE SHIFTER IS NOT IN REVERSE POSITION 168 BACKUP LAMPS 169 CHECKING PARK NEUTRAL SWITCH 171 MANUAL AUTOSTICK 173 PRNDL FAULT CLEARING 175 TRANSMISSION NOISY WITH NO DTC S 176 TRANSMISSION SHIFTS EARLY WITH 177 TRANSMISSION SIMULATOR 8333 WILL POWER 178 VERIFICATION TESTS VERIFICATION TESTS 179 COMPONENT 6 181 81 AUTOSTICK IF 181 8 2 POWERTRAIN CONTROL MODULE 181 8 3 55 181 8 4 TRANSMISSION COMPONENT LOCATIONS 182 CONNECTOR PINOUTS 183 AUTOSTICK SWITCH NATURAL 4 WAY 183 DATA LINK CONNECTOR WHITE 16 WAY 183 FUSES FB LHD 22 22222222 2 2 2424 24 44 2 185 FUSES FB 187 INPUT SPEED SENSOR GRAY 2
55. With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 132 TRANSMISSION NGC Symptom P0891 TRANSMISSION RLY ALWAYS ON When Monitored and Set Condition P0891 TRANSMISSION RLY ALWAYS When Monitored When theignition is turned from the position to the run position and or the ignition is turned from the crank position to the run position Set Condition This DTC set if the Transmission Control Module TCM senses greater than 3 volts at the Transmission Control Relay Output circuits at the TCM prior to the TCM energizing the relay Note Due to the integration of the Powertrain and Transmis sion Control Modules the transmission part of the PCM has its own specific power and ground circuits POSSIBLE CAUSES TRANSMISSION CONTROL RELAY STUCK CLOSED TRANSMISSION CONTROL RELAY CONTROL CIRCUIT SHORT TO VOLTAGE TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO VOLTAGE POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symp
56. With the DRBIII read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 Perform Engine Cooling System diagnostics per the Service Information Is the Engine Cooling System functioning properly Yes GoTo 3 No Repair the cause of the engine overheating Refer to the Service Information for the related symptoms or repair procedures Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 35 TRANSMISSION NGC 0218 TEMPERATURE OPERATION ACTIVATED Continued APPLICABILITY Perform Transmission Cooler Flow Check per the Service Information All Did the Transmission Cooler Flow Check test pass Yes GoTo 4 No Repair or replace the plugged Transmission Oil Cooler
57. all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FAC TOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 41 TRANSMISSION NGC Symptom 706 SHIFTER SIGNAL When Monitored and Set Condition 0706 SHIFTER SIGNAL When Monitored Continuously with the ignition on Set Condition After occurrences one ignition cycle of an invalid PRNDL DTC which lasts for more than 0 1 second Note All indicator lights on the instrument cluster will illuminate boxed when the vehicle engine is not running ignition or engine running park or neutral if a problem exists POSSIBLE CAUSES SHIFTER OUT OF ADJ USTMENT TRS T1 SENSE CIRCUIT OPEN TRS T3 SENSE CIRCUIT OPEN TRS T41 SENSE CIRCUIT OPEN TRS T42 SENSE CIRCUIT OPEN TRS T1 SENSE CIRCUIT SHORT TO GROUND TRS T3 SENSE CIRCUIT SHORT TO GROUND TRS T41 SENSE CIRCUIT SHORT TO GROUND TRS T42 SENSE CIRCUIT SHORT TO GROUND TRS T1 SENSE CIRCUIT SHORT TO VOLTAGE TRS T3 SENSE CIRCUIT SHORT TO VOLTAGE TRS T41 SENSE CIRCUIT SHORT TO VOLTAGE TRS T42 SENSE CIRCUIT SHORT TO VOLTAGE TRANSMISSION RANGE SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS 42 TRANSMISSION NGC 706 SHIFTER SIGNAL Continued ACTION APPLICABILITY NOTE Low fluid level can be the ca
58. an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 63 TRANSMISSION NGC 0715 SPEED SENSOR ERROR Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Input Speed Sensor harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Speed Sensor Ground circuit from the Pinout Box to the Input Speed Sensor harness connector Is the resistance above 5 0 ohms Yes Repair the Speed Sensor Ground circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Input Speed Sensor harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the Speed Sensor Signal circuit 15 the resistance Below 5 0 ohms Yes Repair the Input Speed Sensor Signal circu
59. and the UD Solenoid Control circuit Is the resistance below 5 0 ohms Yes Repair the UD Solenoid Control circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the UD Solenoid Control circuit 15 the voltage above 0 5 volts Yes Repair the UD Solenoid Control circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there an
60. appropriate terminal of special tool 8815 to the Solenoid Pressure Switch Assembly harness connector 15 the resistance above 5 0 ohms Yes Repair the 2 4 Solenoid Control circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 92 TRANSMISSION NGC 755 2 4 SOLENOID CIRCUIT Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the 2 4 Solenoid Control circuit Is the resistance below 5 0 ohms Yes Repair the 2 4 Solenoid Control circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector
61. as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the OD Pressure Switch Sense circuit 15 the voltage above 0 5 volts Yes Repair the OD Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 10 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit in the Solenoid Pressure Switch Assembly harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 11 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NG
62. battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 With the DRBIII Check the STARTS SINCE SET counter for P0888 All Note This counter only applies to the last DTC set Is the STARTS SINCE SET counter equal to 0 Yes GoTo 3 No GoTo 11 Turn the ignition off to the lock position Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Using a 12 volt test light connected to ground check the Fused B circuit in the Transmission Control Relay connector NOTE The test light mus
63. black test probes Connec the scope input cable to the channel one connector on the DRB Attach the red and black leads and the cable to probe adapter to the scope input cable With the DRBIII select Pep Module Tools Select lab scope Select Live Data Select 12 volt square wave Press F2 for Scope Press F2 and use the down arrow to set voltage range to 20 volts Set Probe to x10 Press F2 again when complete Connect the Black lead to the chassis ground Connect the Red lead to the PCI Bus circuit in the appropriate terminal of special tool 8815 Turn the ignition on Observe the voltage display on the DRB Lab Scope Does the voltage pulse from 0 to approximately 7 5 volts Yes Replace and program the Powertrain Control Module in accor dance with the service information WITH THE DRBIII PER FORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 Turn the ignition off Disconnect the PCM harness connectors CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Disconnect the BCM C3 harness connector Measure the resistance of the PCI Bus circuit from the BCM C3 harness connector to the appropriate terminal of special tool 8815 15 the resistance below 5 0 ohms Yes Replace the B
64. by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the read Transmission DTC s Are any of the DTCs P0732 P0734 and or P0846 present also Yes ReplacetheTransmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 4 With the DRBIII Check the STARTS SINCE SET counter for P0845 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 5 No GoTo 12 With the DRBIII check for other Transmission All Is the DTC P0944 present also 107 TRANSMISSION NGC P0845 2 4 HYDRAULIC PRESSURE TEST FAILURE Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the
65. check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 91 TRANSMISSION NGC 755 2 4 SOLENOID CIRCUIT Continued ACTION APPLICABILITY With the DRBIII read Transmission DTC s Are there any Transmission Control Relay DTC s present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With
66. circuit Yes Repair the Transmission Control Relay Output circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 Turn the ignition off to the lock position Remove the Transmission Control Relay Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Transmission Control Relay Control circuit between the Transmission Control Relay connector and the appropriate terminal of special tool 8815 15 the resistance above 5 0 ohms Yes Repair the Transmission Control Relay Control circuit for open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 7 Turn the ignition off to the lock position Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the Transmission Control Relay Output circuit Is the resistance below 5 0 ohms Yes Repair th
67. greater than 85 POSSIBLE CAUSES RELATED 5 PRESENT INTERNAL TRANSMISSION INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 85 TRANSMISSION NGC 740 CONVERTER CLUTCH CONTROL CIRCUIT Continu
68. many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 With the DRBIII check Transmission Are there any Speed Sensor and or other Temperature Sensor DTCs present Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3
69. module the TRD bus messages are sent over a internal bus circuit View repair Repair Replace the Powertrain Control Module per the Service Informa tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 163 TRANSMISSION NGC Symptom P1794 SPEED SENSOR GROUND ERROR When Monitored and Set Condition P1794 SPEED SENSOR GROUND ERROR When Monitored The transmission gear ratio is monitored continuously while the transmission is in gear Set Condition After a PCM reset in neutral Input Output Ratio equals a ratio of 2 50 to 1 0 50 0 RPM POSSIBLE CAUSES SPEED SENSOR GROUND CIRCUIT OPEN POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary P
70. of prime test begins Available elements are turned on by the PCM to see if pump prime exists The DTC sets if no pressure switches respond POSSIBLE CAUSES SHIFT LEVER POSITION PLUGGED TRANSMISSION OIL FILTER TRANSMISSION OIL PUMP INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this proc
71. pressure switch is open or closed at the wrong time in a given gear GENERAL INFORMATION Theory of operation The PCM uses three pres sure switches to monitor the fluid pressure in the LR 2 4 and OD dutch circuits The pressure switches are continuously monitored for the correct states in each gear as shown below PRESSURE SWITCH STATES CLOSED CLOSED 80d9d3b5 Transmission Effects Normal operation will be experienced if no other codes are present Trans mission Control System will ignore the code Limp in condition will only occur if code P0871 21 is present with a code 706 28 Possible causes gt If code 0944 35 is present ignore code P0871 21 and perform code P0944 diagnostic procedures gt OD pressure switch sense circuit open shorted to ground between PCM and solenoid pack gt OD pressure switch sense circuit shorted to battery gt Solenoid Pressure Switch assembly gt Loose valve body bolts gt Plugged filter internal transmission or torque converter failure gt PCM Name of code P0846 22 2 4 Pressure Switch Sense Circuit When monitored Whenever the engine is run ning Set condition This code is set if the 2 4 pressure switch is open or closed at the wrong time in a given gear Theory of operation The Transmission system uses three pressure switches to monitor the fluid pressure in the LR 2 4 and OD elements The pressure switches are conti
72. prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 87 TRANSMISSION NGC P0750 LR SOLENOID CIRCUIT Continued ACTION APPLICABILITY With the DRBIII read Transmission DTC s Are there any Transmission Control Relay DTC s present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter NOTE This counter only applies to the last DTC set 15 the STARTS SINCE SET counter for P0750 set at 0 Yes GoTo 4 No GoTo 11 Turn the ignition off to the lock posi
73. schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 69 TRANSMISSION NGC Symptom P0725 E NGINE SPEED SENSOR CIRCUIT When Monitored and Set Condition 0725 SPEED SENSOR CIRCUIT When Monitored Whenever the engine is running Set Condition The Engine RPM is less than 390 or greater than 8000 for more than 2 seconds while the engine is running POSSIBLE CAUSES ENGINE DTCS PRESENT POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair
74. set this DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits Pay particular attention to the TPS signal and sensor ground circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 32 TRANSMISSION NGC Symptom P0124 THROTTLE POSITION SENSOR APPS INTERMITTENT When Monitored and Set Condition P0124 THROTTLE POSITION SENSOR APPS INTERMITTENT When Monitored Continuously with the ignition on and engine running Set Condition This DTC will set if the monitored TPS throttle angle between the angles of 6 and 120 and the degree change is greater than 5 within a period of less than 7 0 ms POSSIBLE CAUSES RELATED TPS ENGINE DTC S PRESENT THROTTLE POSITION SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine
75. test for P0706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 With the DRBIII check Engine DTC s this includes all trip failures Are there any Engine TPS DTCs present Yes Refer to the Powertrain category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 3 29 TRANSMISSION NGC 0122 POSITION SENSOR APPS LOW Continued ACTION APPLICABILITY With the 119 record the EATX EVENT DATA to help identify the conditions All which the DTC was set With the DRBIII erase Transmission DTCs NOTE To erase EATX EVENT DATA information BATTERY DISCONNECT must be performed Performing a BATTERY DISCONNECT will reset all learned Transmission values to controller defaults which may lead to erratic shift schedules Drive the vehicle and try to duplicate the conditions in which the DTC was reported by the EATX EVENT DATA With the DRBIII read Transmission DTCs Did the DTC P0122 THROTTLE POSITION SENSOR LOW
76. than 7 2 for 200ms NOTE P0562 generally indicates a gradually falling battery voltage resistive connection s to the PCM Theory of operation The Transmission system requires sufficient battery voltage in order to ener gize the transmission solenoids The PCM contin uously monitors the voltage available to the sole noids Transmission effects At speeds above 72 Km h 45 MPH the transmission system will default to neutral Below 72 Km h 45 MPH the transmis sion system will default to Limp in mode and the MIL will illuminate after 5 minutes of substituted operation Manual gear selection of Park Reverse Neutral and Second will be available Possible causes gt Charging system problem gt Poor High resistance connection between PCM and Battery Alternator gt PCM high resistance or poor connection gt PCM ground high resistance or poor connection gt High resistance in Transmission Control Relay contacts gt PCM Name of code P0711 7A Transmission temper ature sensor performance When monitored Every 7 milliseconds with the engine running and no loss of prime DTC set 17 GENERAL INFORMATION Set condition A temperature reading of 80 F is not reached in the specified period of time Theory of operation The temperature sensor thermistor is used to sense the temperature of the transmission fluid Transmission fluid tempera ture can affect shift quality torque converter lock
77. the Input RPM read 3000 and the Output RPM read 1250 within 50 RPM Yes GoTo 4 No GoTo 5 If there are no possible causes remaining view repair Repair Replace the Output Speed Sensor per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Output Speed Sensor harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Output Speed Sensor Signal circuit from appropriate terminal of special tool 8815 to the Output Speed Sensor harness connector Is the resistance above 5 0 ohms Yes Repair the Output Speed Sensor Signal circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 67 TRANSMISSION NGC 720 SPEED SENSOR ERROR Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Output Speed Sensor harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING I
78. the OD Pressure Switch Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the OD Pressure Switch Sense circuit 15 the voltage above 0 5 volts Yes Repair the OD Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit NOTE The Test light must illuminate brightly
79. the complaint or concern what you think the problem is based on the driver s description of the problem e 15 the Transmission operating normally is there a real problem e When does the problem occur e 15 the problem only one gear range What temperature does the problem occur e Does the vehicle have to sit over night for the problem to occur Does the transmission go into Limp in mode 4 3 3 ELECTRONIC PINION FACTOR WARNINGS IF APPLICABLE The pinion factor must be set when replacing the PCM Note The pinion factor is a fixed number and cannot be changed or updated in some vehicle applications f the pinion factor is not set or incorrectly set any speed related functions will not operate correctly i e speedometer speed control rolling door locks and other control modules will be affected that depend on speed information 4 3 4 BULLETINS AND RECALLS Always perform all Safety Recalls and Technical Service Bulletins that are applicable to the prob lem 5 0 REQUIRED TOOLS AND EQUIPMENT gt DRBIII diagnostic read out box M ust be at latest release level gt Transmission Simulator Miller 8333 gt Electronic Transmission Adapter kit Miller 8333 1 gt umper wires gt Test Light minimum of 25 ohms of resis tance gt Ohmmeter gt Voltmeter gt Pressure gauge 0 2068 kPa 0 300 PSI gt Diagnostic Pinout Box Miller 8815 gt Terminal remover Miller 3
80. the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the Transmission Simulator set the Input Output Speed switch to and the rotary switch to the 3000 1250 position With the DRBIII read the Input and Output RPM Does the Input speed read 3000 RPM and the Output speed read 1250 RPM 50 RPM Yes GoTo 4 No GoTo 5 If there are no possible causes remaining view repair Repair Replace the Input Speed Sensor per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Input Speed Sensor harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Speed Sensor Signal circuit from the appropriate terminal of special tool 8815 to the Input Speed Sensor connector 15 the resistance above 5 0 ohms Yes Repair the Input Speed Sensor Signal circuit for
81. the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for P0706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 Start the engine NOTE This DTC is not a Transmission Input Speed Sensor DTC With the DRBIII Check the STARTS SINCE SET counter for P0725 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter for P0725 set at 0 Yes GoTo 3 GoTo 5 70 TRANSMISSION NGC P0725 E NGINE SPEED SENSOR CIRCUIT Co
82. tool 8333 and the Electronic Transmission Adapter kit 8333 1A This DTC can also be set under extreme temperature conditions this is usually caused by an internal problem Verify if the problem is only experienced under extreme hot or cold conditions With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete If there are no possible causes remaining view repair Repair Repair internal Transmission per the Service Information Check all of the components related to the UD and LR clutches Inspect the Oil Pump and repair or replace per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 73 TRANSMISSION NGC Symptom P0O732 GEAR RATIO ERROR IN 2ND When Monitored and Set Condition 0732 RATIO ERROR IN 2ND When Monitored The Transmission gear ratio is monitored continuously while the Transmission is in gear Set Condition If the ratio of the Input RPM to the Output RPM does not match the current gear ratio POSSIBLE CAUSES RELATED PRESENT TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY INTERNAL TRANSMISSION INTERMITTENT GEAR RATIO ERRORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the lea
83. transmission fluid Transmission fluid tempera ture can affect shift quality torque converter lock up and when and if some diagnostics are run A failed temperature sensor could affect the OBDII diagnostics therefore when a fault is detected in the temperature sensor circuit transmission tem perature will be based on a calculated temperature value Transmission effects When the fault is set calculated temperature is substituted for mea sured temperature however the fault code is stored only after three consecutive occurrences of the fault Possible causes gt Temperature sensor gt Temperature sensor wiring circuit gt Internal controller 3 3 9 QUICK LEARN The Quick Learn function customizes adaptive parameters of the PCM to the transmission char acteristics of a vehicle This gives the customer improved as received shift quality compared to the initial parameters stored in the PCM Notes about Quick Learn Features The nature of the Quick Learn function requires that certain features must be taken into consider ation gt Quick Learn should generally not be used as a repair procedure unless directed by a repair or diagnostic procedure If the transmission system is exhibiting a problem that you think is caused by an invalid CVI you should try to relearn the value by performing the appropri ate driving maneuvers In most cases if a quick learn makes a vehicle shift better the vehicle will re
84. up and when and if some diagnostics are run A failed temperature sensor could affect the OBDII diagnostics therefore when a fault is detected in the temperature sensor circuit transmission tem perature will be based on a calculated temperature value Transmission effects When the fault is set calculated temperature is substituted for sured temperature however the fault code is stored only after three consecutive occurrences of the fault Possible causes gt Temperature sensor gt Temperature sensor wiring circuit gt Internal controller Name of code P0712 7B Transmission temper ature sensor low When monitored Every 7 milliseconds with the engine running and no loss of prime DTC set Set condition Sensor output voltage less than 0 078v Theory of operation The temperature sensor thermistor is used to sense the temperature of the transmission fluid Transmission fluid tempera ture can affect shift quality torque converter lock up and when and if some diagnostics are run A failed temperature sensor could affect the OBDII diagnostics therefore when a fault is detected in the temperature sensor circuit transmission tem perature will be based on a calculated temperature value Transmission effects When the fault is set calculated temperature is substituted for mea sured temperature however the fault code is stored only after three consecutive occurrences of the fault Possible causes gt
85. with several examples on how to interpret the informa tion and suggested training material to help under stand all the specifics EATX DTC EVENT DATA can only be erased by 1 Disconnecting the battery 2 Performing a DRBIII QUICK LEARN proce dure 3 Reprogramming the EATX NGC controller Erasing Transmission DTCs does not clear the EATX DTC EVENT DATA 3 3 7 LIST OF DIAGNOSTIC TROUBLE CODES DETAILED DESCRIPTIONS FOLLOW LIST The Transmission Control System may report any of the following GENERAL INFORMATION The Transmission Control System may report any of the following DTC s DTC Name of Code 11 P0613 nternal TCM 12 Battery was disconnected 13 nternal TCM 14 Transmission Relay always on 15 Relay output always off 16 nternal TCM 17 nternal TCM 18 Engine speed sensor circuit 19 Bus communication with engine module No 2s P0706 Check shifter signal No 29 P0124 Throttle Position Sensor APPS Intermittent No P0122 Throttle Position Sensor APPS low No Yes 28 123 Throttle Position Sensor APPS high No Yes 3s Poa Loss ofprime No 38 P1790 Fault immediately after shift No No 7 P1775 Solenoid switch valve latched in TCC position No Yes 38 0740 Torque converter clutch control no Yes 44 0765 UD Solenoid crit es 45 7 P0613 internal oo fa P0952 Autostick input droit ow No 70 0953 Autostick i
86. 0 13 12 SPARE USED 15 HZIFLSH PIOUT 17 EATX MTV 19 SPARE HORN 21 FP ASD FOG 23 STP LMP AIC 22 189 R CONNECTOR PINOUTS FUSES PDC FUSE AMPS FUSED CIRCUIT FUNCTION NO 1 2 40 12RD WT FUSED B 4 140 2 12PK BK FUSED B 5 30 A20 12RD DB ABS FUSED B 6 30A A16 14GY 2 0L FUSED B 6 30A 16 12GY 2 4L TURBO FUSED B 7 40 10 1280 00 ABS FUSED B 9 30A 1 14RD FUSED B 10 40A A4 10BK RD 2 0L FUSED B 10 40A 4 10 2 4L TURBO FUSED B 11 12 13 20 M11 16PK LB FUSED B 14 20A 1 1608 FUSED B 15 15 15 18WT 2 0L FUSED B 15 15A 15 18RD PK 2 4L TURBO FUSED B c 16 15A A200 18RD BR 2 0L RT FUSED B 17 20 30 16 2 0 U A30 16RD WT 2 0L EATX FUSED 18 10A F62 20RD 2 0L FUSED B N 18 10A F62 20RD 2 0L FUSED B 18 15 62 18RD 2 4L U F62 18RD TURBO FUSED B 18 15 62 18RD 2 4L U F62 18RD TURBO FUSED B T 19 20 25 61 16 U F61 16WT OR EXPORT FUSED R 21 20A 14 16RD WT FUSED B 22 10A 17 20RD BK FUSED B 23 15 32 18 U 2 18PK DB FUSED N TRANSMISSION CONTROL RELAY CAV CIRCUIT FUNCTION 0 44 71 20BK GROU
87. 0944 PRESENT TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN 2 4 PRESSURE SWITCH SENSE CIRCUIT OPEN 2 4 PRESSURE SWITCH CIRCUIT SHORT TO GROUND INTERNAL TRANSMISSION 2 4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE TRANSMISSION SOLENOID TRS ASSEMBLY POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS 106 TRANSMISSION NGC P0845 2 4 HYDRAULIC PRESSURE TEST FAILURE Continued ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected
88. 1 0 2 0 3 0 4 0 5 0 TABLE OF CONTENTS INTRODUCTION aa Meee ese dl ee ee 1 11 SYSTEM COVERAGE 1 12 SIX STEP TROUBLESHOOTING PROCEDURE 1 IDENTIFICATION OF 5 5 2 lt 5 42 2 1 SYSTEM DESCRIPTION AND FUNCTIONAL 1 3 1 GENERALE DESCRIPTION 2 43 sieedtewn ia aa e E 1 3 2 FUNCTIONAL gee exe 1 3 2 1 AUTOSTICK FEATURE IF 2 3 2 2 TRANSMISSION OPERATION AND SHIFT SCHEDULING AT VARIOUS OIL 2 3 3 DIAGNOSTIG TROUBLE CODES cece be eed bebe ys 3 3 3 1 52255889 neers Peer 3 3 32 ONE TRIP FAILURES ese 650854 oo sand He 3 3 3 3 INTERMITTENT CODE Geese 4 3 3 4 STARTS SINCE SET COUNTER 4 3 3 5 TROUBLE CODE 5 4 3 3 6 EAIX DITC EVENT 454586 9 hoe tele 3 4 3 3 7 LIST OF DIAGNOSTIC TROUBLE CODES DETAILED DESCRIPTIONS FOLLOW USI ye 58 eee su noe 4 328 DTC DESCRIPTIONS 6 339 Q
89. 2 1 TECHNICIAN SAFETY INFORMATION WARNING ENGINES PRODUCE CARBON MONOXIDE THAT IS ODORLESS CAUSES SLOWER REACTION TIME AND CAN LEAD TO SERIOUS INJURY WHEN THE ENGINE IS OPERATING KEEP SERVICE AREAS WELL VENTILATED OR ATTACH THE VEHICLE EXHAUST SYSTEM TO THE SHOP EXHAUST REMOVAL SYSTEM Set the parking brake and block the wheels before testing or repairing the vehicle It is espe cially important to block the wheels on front wheel drive vehicles the parking brake does not hold the drive wheels Some operations in this manual require that hydraulic tubes hoses and fittings disconnected for inspection or testing purposes These systems when fully charged contain fluid at high pressure Before disconnecting any hydraulic tubes hoses or fittings be sure that the system is fully depres surized When servicing a vehicle always wear eye pro tection and remove any metal jewelry such as watchbands or bracelets that might make an inad vertent electrical contact When diagnosing a Transmission system prob lem it is important to follow approved procedures where applicable These procedures can be found in the service information Following these proce dures is very important to the safety of individuals performing diagnostic tests 4 2 2 VEHICLE PREPARATION FOR TESTING Make sure the vehicle being tested has a fully charged battery If it does not false diagnostic DTC s or error messages may occur It is extremely import
90. 20VT WT TRS 742 SENSE 10 T41 20BK WT TRS T41 SENSE TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY BLACK 8 WAY CAV CIRCUIT FUNCTION 1 T47 18YL BK 2 4 PRESSURE SWITCH SENSE 2 50 18DG LOW REVERSE PRESSURE SWITCH SENSE 3 9 18 OVERDRIVE PRESSURE SWITCH SENSE 4 16 16RD TRANSMISSION CONTROL RELAY OUTPUT 5 59 18 UNDERDRIVE SOLENOID CONTROL 6 60 18BR OVERDRIVE SOLENOID CONTROL 7 T20 18LB LOW REVERSE SOLENOID CONTROL 8 T19 18WT 2 4 SOLENOID CONTROL 196 SCHEMATIC DIAGRAMS 10 0 SCHEMATIC DIAGRAMS TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY FWD TRANSMISSION NGC POWERTRAIN CONTROL MODULE 7 TRANSMISSION CONTROL TRANSMISSION CONTROL RELAY FUSED B ONO RELAY OUTPUT TRANSMISSION CONTROL RELAY OUTPUT TRANSMISSION CONTROL RELAY CONTROL FUSED B FUSED IGNITION SWITCH OUTPUT START ONO FUSED IGNITION SWITCH OUTPUT OFF RUN START WITHOUT AUTOSTICK RUN START 5 TRANSMISSION RANGE SENSOR TRS P N POSITION SWITCH SENSE 741 TRS 41 SENSE OFF RUN START SCI RECEIVE TCM SCI TRANSMIT UR SOLENOID CONTROL PCI BUS SIGNAL 2 4 SOLENOID CONTROL OD SWITCH SENSE OD SOLENOID CONTROL PCM SCI TRANSMIT UD SOLENOID CONTROL PCM SCI RECEIVE 5 VOLT SUPP
91. 51 gt Speed sensor or associated wiring may also set codes 0731 51 715 56 or 720 57 gt Failed or slipping LR clutch may also set code 0731 51 LR seal leakage Intermittent no drive or reverse Sticky LR accumulator seals Intermittent no drive or reverse gt Failed reverse clutch hard code OD Rev lip seal leakage Worn reaction shaft support seal rings Snap ring out of position Code 0731 51 Excludes geartrain failures which should be obvious upon disassembly gt If code P0944 35 is also set follow diagnostic procedure for code P0944 35 first gt Valve body 1 ball check or LR switch valve sticking may also set code P 0736 56 or have no Reverse gt Speed sensor or associated wiring may also set codes 0736 50 715 56 or 720 57 gt Failed or intermittent slipping UD clutch may also set 0732 52 733 53 UD seal leakage intermittent Worn input clutch hub bushing hard code at heavy throttle Sticky UD accumulator seals intermittent Worn reaction shaft support seal rings hard code at heavy throttle Solenoid pack UD pressure in 4th gear gt Failed or slipping LR clutch may also set code 0736 56 have no Reverse LR seal leakage Intermittent Sticky LR accumulator seals Intermittent Code 0732 52 Excludes geartrain failures which should be obvious upon disassembly gt If code P0944 35 is also set follow d
92. 638 6 0 GLOSSARY OF TERMS 6 1 ACRONYMS APPS Accelerator Pedal Position Sensor BCM Body Control Module CKT Circuit CVI Clutch Volume ndex DLC Data Link Connector Diagnostic Readout Box DTC Diagnostic Trouble Code EATX Electronic Automatic Transaxle EMCC Electronically Modulated Converter Clutch FCM Front Control Module part of the IPM system FEMCC Full Electronically Modulated Converter Clutch 10D Ignition off draw IPM Integrated Power Module IRT Intelligent Recovery Timer ISS Input Speed Sensor LED Light Emitting Diode LR Low reverse Clutch or Pressure Switch LU Lockup MIC Mechanical Instrument Cluster MIL Malfunction Indicator Lamp NGC Next Generation Controller 23 GENERAL INFORMATION OBDII On Board Diagnostics OD Overdrive Clutch or Pressure Switch 055 Output Speed Sensor PCM Powertrain Control Module PEMCC Partial Electronically Modulated Converter Clutch PLU Partial Lockup REV Reverse Clutch SLPK Solenoid Pack SSV Solenoid Switch Valve SW Switch TCC Torque Converter Clutch PCM Combined PCM and Transmission Control Module TPS Throttle Position Sensor TRD Torque Reduction TRS Transmission Range Sensor UD Underdrive Clutch 2 4 2nd and 4th gear Clutch or Pressure Switch 6 2 DEFINITIONS OBDII EURO STAGE OBD Trip A vehicle start and drive cycle such that all once per trip dia
93. ANSMISSION NGC P0750 LR SOLENOID CIRCUIT Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the LR Solenoid Control circuit Is the resistance below 5 0 ohms Yes Repair the LR Solenoid Control circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the LR Solenoid Control circuit 15 the voltage above 0 5 volts
94. C When shifting into 1st gear a special hydraulic sequence is performed to ensure SSV movement into the downshifted position The LR pressure switch is monitored to confirm SSV movement If movement is not confirmed the LR pressure switch does not close 2nd gear is substituted for 1st Transmission Effects Transmission will have 1st gear 2nd gear will be substituted and no EMCC operation and the MIL will illuminate after 5 minutes of substituted operation Possible causes gt PRNDL indicates a valid OD codein the hydrau lic reverse position gt Valve body Solenoid valve stuck in TCC posi tion gt High idle speed GENERAL INFORMATION gt Solenoid malfunction LR pressure switch will not close gt LR Pressure Switch Sense circuit shorted to battery Name of code P0740 38 Torque Converter Clutch Control Circuit When monitored During Electronically Modu lated Converter Clutch EMCC Set condition a The transmission must be in EMCC with the input speed greater than 1750 RPM The TCC LR solenoid must achieve it s maximum duty still not be able to pull the engine speed within 60 RPM of input speed b If the transmission is in FEMCC and the engine can slip the TCC by more than 100 RPM Engine speed Input speed for 10 seconds The code will be set if one of these event happens threetimes at a throttle angle less than 30 degrees Theory of operation When in 2nd
95. C TRANSMISSION VERIFICATION TEST VER 1 118 TRANSMISSION NGC P0870 OD HYDRAULIC PRESSURE TEST FAILURE Continued ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service nforma tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 119 TRANSMISSION NGC Symptom P0871 OD PRESSURE SWITCH SENSE CIRCUIT When Monitored and Set Condition P0871 OD PRESSURE SWITCH SENSE CIRCUIT When Monitored Whenever the engine is running Set Condition The DTC is set if one of the pressure switches are open or closed at the wrong time in a given gear POSSIBLE CAUSES RELATED RELAY 5 PRESENT OD PRESSURE SWITCH SENSE CIRCUIT OPEN OD
96. CTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Transmission Temperature Sensor Signal circuit from the appropriate terminal of special tool 8815 to the Transmission Solenoid TRS Assembly harness connector Is the resistance above 5 0 ohms Yes Repair the Transmission Temperature Sensor Signal circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 Turn the ignition off to the lock position Disconnect the PCM C4 harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running Measure the voltage of the Transmission Temperature Sensor Signal circuit in the appropriate terminal of special tool 8815 15 the voltage above 0 5 volts Yes Repair the Transmission Temperature Sensor Signal circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention
97. Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 With the DRBIII check Transmission Are there any Speed Sensor DTCs present Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 3 53 TRANSMISSION NGC 0712 5 155 TEMPERATURE SENSOR LOW Continued ACTION APPLICABILITY With the DRBIII Check the STARTS SINCE SET counter for P0712 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 GoTo 8 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the Input Output switch to OFF With the DRBIII monitor the TRANS TEMP VOLTS while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator Compare the DRBIII readings with the numbers listed on the Transmission Simulator Do the readings the Transmission Simulator match the DRBIII readings 0 2 volts Yes
98. Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 10 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 122 TRANSMISSION NGC P0871 OD PRESSURE SWITCH SENSE CIRCUIT Continued ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service Informa tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 123 TRANSMISSION NGC Symptom 884 UP AT SPEED When Monitored and Set Condition
99. Complete Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 175 TRANSMISSION NGC Symptom TRANSMISSION NOISY WITH NO DTC S PRESENT POSSIBLE CAUSES INTERNAL TRANSMISSION PROBLEM NOISY INTERNAL TRANSMISSION PROBLEM NOISY WHILE STANDING STILL ACTION APPLICABILITY Check and adjust the oil level per the Service Information before continuing Place vehicle on hoist Run vehicle on hoist under conditions necessary to duplicate the noise CAUTION BE SURE TO KEEP HANDS AND FEET CLEAR OF ROTATING WHEELS Using Chassis Ears or other suitable device verify that the noise is coming from the transmission 15 the noise coming from the transmission Yes GoTo 2 No Test Complete If there no possible causes remaining view repair Repair Repair internal transmission problem as necessary Inspect all of the transmission components for signs of wear If no problems found replace the Transmission Oil pump If there are no possible causes remaining view repair Repair Repair internal transmission problem as necessary Inspect all of the transmission components for signs of wear Pay particular attention to bearings pinion gears etc Repair or replace as necessary With the shift lever in neutral raise the engine speed and listen to the noise All NOTE THE RADIO MUST BE TURNED OFF Alternator noise can come through the speakers and be misinterpreted as Transmission Pump Whine This can ha
100. Control Relay Output Circuit in the Transmission Control Relay Is the resistance above 5 0 ohms Yes GoTo 4 Replace the Transmission Control Relay Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Yes Repair the Transmission Control Relay Output circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 5 Turn the ignition off to the lock position Remove the Transmission Control Relay Ignition on engine not running Note Check connectors Clean repair as necessary Measure the voltage at the Transmission Control Relay Control circuit Is the voltage above 0 5 volts Yes Repair the Transmission Control Relay Control circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 Turn the ignition off to the lock position All Remove the Transmission Control Relay Disconnect the PCM harness connector Note Check connectors Clean repair as necessary Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage at the Transmission Control Relay Output circuit in the Transmission Control Relay connector 15 the voltage above 0 5 volts 134 TRANSMISSION NGC P0891 TRANSMISSION RLY ALWAYS
101. D T41 C1 CLOSED OPEN OPEN OPEN CLOSED OPEN OPEN OPEN OPEN OPEN T42 C2 CLOSED CLOSED CLOSED CLOSED CLOSED CLOSED OPEN OPEN OPEN CLOSED H R T 5 D G R A P H S 80ccfe38 11 2 PRESSURE SWITCH STATES PRESSURE SWITCH STATES A n am oren open oren erosen oren oroseo 00 OPEN 80d9d3b5 199 H R T 5 D G R A P H S CHARTS AND GRAPHS 11 3 SOLENOID APPLICATION CHART SOLENOID APPLICATION CHART 11 4 SHIFT LEVER ERROR CODES 80ccf4c0 SHIFT LEVER ERROR CODES REPORTED BY THE DRBIII SWITCH STUCK POSITION ERROR CODE T1 C4 STUCK T1 C4 STUCK T3 C3 STUCK T3 C3 STUCK T42 C2 STUC T24 C2 STUCK T41 C1 STUCK T41 C1 STUCK 200 CLOSED CLOSED CLOSED CLOSED 80ccf2de CHARTS AND GRAPHS 11 5 TRANSMISSION TEMPERATURE SENSOR TRANSMISSION TEMPERATURE SENSOR DUAL RANGE START ENGINE WITH DRB MONITOR AND RECORD TRANSMISSION TEMPERATURE VOLTAGE COMPARE THE MEASURED TEMPERATURE AND VOLTAGE WITH THE GRAPH SHOWN BELOW THE MEASURED VALUE SHOULD FALL ON ONE OF THE LINES ON THE GRAPH e Example 1 Defective Thermist
102. E PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the OD Pressure Switch Sense circuit 15 the voltage above 0 5 volt Yes Repair the OD Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 4 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the 2 4 Pressure Switch Sense circuit 15 the voltage above 0 5 volt Yes Repair the 2 4 Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 5 131 TRANSMISSION NGC P0890 SWITCHED BATTERY Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnec
103. EMCC to PEMCC operation before theA C clutch engagement will be disabled for 35 OBDII EURO STAGE 111 OBD warm up starts Possible causes gt Degraded transmission fluid gt Wheels severely out of alignment gt Internal torque converter problem GENERAL INFORMATION Name of code P0218 75 High Temperature Operation Activated NOTE This DTC is an informational DTC designed to aid the technician in diagnosing shift quality concerns When monitored Whenever the engine is run ning Set condition Immediately once the Overheat Shift Schedule is activated Theory of operation If the transmission oil temperature rises above 115 C 240 the over heat shift schedule is activated refer to Transmis sion Operation as a function of Transmission Oil Temperature and the code is set The DTC is an information code only and is being set to aid the technician in determining root cause of a customer driveability issue The code is also intended to alert the technician to determine if a cooling system malfunction has occurred or if an additional trans mission air to oil cooler should be added to the vehicle if the customer regularly drives in a man ner that overheats the transmission Extended operation above 115 C 240 F will reduce the durability of the transmission and should be avoided Correcting the cooling system malfunction or installing an additional transmission oil cooler will improve transmission durability espec
104. ENT INTERNAL TRANSMISSION INTERMITTENT GEAR RATIO ERRORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 83 TRANSMISSION NGC 736 RATIO ERROR IN REVERSE Continued ACTION APPLICABILITY With the DRBIII read Transmission
105. FACTOR WARNINGS IF APPLICABLE 22 434 BULLETINS AND RECALLS 22 REQUIRED TOOLS AND EQUIPMENT 22 6 0 7 0 TABLE OF CONTENTS Continued GLOSSARY OF 25 5 2 225 340 6 554 23 ACRONYMS tee eles 23 6 2 DERINITIONS ore ed Dee Sua 23 DIAGNOSTIC INFORMATION AND 25 COMMUNICATION RESPONSE FROM TRANSMISSION CONTROL MODULE 26 TRANSMISSION NGC P0122 THROTTLE POSITION SENSOR APPS LOW 29 P0123 THROTTLE POSITION SENSOR APPS 31 P0124 THROTTLE POSITION SENSOR APPS INTERMITTENT 33 P0218 HIGH TEMPERATURE OPERATION ACTIVATED 35 P0562 LOW BATTERY VOLTAGE os icici du te oes 37 POGO4 IN TERNAL 422554694 58462858585 ie ep eases 41 POBOS INTERNAL TOM ee REE ee dea ees 41 PUbTS INTERNAL 2 lt whee bee EGE ke be Kes penne vies 41 PO706 GHECK SHIFTER SIGNAL be baw ee 42 P0711 TRANSMISSION TEMPERATURE SENSOR PERFORMANCE 50 P0712 TRANSMISSION TEMPERATURE SENSOR 53 P0713 TRANSMISSION
106. GRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set this DTC are not present at this time Test drive and verify if the transmission is launching in 2nd gear and or no TCC engagement With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Are there 2nd gear launches and or no TCC engagement Yes Disassemble and inspect the Valve Body per the Service nforma tion and repair or replace as necessary no problems are found in the Valve Body replace the Transmission Solenoid Pressure Switch Assembly Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 157 TRANSMISSION NGC Symptom P1776 SOLENOID SWITCH VALVE LATCHED IN LR POSITION When Monitored and Set Condition P1776 SOLENOID SWITCH VALVE LATCHED IN LR POSITION When Monitored Continuously when doing partial or full EMCC PEMCC or FEMCC Set Condition If the PCM senses the L R Pressure Switch closing while performing PEMCC or FEMCC This DTC will be set after two unsuccessful attempts to perform PEMCC or FEMCC POSSIBLE CAUSES RELATED DTC P0841 PRESENT TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN L R PRESSURE SWITCH SENSE CIRCUIT OPEN L R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND L R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE INTERNAL TRANSMISSION POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS AC
107. IAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the TRS T41 Sense circuit from the appropriate terminal of special tool 8815 to the TRS harness connector Is the resistance above 5 0 ohms Yes Repair the TRS T41 Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 14 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the TRS T41 Sense circuit 15 the resistance below 5 0 ohms Yes Repair the TRS T41 Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 15 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between the Fused B circuit and the Transmi
108. IAL TOOL 8815 TO PERFORM DIAGNOSIS Turn the ignition on Using a 12 volt test light connected to ground probe both Fused Ignition Switch Output circuits cavs 11 and 12 in the appropriate terminal of special tool 8815 NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Is the test light illuminated for both circuits Yes GoTo 3 No Repair the Fused Ignition Switch Output circuit for an open Refer to the wiring diagrams located in the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 26 COMMUNICATION NO RESPONSE FROM TRANSMISSION CONTROL MODULE Continued APPLICABILITY Turn the ignition off All Disconnect the PCM harness connectors CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Using a 12 volt test light connected to ground probe the Fused B circuit in the appropriate terminal of special tool 8815 NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Is the test light illuminated Yes GoTo 4 No Repair the Fused B circuit for an open Refer to the wiring diagrams located in the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST
109. ILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Using a 12 volt test light connected to 12 volts check the Ground circuits in the appropriate terminal of special tool 8815 NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly for all the ground circuits Yes GoTo 7 No Repair the Ground circuits for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 150 TRANSMISSION NGC Symptom P1687 NO COMMUNICATION WITH THE MIC When Monitored and Set Condition P1687 NO COMMUNICATION WITH THE MIC When Monitored Continu
110. ITION POSSIBLE CAUSES INTERMITTENT WIRING AND CONNECTORS BACKUP SUPPLY CIRCUIT SHORT TO VOLTAGE TRANSMISSION RANGE SENSOR ACTION APPLICABILITY Ignition on engine not running Firmly apply brakes Place the Shift Lever in the position which causes the Backup Lamps to come on at the wrong time Do the Backup Lamps come on while the shifter is not in Reverse Yes GoTo 2 GoTo 5 Ignition on engine not running Place the shift lever in a position that causes the Backup Lamps to come on when they should not Disconnect the TRS harness connector NOTE This will cause a DTC P0706 and possibly other DTC s to be stored the PCM They must be erased before returning the vehicle to the customer Did the Backup Lamps go out when the TRS harness connector was disconnected Yes GoTo 3 No GoTo 4 Turn the ignition off to the lock position Disconnect the TRS harness connector Ignition on engine not running Measure the voltage of the Backup Light Supply circuit in the TRS harness connector 15 the voltage above 0 5 volt Yes Repair the Backup Lights Supply circuit for short to voltage No Test Complete The conditions necessary to set this DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorts and open circuits Were there any problems found Yes Repair as necessary
111. If there are no possible causes remaining view repair All Repair Replace Transmission Range Sensor per the Service nformation No Test Complete 168 TRANSMISSION NGC Symptom BACKUP LAMPS INOPERATIVE POSSIBLE CAUSES OPEN BACKUP LAMP BULB S BACKUP LAMP GROUND CIRCUIT OPEN BACKUP LAMP SUPPLY CIRCUIT OPEN FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN TRANSMISSION RANGE SENSOR INTERMITTENT BACKUP LAMPS APPLICABILITY Ignition on engine not running Place foot firmly on brake pedal Place the shift lever in the reverse position Do either of the back up lamps work Yes GoTo 2 GoTo 3 If one backup lamp works the problem must be in the bulb or the wiring to the one that doesn t work Check the bulb Backup Lamp Supply circuit and the Ground circuit to the one that does not work Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits View repair options Repair Repair as necessary the Back up Lamps Do either of the Back up Lamps come on Yes Replace Transmission Range Sensor per the Service Informa tion No GoTo 4 Remove both Backup Lamp bulbs NOTE Check the Backup Lamp Sockets and Clean repair as necessary Measure the resistance of the Backup Lamp bulbs 15 the resistance above 5 0 ohms on either bulb Yes Replace the Backup Lamp bulb s Verify the bu
112. LATED CHARGING SYSTEM 5 GROUND CIRCUIT OPEN OR HIGH RESISTANCE FUSED B CIRCUIT TO PCM HIGH RESISTANCE TRANSMISSION CONTROL RELAY OUTPUT TO TCM OPEN OR HIGH RESISTANCE TRANSMISSION CONTROL RELAY POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this proc
113. LR Pressure Switch Sense circuit with code 24 only gt Solenoid Pressure Switch with code P0841 24 only gt PCM with code P0841 24 only Name of code P0736 50 Gear Ratio Error in Reverse 0731 51 Gear Ratio Error in 1st 0732 52 Gear Ratio Error in 2nd P0733 53 Gear Ratio Error in 3rd 0734 54 Gear Ratio Error in 4th 0715 56 Input Speed Sensor Error 0720 57 Output Speed Sensor Error P1794 58 Speed Sensor Ground Error When monitored The transmission gear ratio is monitored continuously while the transmission is in gear Set condition This code is set if the gear ratiois not correct for a period of time Codes 50 through 54 sets if the ratio of the input RPM Nt to the output RPM No does not match the given gear ratio Code 56 sets if there is an excessive changein input RPM in any gear Code 57 sets if there is an excessive changein output RPM in any gear Code 58 sets after a PCM reset in neutral and Nt No equals a ratio of input to output of 2 50 A hard code sets within 3 seconds an intermit tent code sets within 15 seconds Theory of operation The transmission system uses two speed sensors one to measure input RPM and one to measure output RPM These inputs are 13 GENERAL INFORMATION essential for proper transmission operation There fore the integrity of this data is verified through the following checks 1 When in gear i
114. LY THROTTLE POSITION SENSOR SIGNAL SENSOR GROUND AUTOSTICK DOWN AUTOSTICK UP FUSED IGNITION SWITCH OUTPUT RUN START INPUT SPEED SENSOR SIGNAL FUSED IGNITION SWITCH OUTPUT SPEED SENSOR GROUND FUSED IGNITION SWITCH OUTPUT WITHOUT AUTOSTICK RUN START T41 SENSE SIGNAL C1 C4 37 42 SENSE SIGNAL C2 TRS T42 SENSE C2 9 P3L TRS SENSE C3 Lo gt T3 SENSE SIGNAL NDL TRS T1 SENSE C4 Lo o GEARS LISTED CLOSE SWITCH 1 SENSE SIGNAL C4 TRANSMISSION TEMPERATURE SENSOR OUTPUT SPEED SENSOR SIGNAL GROUND GROUND 4 35 TRANSMISSION TEMPERATURE SENSOR SIGNAL HALL EFFECT SWITCHES THROTTLE POSITION SENSOR AUTOSTICK SWITCH IF EQUIPPED FUSED IGNITION SWITCH OUTPUT RUN START 1 INPUT SPEED SENSOR FUSED IGNITION SWITCH OUTPUT RUN BACKUP LAMP FEED BACKUP LAMPS 197 80f336d3 5 H E M D G R 5 NOTES 198 CHARTS AND GRAPHS 11 0 CHARTS AND GRAPHS 11 1 TRANSMISSION RANGE SENSOR STATES 41TE TRANSMISSION RANGE SENSOR STATES TRS PARK T1 REVERSE T2 NEUTRAL T3 L T1 C4 OPEN OPEN OPEN CLOSED CLOSED CLOSED CLOSED CLOSED OPEN CLOSED CLOSED T3 C3 CLOSED CLOSED OPEN OPEN OPEN CLOSED CLOSED CLOSED CLOSE
115. M These inputs are received from the PCI bus periodically and used to initialize the oil temperature at start up Once the engine is started the PCM updates the trans mission oil temperature based on torque converter slip speed vehicle speed gear and engine coolant temperature to determine an estimated oil temper ature during vehicle operation Vehicles using cal culated oil temperature track oil temperature rea sonably accurate during normal operation However if a transmission is overfilled a transmis sion oil cooler becomes restricted or if a customer drives aggressively in low gear the calculated oil temperature will be inaccurate Consequently the shift schedule selected may be inappropriate for the current conditions The key highlights of the vari ous shift schedules are as folows Extreme Cold Oil temperature at start up below 26 6 C 16 F gt Goes to Cold schedule above 24 C 12 F oil temperature gt Park Reverse Neutral and 2nd gear only prevents shifting which may fail a clutch with frequent shifts Cold Oil temperature at start up above 24 C 12 F and below 2 2 C 36 F gt Goes to Warm schedule above 4 4 C 40 F oil temperature gt Delayed 2 3 upshift approximately 35 50 Km h 22 31 MPH gt Delayed 3 4 upshift 72 85 Km h 45 53 MPH gt Early 4 3 coastdown shift approximately 48 Km h 30 MPH gt Early 3 2 coastdown shift approximately 27 Km h 17 MPH gt High speed 4
116. MISSION TEMPERATURE SENSOR SIGNAL 36 37 T42 20VT WT TRS 742 SENSE 38 RIGHT BACKUP LAMP BLACK 2 WAY CAV CIRCUIT FUNCTION 1 21 20BK GROUND 2 L1 20VT BK BACKUP LAMP FEED RIGHT BACKUP LAMP 195 N N E R 4 2 CONNECTOR PINOUTS BLACK 3 1 THROTTLE POSITION SENSOR 2 0L NATURAL THROTTLE POSITION SENSOR N 2 4L TURBO T DK GRAY L R IA 5 1 P 10 6 TRANSMISSION 0 SENSOR 5 BLACK TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY THROTTLE POSITION SENSOR 2 0L BLACK 3 WAY CAV CIRCUIT FUNCTION 1 K167 20BR YL SENSOR GROUND 2 2 K22 200R DB TP SIGNAL 3 K6 20VT WT 5 VOLT SUPPLY THROTTLE POSITION SENSOR 2 4L TURBO NATURAL 3 WAY CAV CIRCUIT FUNCTION 1 K4 20BK LB SENSOR GROUND 2 K22 200R DB TP SIGNAL 3 K7 200R 5 VOLT SUPPLY TRANSMISSION RANGE SENSOR DK GRAY 10 WAY CAV CIRCUIT FUNCTION 1 F20 20WT FUSED IGNITION SWITCH OUTPUT RUN 2 3 13 20DB BK SPEED SENSOR GROUND 4 54 20VT PK TRANSMISSION TEMPERATURE SENSOR SIGNAL 5 6 L1 20VT BK BACKUP LAMP FEED 7 1 20LG BK TRS T1 SENSE 8 20VT TRS T3 SENSE 9 T42
117. N DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the 2 4 Pressure Switch Sense circuit from the appropriate terminal of special tool 8815 to the Transmission Solenoid Pressure Switch Assem bly harness connector 15 the resistance above 5 0 ohms Yes Repair the 2 4 Pressure Switch Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 112 TRANSMISSION NGC P0846 2 4 PRESSURE SWITCH SENSE CIRCUIT Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the 2 4 Pressure Switch Sense circuit Is the resistance below 5 0 ohms Yes Repair the 2 4 Pressure Switch Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harn
118. N POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Speed Sensor Ground circuit from the appropriate terminal of special tool 8815 to the Output Speed Sensor harness connector Is the resistance above 5 0 ohms Yes Repair the Speed Sensor Ground circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Output Speed Sensor harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the Output Speed Sensor Signal circuit 15 the resistance below 5 0 ohms Yes Repair the Output Speed Sensor Signal circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Output Speed Sensor harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connec
119. NAL 31 32 K118 20PK YL BATTERY TEMP SIGNAL 33 24 V37 20RDILG 2 0L S C SWITCH SIGNAL 35 K107 200R 2 0L NVLD SWITCH SIGNAL 35 107 180R 2 4L TURBO NVLD SWITCH SIGNAL 36 37 K31 20BR 2 0L FUEL PUMP RELAY CONTROL 37 K31 18BR 2 41 TURBO FUEL PUMP RELAY CONTROL 38 90 20TN STARTER RELAY CONTROL 194 CONNECTOR PINOUTS POWERTRAIN CONTROL MODULE C4 GREEN 38 WAY CAV CIRCUIT FUNCTION 1 60 18BR OVERDRIVE SOLENOID CONTROL 2 T59 18PK BK UNDERDRIVE SOLENOID CONTROL 3 4 5 6 T19 18WT 2 4 SOLENOID CONTROL 7 8 9 10 720 18LB LOW REVERSE SOLENOID CONTROL 11 12 Z13 16BK RD GROUND 13 14 713 16BK RD GROUND 15 71 20LG BK TRS T1 SENSE 16 3 20VT TRS T3 SENSE 10 17 18 715 2010 TRANSMISSION CONTROL RELAY CONTROL 38 19 716 16RD TRANSMISSION CONTROL RELAY OUTPUT 20 POWERTRAIN 21 CONTROL 22 T9 180R BK OVERDRIVE PRESSURE SWITCH SENSE MODULE C4 23 24 25 26 27 41 20BK WT TRS T41 SENSE 28 16 16RD TRANSMISSION CONTROL RELAY OUTPUT 29 50 18DG LOW REVERSE PRESSURE SWITCH SENSE 30 47 18YL BK 2 4 PRESSURE SWITCH SENSE 31 32 114 20LG WT OUTPUT SPEED SENSOR SIGNAL 33 52 20RD BK INPUT SPEED SENSOR SIGNAL 34 713 20DB BK SPEED SENSOR GROUND 35 54 20VT PK TRANS
120. ND 45 0 16RD WT FUSED B 46 16 16RD TRANSMISSION CONTROL RELAY OUTPUT 47 48 15 2010 TRANSMISSION CONTROL RELAY CONTROL 190 POWERT CONTROL MODUL RAIN EG CONNECTOR PINOUTS POWERTRAIN CONTROL MODULE C1 BLACK 38 WAY CAV CIRCUIT FUNCTION 1 2 3 4 5 6 7 8 9 711 18BK WT GROUND 10 11 F12 18DB WT 2 0L FUSED IGNITION SWITCH OUTPUT RUN START 11 F12 18DB RD 2 4L FUSED IGNITION SWITCH OUTPUT RUN START TURBO 12 20RD WT 2 0L AUTO IGNITION SWITCH OUTPUT OFF RUN START STICK 12 F11 20RD WT 2 0L EX FUSED IGNITION SWITCH OUTPUT RUN START CEPT AUTOSTICK 13 G7 20WT OR VEHICLE SPEED SIGNAL 14 G9 20GY BK BRAKE FLUID LEVEL SWITCH SENSE 15 55 18LB 2 4L TURBO TIP SOL CONTROL 16 17 K150 18DB YL 2 4L SURGE SOL CONTROL TURBO 18 212 18BK TN GROUND 19 20 G6 20GY OIL PRESSURE SIGNAL 21 22 K145 20BR OR AAT SIGNAL 23 K153 18LB 2 4L TURBO TIP SIGNAL 24 25 1020 2016 SCI RECEIVE PCM 26 06 20PKILB 2 0L SCI RECEIVE TCM 27 20VT WT 2 01 5 VOLT SUPPLY 27 18VT WT 2 4L TURBO 5 VOLT SUPPLY 28 K137 18DB GY 2 4L WASTEGATE SOL CONTROL TURBO 29 A14 18RD WT FUSED B 20 A41 16YL FUSED IGNITION SWITCH OUTPUT STA
121. NNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the L R Pressure Switch Sense circuit 15 the voltage above 0 5 volts Yes Repair the L R Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 10 104 TRANSMISSION NGC P0841 LR PRESSURE SWITCH SENSE CIRCUIT Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit in the Transmission Solenoid Pressure Switch Assembly harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 11 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Using the schematics as a guide inspect t
122. NOID CONTROL CIRCUIT OPEN OD SOLENOID CONTROL CIRCUIT SHORT TO GROUND OD SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE OD SOLENOID POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 95 TRANSMISSION NGC
123. Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the OD Solenoid Control circuit from the appropriate terminal of special tool 8815 to the Transmission Solenoid Pressure Switch Assem bly harness connector Is the resistance above 5 0 ohms Yes Repair the OD Solenoid Control circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 96 TRANSMISSION NGC P0760 OD SOLENOID CIRCUIT Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the OD Solenoid Control circuit Is the resistance below 5 0 ohms Yes Repair the OD Solenoid Control circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnec
124. O TCM OPEN GROUND CIRCUIT OPEN INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for P0706 Check Shifter Signal For Gear Ratio check and record all CVI s Most set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 148 TRANSMISSION NGC P1684 BATTERY WAS DISCONNECTED Continued ACTION APPLICABILITY Has the battery been disconnected lost it s c
125. ON Continued APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Transmission Control Module per the Service Infor mation WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 135 TRANSMISSION NGC Symptom P0897 WORN OUT BURNT TRANSAXLE FLUID EE When Monitored and Set Condition P0897 WORN OUT BURNT TRANSAXLE FLUID When Monitored With each transition from full Torque Convertor to partial Torque Convertor engagement for A C bump prevention Set Condition When vehicle shudder is detected during partial engagement PE MCC POSSIBLE CAUSES WORN OUT BURNT TRANSAXLE FLUID ACTION APPLICABILITY NOTE Low fluid level can be the cause of many trans
126. ON INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground the TRS 42 Sense circuit 15 the resistance below 5 0 ohms Yes Repair the TRS T42 Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 18 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the TRS T42 Sense circuit 15 the voltage above 0 5 volt Yes Repair the TRS T42 Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 19 48 TRANSMISSION NGC 706 SHIFTER SIGNAL Continued ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replac
127. OOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the OD Pressure Switch Sense circuit from the appropriate terminal of special tool 8815 to the Transmission Solenoid Pressure Switch Assem bly harness connector Is the resistance above 5 0 ohms Yes Repair the OD Pressure Switch Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 117 TRANSMISSION NGC P0870 OD HYDRAULIC PRESSURE TEST FAILURE Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the OD Pressure Switch Sense circuit 15 the resistance below 5 0 ohms Yes Repair the OD Pressure Switch Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair
128. P0884 POWER UP AT SPEED When Monitored When the Transmission Control Module initially powers up Note the Transmission Control Module is integrated with Powertrain Control Module The Trans mission Control Module has separate powers and grounds specifically to its portion of the PCM Set Condition This DTC will set if the TCM powers and senses the vehicle in a valid forward gear no PRNDL DTCs with a output speed above 800 RPM approximately 32K m h or 20 POSSIBLE CAUSES P0884 POWER UP AT SPEED ACTION APPLICABILITY This DTC is set when the PCM is initialized while the vehicle is moving down the All road in a valid forward gear This is usually a momentarily loss of power to the Transmission portion of the PCM CAUTION NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS NOTE Due to the integration of the Powertrain and Transmission Control Modules the transmission part of the PCM has its own specific power and ground circuits Check all of the Fused B Fused Ignition Switch Output and Ground circuits related to the PCM for an intermittent open or short to ground Perform a wiggle test on all wiring and connectors pertaining to the PCM while looking for shorts and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditi
129. PLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 77 TRANSMISSION NGC P0733 GEAR RATIO ERROR IN Continued ACTION APPLICABILITY With the DRBIII read Transmission If any of these DTC s are present perform their respective tests first Ar
130. PLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service Informa tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 94 TRANSMISSION NGC Symptom 760 SOLENOID CIRCUIT When Monitored and Set Condition P0760 OD SOLENOID CIRCUIT When Monitored Initially at power up then every 10 seconds thereafter Also tested immediately after a gear ratio or pressure switch error is detected Set Condition Three consecutive solenoid continuity test failures or one failure if test is run in response to a gear ratio or pressure switch error POSSIBLE CAUSES RELATED RELAY 5 PRESENT TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN OD SOLE
131. Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the read Transmission DTC s 15 the DTC P0733 and or P0871 present also Yes ReplacetheTransmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 4 With the DRBIII Check the STARTS SINCE SET counter for P0870 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 5 No GoTo 12 With the DRBIII check for other Transmission All Is the DTC P0944 present also 116 TRANSMISSION NGC P0870 OD HYDRAULIC PRESSURE TEST FAILURE Continued APPLICABILITY Turn the ignition off to the lock position All Remove the Starte
132. RBIII Check the STARTS SINCE SET counter for P0951 All Note This counter only applies to the last DTC set Is the Starts Since Set counter set at 0 Yes GoTo 2 GoTo 6 Turn the ignition off to the lock position Disconnect the AutoStick Switch harness connector Note Check connectors Clean repair as necessary Ignition on engine not running Measure the voltage of both the AutoStick Upshift and Downshift sense circuits 15 the voltage above 5 0 volts on both circuits Yes Replace the AutoStick Switch per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 141 TRANSMISSION NGC P0952 AUTOSTICK INPUT CIRCUIT LOW Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the AutoStick Switch harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and theAutoStick Downshift Sense circuit 15 the resistance below 5 0 ohms Yes Repair the AutoStick Downshift Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 4 Turn the ignition off t
133. RBIII monitor the AutoStick Switch status Firmly apply the brake and shift into AutoStick Push the shift lever to the right several times to actuate the AutoStick Upshift Switch and then tothe left several times to actuate the AutoStick Downshift Switch Do both AutoStick Upshift and Downshift Switch states toggle Yes Test Complete No Replace the Powertrain Control Module per the Service Informa tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR 174 TRANSMISSION NGC Symptom PRNDL FAULT CLEARING PROCEDURE POSSIBLE CAUSES PRNDL FAULT CLEARING PROCEDURE ACTION APPLICABILITY With the DRBIII erase Transmission DTCs All Cycle the ignition off then start the vehicle Firmly apply the brakes and shift into Overdrive NOTE Vehicle must remain in Overdrive for at least 3 0 seconds With the brakes firmly applied shift slowly through all gears PRNDL as least three times pausing momentarily in each gear NOTE If all the PRNDL lights box individually then the error was cleared Shift into park and turn the ignition off to the lock position Ignition on engine not running With the DRBIII read Transmission DTCs Does the DTC P0706 reset or do all the PRNDL indicators remain boxed in park or neutral Yes Return to the symptom list and perform diagnostics for P0706 CHECK SHIFTER SIGNAL Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test
134. REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 90 TRANSMISSION NGC Symptom 755 2 4 SOLENOID CIRCUIT When Monitored and Set Condition 0755 2 4 SOLENOID CIRCUIT When Monitored Initially at power up then every 10 seconds thereafter They will also be tested immediately after a gear ratio or pressure switch error is detected Set Condition Three consecutive solenoid continuity test failures or one failure if test is run in response to a gear ratio or pressure switch error POSSIBLE CAUSES RELATED RELAY 5 PRESENT TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN 2 4 SOLENOID CONTROL CIRCUIT OPEN 2 4 SOLENOID CONTROL CIRCUIT SHORT TO GROUND 2 4 SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE 2 4 SOLENOID POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then
135. RN AND REPROGRAM PINION FAC TOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 146 TRANSMISSION NGC P1652 SERIAL COMMUNICATION LINK MALFUNCTION Continued ACTION APPLICABILITY The conditions necessary to set the DTC are not present at this time All Make sure to check for any Communication DTCs or customer concerns of possible bus problems This includes any other controllers on the bus on this vehicle If there is a bus problem refer to the Communication Category for diagnosis With the DRBII1 check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 147 TRANSMISSION NGC Symptom P1684 BATTERY WAS DISCONNECTED E When Monitored and Set Condition P1684 BATTERY WAS DISCONNECTED When Monitored Whenever the ignition is in the Run Start position Set Condition This DTC is set whenever the Transmission Control Module TCM is disconnected from battery power B or ground It will also be set during the 2 Quick Battery Disconnect procedure Note Due to the integration of the Powertrain and Transmission Control Modules the transmission part of the PCM has its own specific power and ground circuits POSSIBLE CAUSES BATTERY WAS DISCONNECTED PCM WAS REPLACED OR DISCONNECTED QUICK LEARN WAS PERFORMED FUSED B CIRCUIT T
136. ROR When Monitored and Set Condition P0720 OUTPUT SPEED SENSOR ERROR When Monitored The transmission gear ratio is monitored continuously while the transmission is in gear Set Condition If there is an excessive change the Output RPM any gear POSSIBLE CAUSES OUTPUT SPEED SENSOR SIGNAL CIRCUIT OPEN SPEED SENSOR GROUND CIRCUIT OPEN OUTPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND OUTPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE OUTPUT SPEED SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start
137. RT 31 32 33 34 35 36 D21 20PK SCI TRANSMIT PCM 27 D15 20WT DG 2 01 SCI TRANSMIT TCM 28 D25 20VT YL PCI BUS PCM 191 N N E R 4 2 R 4 2 CONNECTOR PINOUTS ORANGE POWERT CONTROL MODUL RAIN EC2 2 0L POWERTRAIN CONTROL MODULE C2 2 0L ORANGE 38 WAY CAV CIRCUIT FUNCTION 1 2 3 4 5 6 7 8 9 K17 18DB TN COIL CONTROL NO 2 10 K19 18BK GY COIL CONTROL NO 1 11 K14 18LB BR INJECTOR CONTROL NO 4 12 13 18YL WT INJECTOR CONTROL NO 3 13 K12 18 INJECTOR CONTROL NO 2 14 11 18WT DB INJECTOR CONTROL NO 1 15 16 K200 20VT OR RT MTV CONTROL 17 K199 18BR VT 02 1 2 HEATER CONTROL 18 K99 18BR OR 02 1 1 HEATER CONTROL 19 K20 20DG GEN FIELD CONTROL 20 K2 20VT LG ECT SIGNAL 21 K22 200R DB TP SIGNAL 22 23 K1 20DG RD MAP SIGNAL 24 K45 20BK VT KS RETURN 25 K42 20DB LG KS SIGNAL 26 27 K4 20BK LB SENSOR GROUND 28 K961 20BR WT IAC RETURN 29 K7 200R 5 VOLT SUPPLY 30 K21 20BK RD IAT SIGNAL 31 K41 20BK DG 02 1 1 SIGNAL 32 904 20DB DG 02 RETURN 33 K141 20TN WT 02 1 2 SIGNAL 34 K44 20TN YL CMP SIGNAL 35 K24 20GY BK CKP SIGNAL 36 37 38 K610 20VT GY IAC MOTOR CONTROL 192
138. SWITCH OUTPUT T R U T 5 187 CONNECTOR PINOUTS GRAY 2 INPUT SPEED SENSOR GRAY 2 WAY CAV CIRCUIT FUNCTION 1 T13 20DB BK SPEED SENSOR GROUND INPUT 2 752 20RD BK INPUT SPEED SENSOR SIGNAL SPEED SENSOR LEFT BACKUP LAMP BLACK 2 WAY 2 CAV CIRCUIT FUNCTION 1 Z1 20BK GROUND 2 1 20VT BK BACKUP LAMP FEED LEFT BACKUP LAMP N N E GRAY 2 1 OUTPUT SPEED SENSOR GRAY 2 WAY CAV CIRCUIT FUNCTION R 1 T13 20DB BK SPEED SENSOR GROUND OUTPUT 2 114 20LG WT OUTPUT SPEED SENSOR SIGNAL SPEED SENSOR U T 5 188 RADIATOR FAN LOW RELAY 2 4L TURBO RADIATOR FAN HIGH RELAY 2 4L TURBO RADIATOR FAN RELAY 2 0L RADIATOR FAN CONTROL RELAY 2 4L TURBO CONNECTOR PINOUTS POWER DISTRIBUTION CENTER STARTER MOTOR RELAY AIC COMPRESSOR CLUTCH RELAY AUTOMATIC SHUT DOWN RELAY HORN RELAY TRANSMISSION CONTROL RELAY NOT USED MANIFOLD TUNING VALVE RELAY RT FUEL PUMP RELAY NOT USED HEADLAMP 2 5 IGN RUN 4 1 SPARE RAD FAN 6 9 STARTER ABS 11 SPARE EBL 1
139. TION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 158 TRANSMISSION NGC P1776 SOLENOID SWITCH VALVE LATCHED IN LR POSITION Continued APPLICABILITY With the DRBIII check for other transmission 5 All Is the DTC P0841 present also Y
140. The posi tion of the manual valve alone allows the three ranges that are available Although vehicle perfor mance is seriously degraded while in this mode it allows the owner to drive the vehicle in for service Once the DRBIII is in the Transmission portion of the diagnostic program it constantly monitors the PCM to see if the system is in Limp in mode If the transaxle 15 Limp in mode the 2 will flash the red LED 3 2 1 AUTOSTICK FEATURE IF EQUIPPED This feature allows the driver to manually shift the transaxle when the shift lever is pulled into the AutoStick position When in AutoStick mode the instrument cluster displays the current gear 3 2 2 TRANSMISSION OPERATION AND SHIFT SCHEDULING AT VARIOUS OIL TEMPERATURES The transmission covered in this manual has unique shift schedules depending on the tempera ture of the transmission oil The shift schedule is modified to extend the life of the transmission while operating under extreme conditions The oil temperature is measured with a Temper ature Sensor on thetransmission The Temperature Sensor is an integral component of the Transmis sion Range Sensor TRS If the Temperature Sen sor is faulty the transmission will default to a calculated oil temperature Oil temperature will then be calculated through a complex heat transfer equation using engine coolant temperature battery ambient temperature and engine off time from the Body Control Module BC
141. UICK LEARN oo sps024 set ess Hee 18 3210 CLUTCH VOLUMES 2062s ones Re 19 3 3 11 ELECTRONIC PINION FACTOR IF APPLICABLE 19 34 USING THE 545554965 19 3 5 DRBII ERROR MESSAGES 4255351 19 3 5 1 DRBIII2 DOES POWER UP BLANK SCREEN 20 3 5 2 DISPLAY IS NOT VISIBLE eerie bd oe tion 20 3 5 3 SOME DISPLAY ITEMS READ 20 3 6 TRANSMISSION SIMULATOR MILLER TOOL 8333 AND ELECTRONIC TRANSMISSION ADAPTER KIT MILLER TOOL 8333 1A 20 DISCLAIMERS SAFETY AND WARNINGS 20 4 1 DISCLAIMERS 554555555556 Sues yard fee See anes ewes 20 SAFETY eee ee eye eae ees eee tees 20 4 2 1 TECHNICIAN SAFETY 20 4 2 2 VEHICLE PREPARATION FOR 5 21 423 SERVICING SUB ASSEMBLIES 21 42 4 SAFETY 1 21 4 3 WARNING Sc andes Dika pini Geena Teese 21 431 VEHICLE DAMAGE 5 21 4 3 2 ROAD TEST COMPLAINT 22 4 3 3 ELECTRONIC PINION
142. With the DRBIII read Transmission DTCs NOTE The Engine must run for at least 20 seconds to reset this DTC Did the DTC reset after the engine was started Yes GoTo 2 No GoTo Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service I nforma WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Make sure to check for any Communication DTCs or customer concerns of possible bus problems This includes any other controllers on the bus on this vehicle If there is a bus problem refer to the Communication Category for diagnosis With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 153 TRANSMISSION NGC Symptom P1775 SOLENOID SWITCH VALVE LATCHED IN TCC POSITION When Monitored and Set Condition P1775 SOLENOID SWITCH VALVE LATCHED IN TCC POSITION When Monitored During an attempted shift into 1st gear Set Condition This DTC is set if three unsuccessful attempts are made
143. above 5 0 ohms Yes Repair the TRS T1 Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the TRS T1 Sense circuit 15 the resistance below 5 0 ohms Yes Repair the TRS T1 Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Remove the Transmission Control Relay from the PDC Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit the Transmission Control Relay connector Ignition on engine not running Measure the voltage of the TRS T1 Sense circuit at the appropriat
144. al error Theory of operation The PCM is constantly monitoring its internal processor If an internal problem is detected this DTC will beset This DTC can also be set by a bad ground to the PCM and or Trans Control Relay Transmission Effects The MIL will illuminate this DTC can take up to five minutes of problem identification before illuminating the MIL and the transmission system will default to the Immediate Shutdown routine Possible causes gt PCM ground circuit gt Relay ground circuit gt PCM Name of code P1684 12 Battery was Discon nected Informational code Only When monitored Whenever the key is in the Run Start position Set condition This codeis set whenever the PCM is disconnected from battery power B or ground It will also be set during the DRBIII Battery Disconnect procedure Theory of operation A battery backed RAM Random Access Memory is used to maintain some learned values When the battery B is discon nected the memory is lost When the B is restored this memory loss is detected by the PCM The code is set and the learned values are initial ized to known constants or previously learned values from EEPROM Electronic Erasable Pro grammable Read Only Memory This results in the reinitialization of some parameters Transmission Effects Loss of trouble code data Immediate Limp in mode if power is lost while operating the vehicle Normal operation is re sumed if
145. ansmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 62 TRANSMISSION NGC 0715 SPEED SENSOR ERROR Continued ACTION APPLICABILITY Start the engine Place the shifter in park With the DRBIII read the Input Speed Sensor RPM 15 the Input Speed Sensor reading below 400 RPM Yes GoTo 3 No GoTo 11 Turn
146. ant that accurate shift lever position data be available to the PCM The accuracy of any DTC found in memory is doubtful unless the Shift Lever Test performed the DRBIII Scan Tool passes without failure 4 2 3 SERVICING SUB ASSEMBLIES Some components of the Transmission system are intended to be serviced in assembly only At tempting to remove or repair certain system sub components may result in personal injury and or improper system operation Only those compo nents with approved repair and installation proce dures in the service information should be ser viced 4 2 4 DRBIII SAFETY INFORMATION WARNING EXCEEDING THE LIMITS OF THE DRBIII MULTIMETER IS DANGEROUS CAN EXPOSE YOU TO SERIOUS OR POSSIBLY FATAL INJURY CAREFULLY READ AND UNDERSTAND THE CAUTIONS AND THE SPECIFICATION LIMITS e Follow the vehicle manufacturer s service speci fications at all times Do not use the DRBIII if it has been damaged Do not use the test leads if the insulation is damaged or if metal is exposed To avoid electrical shock do not touch the test leads tips or the circuit being tested 21 GENERAL INFORMATION e Choose the proper range and function for the measurement Do not try voltage or current measurements that may exceed the rated capac ity Do not exceed the limits shown in the table FUNCTION INPUT LIMIT Volts 500 volts peak AC 500 volts DC Ohms resistance 0 1 12 mego
147. any Engine TPS DTCs present Yes Refer to the Powertrain category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 3 31 TRANSMISSION NGC P0123 THROTTLE POSITION SENSOR APPS HIGH Continued ACTION APPLICABILITY With the 119 record the EATX EVENT DATA to help identify the conditions All which the DTC was set With the DRBIII erase Transmission DTCs NOTE To erase EATX EVENT DATA information BATTERY DISCONNECT must be performed Performing a BATTERY DISCONNECT will reset all learned Transmission values to controller defaults which may lead to erratic shift schedules Drive the vehicle and try to duplicate the conditions in which the DTC was reported by the EATX EVENT DATA With the DRBIII read Transmission DTCs Did the DTC P0123 THROTTLE POSITION SENSOR HIGH reset Yes GoTo 4 GoTo 5 NOTE Due to the integration of the Powertrain and Transmission Control Modules communication between the modules is internal Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to
148. applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 50 TRANSMISSION NGC PO711 TRANSMISSION TEMPERATURE SENSOR PERFORMANCE Continued ACTION APPLICABILITY With the DRBIII check Transmission All Are there any other Transmission Temperature Sensor related DTCs present Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P0711 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 No GoTo 7 Turn the ignition off to the lock position Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the Input Output switch to OFF With the DRBII monitor the TRANS TEMP VOLTS while turning the Thermistor Voltage switch to all three positions on the Transmission Simulator Compare the DRBIII readings with the numbers listed on the Transmission Simulator Do the readings on the Transmission Simulator match the DRBIII
149. ator Lamp MIL Although these DTC s will be stored in the PCM immediately asa 1 trip failure it may take up to five minutes of accumulated trouble confirmation to set the DTC and illuminate the MIL Three consecutive success ful OBDII EURO STAGE 111 OBD trips or clearing the DTC s with a diagnostic tool DRBIII or equiv alent is required to extinguish the MIL When the Transmission Control system requests that the PCM illuminate the MIL the PCM sets a DTC P0700 89 to alert the technician that there DTC s in the Transmission Control System This must also be erased in the PCM in order to extin guish the MIL 3 3 1 HARD CODE Any Diagnostic Trouble Code DTC that is set whenever the system or component is monitored is a HARD code This means that the problem is there every timethe Transmission Control System checks that system or component Some codes will set immediately at start up and others will require a road test under specific conditions It must be determined if a code is repeatable Hard or inter mittent before attempting diagnosis 3 3 2 ONE TRIP FAILURES A One Trip Failure when read from the Trans mission Control System is a hard EURO STAGE OBD code that has not matured for the full 5 minutes to a hard fault This applies to codes that will only set after 5 minutes of substituted gear operation GENERAL INFORMATION 3 3 3 INTERMITTENT CODE A diagnostic trouble code that is not
150. ay connector Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit in the appropriate terminal of special tool 8815 NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 10 No Replace the Transmission Control Relay Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 128 TRANSMISSION NGC PO888 RELAY OUTPUT ALWAYS OFF Continued ACTION APPLICABILITY The conditions necessary to set the DTC are not present at this time All Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete
151. begin by performing a visual inspection of the wiring connectors cooler lines and the trans mission Any obvious wiring problems or leaks should be repaired prior to performing any diagnos tic test procedures Some engine driveability prob lems can be misinterpreted as a transmission prob lem Ensure that the engine is running properly and no engine DTC s are present that could cause transmission complaint GENERAL INFORMATION If there is a communication bus problem trouble codes will not be accessible until the problem is fixed The DRBIII will display an appropriate message The following is a possible list of causes for a bus problem open or short to ground battery in PCI bus circuit internal failure of any module or component on the bus Each diagnostic trouble code is diagnosed by following a specific testing sequence The diagnostic test procedures contain step by step instructions for determining the cause of a transmission diag nostic trouble code Possible sources of the code are checked and eliminated one by one It is not neces sary to perform all of the tests in this book to diagnose an individual code These tests are based on the problem being present at the time that the test is run All testing should be done with a fully charged battery If the PCM records a DTC that will adversely affect vehicle emissions it will request via the communication bus that the PCM illuminate the Malfunction Indic
152. check the Backup Lamp Supply circuit in both Backup Lamp sockets while pressing the Reverse Light Test button on the Transmission Simulator Does the test light illuminate brightly on either Backup Lamb Bulb socket Yes Repair the Backup Lamp Ground circuit for an open No Repair the Backup Lamp Supply circuit for an open 170 TRANSMISSION NGC Symptom CHECKING PARK NEUTRAL SWITCH OPERATION POSSIBLE CAUSES P N POSITION SWITCH SENSE CIRCUIT OPEN P N POSITION SWITCH SENSE CIRCUIT SHORT TO GROUND TRANSMISSION RANGE SENSOR POWERTRAIN CONTROL MODULE ACTION APPLICABILITY Ignition on engine not running All With the DRBIII monitor the Park Neutral Position Switch input state Move the gear selector through all gear positions Park to 1 and back to Park Did the DRBIII display show P N and D R in the correct gear positions Yes Test Complete No GoTo 2 Turn the ignition off to the lock position Disconnect the PCM harness connectors Disconnect the TRS harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the P N Position Switch Sense circuit from the appropriate terminal of special tool 8815 to the Transmission Range Sensor harness connector
153. conditions necessary to set this DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 55 TRANSMISSION NGC Symptom P0O713 TRANSMISSION TEMPERATURE SENSOR HIGH When Monitored and Set Condition P0713 TRANSMISSION TEMPERATURE SENSOR HIGH When Monitored Continuously with the ignition on and engine running Set Condition The DTC will set when the monitored Temperature Sensor voltage rises above 4 94 volts for the period of 0 45 seconds POSSIBLE CAUSES RELATED PRESENT TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE TRANSMISSION TEMPERATURE SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine
154. cord all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 144 TRANSMISSION NGC P0992 2 4 OD HYDRAULIC PRESSURE TEST FAILURE Continued ACTION APPLICABILITY NOTE The vehicle must be driven to set this DTC Thetransmission must be All warm or hot with the Engine RPM above 1000 RPM This DTC is an indication of both the 2 4 and the O D Hydraulic Pressure Switch DTCs present Perform diagnostics for both P0870 and P0845 to determine which switch is failing With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set If there no possible causes remaining view repair Repair Refer tothe Transmission category and perform the symptoms for P0845 and P0870 Perform 41TE NGC TRANSMISSION
155. ctor is stored in an installed PCM the vehicle speedometer will not oper ate engine speed will be limited to 2300 RPM and catalyst damage may occur gt Selecting a wrong tire size will cause the speedometer to be inaccurate and will also cause any speed related features to operate improperly NOTE After replacing the PCM you must reprogram pinion factor 3 4 USING THE DRBIII Refer to the DRBIII user s guide for instruc tions and assistance with reading trouble codes erasing trouble codes and other DRBIII func tions DISPLAY DRB III REPLACEABLE LENS FUNCTION 5 5 552 LEDs ARROW KEYS CONTRAST OP with YES key BACK LIGHTING with YES key KEYPAD SHIFT KEY LED 80b57566 3 5 DRBIII ERROR MESSAGES Under normal operation the DRBIII will dis play one of only two error messages User Requested WARM Boot User Requested COLD Boot GENERAL INFORMATION If the DRBIII should display any other error message record the entire display and call the S T A R Center 3 5 1 DRBIII DOES POWER UP BLANK SCREEN If the LED s do not light or no sound is emitted at start up check for loose cable connections or a bad cable Check the vehicle battery voltage A mini mum of 11 volts is required to adequately power the DRBIII If all connections are proper between the DRBIII and the vehicle or other devices and the ve
156. e 135 C 275 F or Engine coolant temperature above 124 C 255 F gt Goes back to Overheat below 124 C 255 oil temperature gt AutoStick feature is disabled gt DTC P1797 is set Causes for operation in the wrong tempera ture shift schedule Extreme Cold or Cold shift schedule at start up gt Temperature Sensor circuit gt Overheat or Super Overheat shift schedule after extended operation gt Operation in city traffic or stop and go traffic gt Engine idle speed too high gt Aggressive driving in low gear gt Trailer towing in OD gear position use position or A S 3rd if frequent shifting curs gt Cooling system failure causing engine to op erate over 110 C 230 F gt Enginecoolant temperature stays low too long If engine coolant temperature drops below 65 150 F the transmission will disengage EMCC Extended operation with the EMCC disengaged will cause the transmission to overheat gt Brake switch issue will cause the EMCC to disengage Extended oepration with the EMCC disengaged will cause the transmis sion to overheat gt Tranmission fluid overfilled gt Transmission cooler or cooler lines restricted gt Transmission Temperature Sensor circuit 3 3 DIAGNOSTIC TROUBLE CODES Diagnostic trouble codes DTC s are codes stored by the Powertrain Control Module PCM that help us diagnose Transmission problems They are viewed using the 2 scan tool Always
157. e Transmission Control Relay Output circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 127 TRANSMISSION NGC P0888 RE LAY OUTPUT ALWAYS OFF Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the Transmission Control Relay Control circuit Is the resistance below 5 0 ohms Yes Repair the Transmission Control Relay Control circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between the Fused circuit and the Transmission Control Relay Output circuit in the Transmission Control Rel
158. e appropriate terminal of special tool 8815 to the Transmission Solenoid Pressure Switch Assem bly harness connector Is the resistance above 5 0 ohms Yes Repair the L R Pressure Switch Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the L R Pressure Switch Sense circuit 15 the resistance below 5 0 ohms Yes Repair the L R Pressure Switch Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CO
159. e between 35 and 83 The 2 4 clutch volume is updated when doing a 1 2 shift The transmission temperature must be above 43 C 110 F The clutch volume should be between 20 and 77 The OD clutch volume is updated when doing a 2 3 shift The transmission temperature must be above 43 C 110 F The clutch volume should be between 40 and 150 The UD clutch volume is updated when doing a 4 3 or 4 2 shift The transmission temperature must above 43 C 110 F The clutch volume should be between 24 and 70 Transmission effects These codes usually set with other DTC s which indicates internal transmission problem Possible causes gt Clutch pack clearance out of spec gt Snap ring out of position or broken gt Broken return spring gt Hydraulic leak into clutch circuit with near zero volume 3 3 11 ELECTRONIC PINION FACTOR IF APPLICABLE Using the following steps the pinion factor can be checked and or reset using the DRBIII GENERAL INFORMATION 1 Select Transmission system then Miscella neous functions then Pinion Factor The DRBIII will display the current tire size 2 If the tire size is incorrect press the Enter key and then select the correct size 3 Press the Page Back key to exit the reset proce dure Notes About Electronic Pinion Factor F eatures The nature of the electronic pinion factor requires that certain features must be taken into consider ation gt If no pinion fa
160. e terminal of special tool 8815 15 the voltage above 0 5 volt Yes Repair the TRS T1 Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 19 45 TRANSMISSION NGC 706 SHIFTER SIGNAL Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the TRS T3 Sense circuit from the appropriate terminal of special tool 8815 to the TRS harness connector Is the resistance above 5 0 ohms Yes Repair the TRS T3 Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 11 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the TRS T3 Sense circuit
161. e the Powertrain Control Module the Service Informa tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 If there are no possible causes remaining view repair Repair Adjust the Shift Linkage and or cable per the Service nformation Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits Check the Shift Linkage and cable for proper operation per the Service Information With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Perform PRNDL FAULT CLEARING PROCEDURE after completion of any repairs Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 49 TRANSMISSION NGC Symptom PO711 TRANSMISSION TEMPERATURE SENSOR PERFORMANCE When Monitored and Set Condition PO711 TRANSMISSION TEMPERATURE SENSOR PERFORMANCE When Monitored Continuously with the ignition on and engine running Set Condition This DTC will set when the desired transmission temperature does not reach a normal operating temperature within a given time frame Time is variable due to ambient
162. e there any Loss of Prime Line Pressure Sensor and or Speed Sensor DTCs present Yes Refer to appropriate symptom the Transmission category If any of these are present they will cause a gear ratio error Perform the test for Loss of Prime DTC first if it is present Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII perform the 3rd Gear Clutch test Follow the instructions on the DRBIII Increase the throttle angle or TPS Degree to 30 for no more than a few seconds CAUTION Do not overheat the transmission Did the dutch test pass Input Speed remain at zero Yes GoTo 4 GoTo 5 The conditions to set this DTC are not current at this time All Check the gearshift linkage adjustment Gear ratio DTC s can be set by problems in the input and output speed sensor circuits If the vehicle passes the clutch test and still sets gear ratio 5 check the Speed Sensors for proper operation Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Check the speed sensor wiring and connectors for good connection then perform a wiggle test using the Transmission Simulator Miller tool 8333 and the Electronic Transmission Adapter kit 8333 1A This DTC can also be set under extreme temperature conditions this is usually caused by an internal problem Verify if the problem i
163. econds POSSIBLE CAUSES RELATED TPS ENGINE DTC S PRESENT POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for P0706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 With the DRBIII check Engine DTC s this includes all trip failures Are there
164. ector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit in the Solenoid Pressure Switch Assembly harness connector NOTE The Test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 7 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 159 TRANSMISSION NGC P1776 SOLENOID SWITCH VALVE LATCHED IN LR POSITION Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the L R Pressure Switch Sense circuit from the Pinout Box to the Transmission Solenoid Pressure Switch As
165. ed ACTION APPLICABILITY With the DRBIII read Transmission DTC s Are the DTC s P0750 and or P0841 present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 Ignition on engine not running With the DRBIII record and erase Drive the vehicle until it is fully warmed up At least 110 degrees Perform the following step 3 times Drive the vehicle at 50 MPH and allow 4th gear to engage for at least 10 seconds Close the throttle then tip back in until the throttle angle is between 25 and 29 degrees Note that if you go over 30 degrees you must back off of the throttle and retry Did the TCC engage during any of the attempts Yes GoTo 4 GoTo 5 The conditions necessary to set the DTC are not present at this time All Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits This DTC can also be set under extreme temperature conditions this is usually caused by an internal problem Verify if the problem is only experienced under extreme hot or cold conditions With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST
166. ed Then the transmission will go into Limp in mode if throttle is applied below 72 Km h 45 MPH or at 35 Km h 22 MPH with closed throttle Codes 51 52 53 54 56 and 57 at speeds between 35 and 72 Km h 22 and 45 MPH If one of these codes is set between 35 and 72 Km h 22 and 45 MPH the current gear will be maintained until the gear ratio problem corrects itself If throttle is applied the trans mission will go to 2nd gear If this happens and the gear ratio problem goes away normal operation will resume If three gear ratio problems are identified in a given key start the current gear will be frozen until throttleis applied The transmission will then go into Limp in mode with throttle applied at speeds between 35 and 72 Km h 22 and 45 MPH Codes 51 52 53 54 56 and 57 at speeds below 35 Km h 22 MPH If a gear ratio problem is identified below 35 Km h 22 GENERAL INFORMATION MPH the transmission will immediately substitute second gear for the current gear If the gear ratio problem goes away normal operation will resume If three gear ratio problems are identified in a given key start the transmission will go into Limp in mode Possible causes Code 0736 50 Excludes geartrain failures which should be obvious upon disassembly gt code P0944 35 is also set follow diagnostic procedure for code P0944 35 first gt Valve body 1 ball check or LR switch valve sticking may also set code 0731
167. ed most of the time without the code recurring 3 3 5 TROUBLE CODE ERASURE A Diagnostic trouble code will be cleared from Transmission Control System memory if it has not reset for 40 warm up cycles warm up cycle is defined as sufficient vehicle operation such that the coolant temperature has risen by at least 22 C 40 F from engine starting and reaches a minumum temperature of 71 C 160 F The Malfunction Indicator Lamp MIL will turn off after 3 good trips or when the 5 are cleared from the Transmission Control System 3 3 6 EATX DTC EVENT DATA EATX DTC EVENT DATA can be used as a diagnostic aid when experiencing Electronic Trans missions with intermittent problems When a Diag nostic Trouble Code DTC is set the vehicles EATX inputs are stored in the controller memory and are retrievable with the DRBII1 This information can be helpful when a DTC can not be duplicated The EATX DTC EVENT DATA is located in the DRBIII under the Transmission system menu in the sub screen Miscellaneous It is a good practice to document the EATX DTC EVENT DATA before beginning any diagnostic or service procedure A thorough understanding of how the transmis sion works is beneficial in order to interpret the data correctly These skills are necessary in order to avoid an incorrect diagnosis A MASTERTECH video and reference book was produced in J anuary 2002 that explains many of the features of the EATX DTC EVENT DATA
168. edure prior to Symptom diagnosis Continue GoTo 2 138 TRANSMISSION NGC P0944 LOSS OF PRIME Continued ACTION APPLICABILITY Place the gear selector in park Start the engine NOTE The TRANS TEMP DEG must be at least 43 C or 110 F before performing the following steps The Transmission must be at operating temperature prior to checking pressure A cold Transmission will give higher readings Place the Transmission in Reverse With the DRBIII observe the Transmission Pressure Switch states Are any of the Pressure Switches closed Yes GoTo 3 GoTo 5 The conditions necessary to set this DTC are not present at this time Test drive the vehicle Allow the Transmission to shift through all gears and ranges Did you experience a delayed engagement and or a no drive condition Yes GoTo 5 GoTo 4 With the DRBIII perform a Shift Lever Position test F ollow the instructions on the DRBIII Did the Shift Lever Position Test pass Yes GoTo 6 No Refer to symptom list and perform test for DTC P0706 Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Remove and inspect the Transmission Oil Pan and Transmission Oil Filter per the Service Information Does the Transmission Oil Pan contain excessive debris and or is the Oil Filter plugged Yes Repair the cause of the plugged Transmission Oil Filter Refer to the Service Information for the proper repair procedure
169. edure prior to Symptom diagnosis Continue GoTo 2 37 TRANSMISSION NGC P0562 LOW BATTERY VOLTAGE Continued ACTION APPLICABILITY With the DRBIII read the Engine All Are there any Charging System related DTC s present also Yes Refer to the Charging System category and repair any PCM Charging System 5 before testing DTC P0562 NOTE After repairing the PCM Charging System perform the Trans mission Verification test to verify the transmission was not damaged Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 NOTE Generator battery and charging system must be fully functional before performing this test With the DRBIII read Transmission With the DRBIII Check the STARTS SINCE SET counter for P0562 Note This counter only applies to the last DTC set Is the STARTS SINCE SET counter set at 0 Yes GoTo 4 GoTo 9 Turn the ignition off to the lock position Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Using a 12 volt test light connected to 12 volts check the Ground circuits in the appropriate terminal of special tool 8815 NOTE The test light must illumina
170. ely after a shift into 1st 2nd or 3rd gear with engine speed above 1000 RPM the PCM momentarily turns on element pressure to the 2 4 and or OD dutch circuits to identify that the appropriate pressure switch closes If the pressure switch does not close it is tested again the switch does not close the second time the appropriate code is set Theory of operation The PCM tests the OD and 2 4 pressure switches when they are off OD and 2 4 are tested in 1st gear OD in 2nd gear and 2 4 in 3rd gear The test verifies that the switches are operational The PCM verifies that the switch closes when the corresponding element is applied If a switch fails to close it is retested If it fails the second test the code is set Transmission Effects The MIL illuminates and the transmission system defaults to Limp in mode Possible causes gt Pressure switch sense circuit shorted to battery between PCM and solenoid pack gt Low line pressure gt Solenoid Pressure Switch assembly PRESSURE SWITCH STATES SWITCHES L R OPEN CLOSED CLOSED OPEN OPEN CLOSED 2 4 CLOSED CLOSED 80d9d3b5 Name of code P0944 35 Loss Of Prime When monitored the transmission is slipping in any forward gear and the pressure switches are not indicating pressure a loss of prime test is run Set condition fthetransmission begins toslipin any forward gear and the pressure s
171. ensor Circuit NOTE This code is not a Transmission Input Speed Sensor DTC When monitored Whenever the engine is run ning Set condition This code is set when the engine speed sensed by the PCM is less than 390 RPM or greater than 8000 RPM for more than 2 0 seconds Theory of operation The PCM uses a new dual port RAM internal to the controller to send the Crank Sensor signal to the Transmission Control System If the PCM interprets this signal to be out of range when the engine 15 running the code is set Transmission Effects The MIL illuminates and the transmission system defaults to Limp in mode Possible causes gt Engine DTC engine rpm related present gt PCM Name of code P1694 19 Bus Communication with Engine Module GENERAL INFORMATION When monitored Continuously with key on Set condition If no bus messages are re ceived from the Powertrain Control Module PCM for 10 seconds Theory of operation The PCM uses a new dual port RAM internal to the controller to communi cate with the Transmission Control System The Transmission Control System relies on certain en gine information to function properly The Trans mission Control System continuously monitors the internal engine bus to check for messages broad cast from the PCM Transmission Effects Delayed 3 4 shifts No EMCC and early 3 4 shifts for a few minutes after engine is started Possible causes gt PCM Name of c
172. ent perform their respective tests first Are there any Loss of Prime Line Pressure Sensor and or Speed Sensor DTCs present Yes Refer the Transmission category and perform the appropriate symptom any of these DTC s are present they will cause a gear ratio error Perform the test for Loss of Prime first if it is present Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII perform the 4th gear clutch test Follow the instructions on the DRBIII Increase the throttle angle or TPS Degree to 30 for no more than a few seconds CAUTION Do not overheat the transmission Did the dutch test pass Input Speed remain at zero Yes GoTo 4 GoTo 5 The conditions to set this DTC are not current at this time All Check the gearshift linkage adjustment Gear ratio DTC s can be set by problems in the Input and Output Speed Sensor circuits If the vehicle passes the clutch test and still sets gear ratio 5 check the Speed Sensors for proper operation Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Check the Speed Sensor wiring and connectors for good connection then perform a wiggle test using the Transmission Simulator Miller tool 8333 and the Electronic Transmission Adapter kit 8333 1A This DTC can also be set under extreme temperature conditions this is usuall
173. epair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 113 TRANSMISSION NGC 846 2 4 PRESSURE SWITCH SENSE CIRCUIT Continued APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service nforma tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 114 TRANSMISSION NGC Symptom 870 HYDRAULIC PRESSURE TEST FAILURE When Monitored and Set Condition P0870 OD HYDRAULIC PRESSURE TEST FAILURE When Monitored In any forward gear with engine speed above 1000 RPM shortly after a shift and
174. er and ground circuits there no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service I nforma tion WITH THE DRBIII PERFORM QUICK LEARN Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set this DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 61 TRANSMISSION NGC Symptom 715 SPEED SENSOR ERROR E When Monitored and Set Condition P0715 INPUT SPEED SENSOR ERROR When Monitored The transmission gear ratio is monitored continuously while the transmission is in gear Set Condition If there is an excessive change the Input RPM in any gear POSSIBLE CAUSES INPUT SPEED SENSOR SIGNAL CIRCUIT OPEN SPEED SENSOR GROUND CIRCUIT OPEN INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE INPUT SPEED SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many tr
175. er to run Good Trip timein each gear this will confirm the repair and to ensure that the DTC has not re matured 14 Check for Diagnostic Trouble Codes DTC s during the road test If a DTC sets during the road test return to the Symptom list and perform the appropriate symptom 15 NOTE Erase P0700 DTC in the PCM to turn the MIL light off after making transmission repairs Were there any Diagnostic Trouble Codes set during the road test Yes Repair is not complete refer to the appropriate symptom No Repair is complete 179 NOTES 180 COMPONENT LOCATIONS 8 0 COMPONENT LOCATIONS 8 1 AUTOSTICK IF EQUIPPED AUTOSTICK GEARSHIFT MECHANISM 1 4 i GEARSHIFT HANDLE L T N 5 80811098 8 2 POWERTRAIN CONTROL MODULE RADIATOR POWERTRAIN 6 7302 8 3 PRESSURE PORT OVERDRIVE TORQUE LOW REVERSE CLUTCH___CONVERTER OFF 5 i E UNDERDRIVE REVERSE CLUTCH CLUTCH 2 4 CLUTCH 80a676df 181 COMPONENT LOCATIONS 8 4 TRANSMISSION COMPONENT LOCATIONS INPUT SPEED SENSOR OUTPUT SPEED SENSOR LO ae 2 TRANSMISSION SOLENOID TRANSMISSION PRESSURE SWITCH ASSEMBLY RANGE SENSOR 8007175 L T N 5 182 CONNECTOR PINOUTS 9 0 CONNECTOR PINOUTS
176. erature conditions this is usually caused by an internal problem Verify if the problem is only experienced under extreme hot or cold conditions With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete If there are no possible causes remaining view repair Repair Repair internal transmission per the Service Information Check all of the components related to the Reverse and LR dlutches Inspect the Oil Pump and repair or replace per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 84 TRANSMISSION NGC Symptom 740 CONVERTER CLUTCH CONTROL CIRCUIT When Monitored and Set Condition P0740 TORQUE CONVERTER CLUTCH CONTROL CIRCUIT When Monitored The Torque Converter Clutch TCC is in FEMCC or PEMCC Trans mission temperature is hot Engine temperature is greater than 38 C or 100 F Transmission Input Speed greater than 1750 RPM TPS less than 30 Set Condition The TCC is modulated by controlling the duty cycle of the L R Solenoid until the difference between the Engine the Transmission Input Speed RPM or duty cycle is within a desired range The DTC is set after the period of 10 seconds and 3 occurrences of either FEMCC with slip greater than 100 RPM or PEMCC duty cycle
177. erform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 164 TRANSMISSION NGC P1794 SPEED SENSOR GROUND ERROR Continued ACTION APPLICABILITY Turn the ignition off to the lock position Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the Transmission Simulator set the Input Output Speed switch to and the rotary switch to the 3000 1250 position With the DRBIII monitor the Input and Output Speed Sensor readings Does the Input Speed read 3000 RPM and the Output Speed read 1250 RPM 50 RPM Yes GoTo 3 GoTo 4 The conditions necessary to set the DTC are not present at this time All Using the schematics as a guide inspect the wiring and connectors
178. es Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P1776 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 No GoTo 11 Turn the ignition off to the lock position CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the Transmission Simulator turn the Pressure Switch selector switch to L R With the DRBIII monitor the L R Pressure Switch State while pressing the Pressure Switch Test button on the Transmission Simulator Did the Pressure Switch state change from open to closed when test button was pressed Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Repair Internal Transmission as necessary Inspect the Solenoid Switch Valve the Service Information and repair or replace as necessary If no problems are found replace the Transmission Solenoid Pressure Switch Assembly Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness conn
179. ess connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the 2 4 Pressure Switch Sense circuit 15 the voltage above 0 5 volts Yes Repair the 2 4 Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit in the Transmission Solenoid Pressure Switch Assembly harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 10 No R
180. every minute thereafter Set Condition After a shift into a forward gear with engine speed greater than 1000 RPM the TCM momentarily turns on element pressure to the clutch circuits that don t have pressure identify the correct pressure switch closes If the pressure switch does not close 2 times the DTC sets POSSIBLE CAUSES LOSS OF PRIME P0944 PRESENT TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND OD PRESSURE SWITCH SENSE CIRCUIT OPEN OD PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY INTERNAL TRANSMISSION POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS 115 TRANSMISSION NGC P0870 OD HYDRAULIC PRESSURE TEST FAILURE Continued APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary
181. f the gear ratio does not compare known gear ratio the corresponding in gear trouble code is set codes 50 through 54 2 An excessive change in input or output speeds indicating signal intermittent will result in codes 56 and or 57 being set 3 After a PCM reset in neutral observing erratic output and input speed sensor signals indicates a loss of the common speed sensors ground This sets a code 58 Transmission Effects The transmission will not go into Limp in mode until three gear ratio error events occur in a given key start alsothe MIL will illuminate after 5 minutes of substituted opera tion This allows for intermittent problems to cor rect themselves without opening the relay How ever if a gear ratio error develops a code is always set but if the condition corrects itself the transmis sion will continue without requiring the ignition key to be cycled on and off Many different events could occur given the range of failures possible for codes 50 through 58 The following are a few examples Codes 51 52 53 54 56 and 57 at speeds above 72 Km h 45 MPH The appropriate code set is aborted and current gear is maintained If while still traveling above 72 Km h 45 MPH the gear ratio becomes valid again EMCC will reengage and normal operation will resume If the gear ratio be comes intermittent and recovers three times in a given key start the current gear will be maintained and EMCC inhibit
182. gine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 154 TRANSMISSION NGC P1775 SOLENOID SWITCH VALVE LATCHED IN TCC POSITION Continued ACTION APPLICABILITY With the DRBIII check for other Transmission DTC s Is the DTC P0841 present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P1775 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 No GoTo 11 pressed Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Repair internal transmission as necessary per the Service nfor mation Inspect the Solenoid Switch Valve per the Service Infor mation and repair or replace as necessary If no problems are found replace the Transmission Solenoid Pressure Switch Assem bly Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine no
183. gnostic monitors have run Key Start A vehicle start and run cycle of at least 20 seconds Warm up Cycle A vehicle start and run cycle such that the engine coolant must rise to at least 71 C 160 F and must rise by at least 4 4 C 40 F from initial start up To count as a warm up cycle no DTC may occur during the cycle NOTES 24 7 0 DIAGNOSTIC INFORMATION AND PROCEDURES COMMUNICATION Symptom NO RESPONSE FROM TRANSMISSION CONTROL MODULE POSSIBLE CAUSES NO RESPONSE FROM TRANSMISSION CONTROL MODULE FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN FUSED B CIRCUIT OPEN GROUND CIRCUIT S OPEN POWERTRAIN CONTROL MODULE PCI BUS CIRCUIT OPEN BODY CONTROL MODULE ACTION APPLICABILITY Turn the ignition on All Note As soon as one or more module communicates with the DRB answer the question With the DRB attempt to communicate with the Instrument Cluster With the DRB attempt to communicate with the Body Control Module Was the able to I D or establish communications with both of the modules Yes GoTo 2 No Refer tothe Communications category and perform the appropri ate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off Disconnect the PCM harness connectors CAUTION DO PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPEC
184. harge or been replaced recently Yes Disconnecting or replacing the battery will set this DTC Erase the DTC Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 3 Has a Quick Learn procedure been performed Yes Performing Quick Learn will set this DTC Erase the DTC Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 4 Has the PCM been replaced or disconnected All Yes Replacing or disconnecting the PCM will set this DTC Erase the DTC Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 5 Turn the ignition off to the lock position Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Using a 12 volt test light connected to ground check the Fused B circuit NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 6 No Repair the Fused for an open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 149 TRANSMISSION NGC P1684 BATTERY WAS DISCONNECTED Continued ACTION APPLICAB
185. he wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 105 TRANSMISSION NGC Symptom P0845 2 4 HYDRAULIC PRESSURE TEST FAILURE When Monitored and Set Condition P0845 2 4 HYDRAULIC PRESSURE TEST FAILURE When Monitored In any forward gear with engine speed above 1000 RPM shortly after a shift and every minute thereafter Set Condition After a shift into a forward gear with engine speed greater than 1000 RPM the PCM momentarily turns on element pressure to the clutch circuits that don t have pressure to identify the correct pressure switch closes If the pressure switch does not close 2 times the DTC sets POSSIBLE CAUSES LOSS OF PRIME P
186. hey will also be tested immediately after a gear ratio or pressure switch error is detected Set Condition Three consecutive solenoid continuity test failures or one failure if test is run in response to a gear ratio or pressure switch error POSSIBLE CAUSES RELATED RELAY 5 PRESENT UD SOLENOID CONTROL CIRCUIT OPEN UD SOLENOID CONTROL CIRCUIT SHORT TO GROUND UD SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE UD SOLENOID INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most set start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash leve
187. hicle battery is fully charged an inoperative DRBIII may betheresult of faulty cable or vehicle wiring For a blank screen refer to the appropriate Body Diagnostic manual 3 5 2 DISPLAY IS NOT VISIBLE Low temperatures will affect the visibility of the display Adjust the contrast to compensate for this condition 3 5 3 SOME DISPLAY ITEMS READ This is caused by the scrolling the DRBIII display a single line up or down The line which was scrolled onto the screen might read Use the page down or page up function to display the information 3 6 TRANSMISSION SIMULATOR MILLER TOOL 8333 AND ELECTRONIC TRANSMISSION ADAPTER KIT MILLER TOOL 8333 1A NOTE Remove the starter Relay when using the transmission simulator e Failure to remove the Starter Relay can cause a PCM No Response condition e The removal of the Starter Relay will also prevent the engine from starting in gear e The Transmission Simulator will not accurately diagnose intermittent faults The transmission simulator simply put is an electronic device that simulates the electronic func tions of any EATX or NGC controlled transmission The transmission Simulators basic function is to aid the technician in determining if an internal transmission problem exists or if the problem re sides the vehicle wiring or control module It is only useful for electrical problems It will not aid the diagnosis of a failed mechanical c
188. hms Frequency Measured 0 10 kHz Frequency Generated Temperature 58 1100 F 50 600 C Ohms cannot be measured if voltage is present Ohms can be measured only in a non powered circuit e Voltage between any terminal and ground must not exceed 500v DC or 500v peak AC e Use caution when measuring voltage above 25v DC or 25v AC The circuit being tested must be protected by a 10A fuse or circuit breaker e Usethe low current shunt to measure circuits up to 10A Use the high current clamp to measure circuits exceeds 10A e When testing for the presence of voltage or current make sure the meter is functioning correctly Take a reading of a known voltage or current before accepting a zero reading e When measuring current connect the meter in series with the load e Disconnect the live test lead before disconnect ing the common test lead e When using the meter function keep the DRBIII away from spark plug or coil wires to avoid measuring error from outside interference 4 3 WARNINGS 4 3 1 VEHICLE DAMAGE WARNINGS Before disconnecting any control module make sure the ignition is lock position Failure to do so could damage the module When testing voltage or continuity at any control module use the terminal side not the wire end of the connector Do not probe a wire through the insulation this will damage it and eventually cause it to fail because of corrosion Be careful when performing electrica
189. hree positions on the Transmission Simulator Compare the DRBIII readings with the numbers listed on the Transmission Simulator Do the readings on the Transmission Simulator match the DRBIII readings 0 2 volts Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Replace Transmission Solenoid TRS assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the Input Output switch to OFF With the DRBII monitor the TRANS TEMP VOLTS while turning the Thermistor 57 TRANSMISSION NGC P0713 TRANSMISSION TEMPERATURE SENSOR HIGH Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM C4 harness connector Disconnect the Transmission Solenoid TRS Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNE
190. iagnostic procedure for code P0944 35 first gt Failed or slipping 2 4 clutch may also set code P0734 54 2 4 seat leakage intermittent Sticky accumulator seals intermittent gt Failed or intermittent slipping UD clutch may also set code 731 51 and or 733 53 UD seal leakage intermittent Worn input clutch hub bushing hard code at heavy throttle Sticky UD accumulator seals intermittent Worn reaction shaft support seal rings hard code at heavy throttle Solenoid pack UD pressure 4th gear Code 0733 53 Excludes geartrain failures which should be obvious upon disassembly gt If code P0944 35 is also set follow diagnostic procedure for code P0944 35 first gt Failed or slipping OD clutch may also set code P0734 54 OD and Reverse inner and outer lip seal leakage usually hard code Sticky OD accumulator seals intermittent Worn reaction shaft support seal rings hard code at heavy throttle Broken OD UD tapered snap ring hard code at heavy throttle gt Failed or intermittent slipping UD clutch may also set code 731 51 and or 732 52 UD seal leakage intermittent Worn input clutch hub bushing hard code at heavy throttle Sticky UD accumulator seals intermittent Worn reaction shaft support seal rings hard code at heavy throttle Solenoid pack UD pressure in 4th gear Code 0734 54 Excludes geartrain failures which should be obvi
191. ially for customers who operate in city construction stop and go traffic tow trailers regularly drive aggres sively in low gear or drive regularly in mountain areas Transmission effects nformation only code Overheat shift schedule was activated no Limp in condition occurs 2nd gear partial EMCC above 40 Km h 25 MPH 3rd gear EMCC from 45 69 Km h 28 43 MPH delayed 3 4 upshift at 69 Km h 43 MPH early 4 3 coastdown at 66 Km h 41 MPH EMCC operation under all conditions above 40 Km h 25 MPH except at closed throttle or 1st gear Possible causes Transmission Overfilled with Oil Engine cooling fan failure Engine thermostat stuck closed Radiator corroded or packed with dirt Transmission Oil Cooler Plugged Customer driving pattern requires additional transmission cooling Name of code P0884 76 Power Up at Speed When monitored When PCM transmission con trol module initially powers up Set condition the PCM powers up whilein the Drive position and the vehicle is going above 32 Km h 20 MPH the code is set Theory of operation f a vehicle loses power to the PCM the vehicle will go to the 2nd gear mode since there is no power available to control the transmission solenoids However if power is re stored the PCM will power up and normal opera tion will be restored This DTC identifies that power to the PCM was restored when the gear selector was in a Drive
192. ine and adjust the fluid per the Service Information Note The Transmission Cooler must be flushed before prodceeding Allow the engine to idle for 10 minutes in Park Turn the ignition off to the lock position Again flush the Transmission Oil Cooler and lines replace the Transmission Oil Filter refill with new Transmission Fluid start the engine and adjust the fluid per the Service Information With the DRBIII perform a Battery Disconnect NOTE The Battery Disconnect must be done to re enable EMCC during an A C Clutch engagement NOTE The vehicle may exhibit intermittent shudder during the first few hundred miles The new Transmission Fluid will gradually penetrate the Torque Convertor Clutch friction material and the shudder should disap pear Erase the DTC and return the vehicle to the customer Did the DTC reset and or does the vehicle still shudder after a few thousand miles Yes Replace the Torque Converter per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 137 TRANSMISSION NGC Symptom P0944 LOSS OF PRIME When Monitored and Set Condition P0944 LOSS OF PRIME When Monitored If the transmission is slipping in any forward gear and the pressure switches are not indicating pressure a loss of prime test is run Set Condition If the Transmission begins to slip in a forward gear and the pressure switch s that should be closed are open a loss
193. ine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the Speed Sensor Ground circuit in the Pinout Box 15 the voltage above 0 5 volt Yes Repair the Speed Sensor Ground circuit for short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 10 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 65 TRANSMISSION NGC Symptom 720 SPEED SENSOR ER
194. ission ID tag descriptions 3 0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION 3 1 GENERAL DESCRIPTION The 40 41TE electronic transaxle is a conven tional transaxle in that it uses hydraulically ap plied clutches to shift a planetary gear train How ever the electronic control system replaces many of the mechanical and hydraulic components used in conventional transmission valve bodies 3 2 FUNCTIONAL OPERATION The 40 41TE electronic transaxle has a fully adaptive control system The system performs it s functions based on continuous real time sensor feedback information The control system automat ically adapts to changes in engine performance and friction element variations to provide consistent shift quality The control system ensures that clutch operation during upshifting and downshifting is more responsive without increased harshness The PCM continuously checks for electrical prob lems mechanical problems and some hydraulic problems When a problem is sensed the PCM stores a diagnostic trouble code Some of these codes cause the transaxle to go into Limp in or default mode While in this mode electrical power is taken away from the transaxle via the PCM de energizing the transmission control relay and tak ing power from the solenoid pack When this hap pens the only transaxle mechanical functions are Park and Neutral GENERAL INFORMATION Reverse Second Gear No upshifts or downshifts are possible
195. it for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the Input Speed Sensor harness connector Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between the Fused B circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running Measure the voltage of the Input Speed Sensor Signal circuit Is the voltage above 0 5 volts Yes Repair the Input Speed Sensor Signal circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 64 TRANSMISSION NGC 0715 SPEED SENSOR ERROR Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the TRS harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B and the Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on eng
196. ith the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete With the read Transmission DTC s Are the DTC s P0845 and or P0846 present also Yes ReplacetheTransmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 75 TRANSMISSION NGC 0732 RATIO ERROR IN 2ND Continued If there no possible causes remaining view repair Repair ACTION APPLICABILITY All Repair internal transmission per the Service Information Check all of the components related to the UD and 2 4 clutches Inspect the Oil Pump and repair or replace per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 76 TRANSMISSION NGC Symptom P0O733 GEAR RATIO ERROR IN 3RD When Monitored and Set Condition 0733 RATIO ERROR IN When Monitored The Transmission gear ratio is monitored continuously while the Transmission is in gear Set Condition If the ratio of the Input RPM to the Output RPM does not match the current gear ratio POSSIBLE CAUSES RELATED PRESENT TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY INTERNAL TRANSMISSION INTERMITTENT GEAR RATIO ERRORS ACTION AP
197. k then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 74 TRANSMISSION NGC 0732 RATIO ERROR IN 2ND Continued ACTION APPLICABILITY With the DRBIII read Transmission If any of these DTC s are present perform their respective tests first Are there any Loss of Prime Line Pressure Sensor and or Speed Sensor DTCs present Yes Refer the Transmission category and perf
198. l of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 99 TRANSMISSION NGC P0765 UD SOLENOID CIRCUIT Continued ACTION APPLICABILITY With the DRBIII read Transmission DTC s Are there any Transmission Control Relay DTC s present also Yes Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P0765 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter set at 0 Yes GoTo 4 GoTo 9 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running Monitor the UD Solenoid LED on the Transmission Simulator With the DRBIII actuate the UD Solenoid Did the UD Solenoid LED on the Transmission Simulator blink on and off Yes GoTo 5 GoTo 6 If there are no possible causes remaining view repair Repair Replace the Transmission Solenoid Pressure Switch As
199. l tests so as to prevent accidental shorting of terminals Such mistakes can damage fuses or components Also a GENERAL INFORMATION second DTC could be set making diagnosis of the original problem more difficult When replacing a blown fuse it is important to use only a fuse having the correct amperage rating Theuse of a fuse with a rating other than indicated may result in a dangerous electrical system over load If a properly rated fuse continues to blow it indicates a problem in the circuit that must be corrected 4 3 2 ROAD TEST COMPLAINT VEHICLE Some complaints will require test drive as part of the repair verification procedure The purpose of the test drive is to try to duplicate the diagnostic DTC or symptom condition CAUTION Before road testing a vehicle be sure that all components are reassembled During the test drive do not try to read the DRBIII screen while in motion Do not hang the DRBIII from the rear view mirror or operate it yourself Have assistant available to operate the DRBIII Road testing is an essential step in the diagnos tic process that must not be overlooked Along with diagnostic information obtained from the DRBIII Scan Tool and the original customer concern the road test helps to verify the problem was current and any repairs performed fixed the vehicle cor rectly Always operate and observe the vehicle under actual driving conditions J ust as important as the road te
200. lbs illuminate with the Transmission Simulator Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running Press the Reverse Light Test button on the Transmission Simulator while observing GoTo 5 169 TRANSMISSION NGC BACKUP LAMPS INOPERATIVE Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the TRS harness connector Ignition on engine not running Using a 12 volt test light connected to ground check the Fused Ignition Switch Output circuit in the TRS harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 6 No Repair the Fused Ignition Switch Output circuit for an open If the fuse is open make sure to check for a short to ground Turn the ignition off to the lock position Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Remove the Backup Lamp bulb s Ignition on engine not running Note Check connectors Clean repair as necessary Usinga 12 volt test light connected to ground
201. manual for the proper removal and repair procedure Diagnostic procedures change every year New diagnostic systems may be added and or carryover systems may be enhanced READ THIS MANUAL BEFORE TRYING TO DIAGNOSE A VEHICLE TROUBLE CODE It is recommended that you review the entire manual to become familiar with all new and changed diagnostic procedures This book reflects many suggested changes from readers of past issues After using this book if you have any comments or recommendations please fill out the form at the back of the book and mail it back to us 1 1 SYSTEM COVERAGE This diagnostic procedures manual covers the 2004 PL vehicles equipped with a 40 41TE tran saxle 1 2 SIX STEP TROUBLESHOOTING PROCEDURE Diagnosis of the 40 41TE electronic transaxle is done in six basic steps GENERAL INFORMATION e verification of complaint e verification of any related symptoms e symptom analysis e problem isolation e repair of isolated problem e verification of proper operation 2 0 IDENTIFICATION OF SYSTEM PL vehicles with a 4 speed automatic transmis sion can be visually identified Notice that the 40 41TE transmission has all connectors for the Transmission Solenoid Pressure Switch Assembly Transmission Range Sensor Input Speed Sensor and Output Speed Sensor are located on the same side of the transmission case If the transmission part number is required refer to the Service nfor mation for transm
202. mission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine DTC s prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 136 TRANSMISSION NGC 897 OUT BURNT TRANSAXLE FLUID Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Flush the Transmission Oil Cooler and lines replace the Transmission Oil Filter refill with new Transmission Fluid start the eng
203. mp in condition Possible causes gt If code P0944 35 is present ignore code P0846 22 and perform code P0944 diagnostic procedures gt 2 4 pressure switch sense circuit open or shorted to ground between PCM and solenoid pack gt 2 4 pressure switch sense circuit shorted to battery gt Solenoid Pressure Switch assembly gt Transmission overheated Excessive regula tor valve leakage in valve body causing high line pressure which results in 2 4 solenoid blow off in 1st or 3rd gear May require new valve body if it happens only when hot gt Loose valve body bolts gt Plugged filter internal transmission torque converter failure gt PCM Name of code P0841 24 LR Pressure Switch Sense Circuit When monitored Whenever the engine is run ning Set condition This code is set if the LR pressure switch is either open or closed at the wrong time a given gear Theory of operation The Transmission system uses three pressure switches to monitor the fluid pressure in the LR 2 4 and OD elements The pressure switches are continuously monitored for the correct states in each gear PRESSURE SWITCH STATES SWITCHES L R CLOSED CLOSED OPEN CLOSED 2 4 OPEN OPEN CLOSED CLOSED 80d9d3b5 Transmission Effects f set condition is iden tified 1st gear and torque converter lock up EMCC will be inhibited The vehicle will launch in 2nd gear and shif
204. mpletion of this procedure make sure to disconnect the Transmission Simulator Miller tool 8333 and FWD adaptor cable kit Miller tool 8333 1A and reconnect all connectors If there no possible causes remaining view repair Repair Replace the Transmission Range Sensor per the Service nforma tion Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Ignition on engine not running With the DRBIII monitor the TRS Sense circuits on the Input Output screen thru C4 Move the shift lever through all gear positions pausing momentarily in each gear position and watch for one of the circuits to not change state Pick the one that did not change state TRS T1 sense C4 GoTo 7 TRS T3 sense C3 GoTo 10 TRS 41 sense C1 GoTo 13 TRS T42 sense C2 GoTo 16 44 TRANSMISSION NGC 706 SHIFTER SIGNAL Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the TRS T1 Sense circuit from the appropriate terminal of special tool 8815 to the TRS harness connector Is the resistance
205. n Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the Pressure Switch selector to L R With the DRBIII monitor the L R Pressure Switch state while pressing the Pressure Switch Test button on the Transmission Simulator Did the L R Pressure Switch state change Yes GoTo 6 GoTo 7 there no possible causes remaining view repair Repair Replace the Transmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 103 TRANSMISSION NGC P0841 LR PRESSURE SWITCH SENSE CIRCUIT Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measurethe resistance of the L R Pressure Switch Sense circuit from th
206. n be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 111 TRANSMISSION NGC 846 2 4 PRESSURE SWITCH SENSE CIRCUIT Continued ACTION APPLICABILITY With the DRBIII read Transmission DTC s Are there any Transmission Control Relay DTC s present also Yes Refer to the Transmission category and
207. ng diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for P0706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 130 TRANSMISSION NGC P0890 SWITCHED BATTERY Continued ACTION APPLICABILITY With the DRBIII Check the STARTS SINCE SET counter for P0890 All Note This counter only applies to the last DTC set 15 the STARTS SINCE SET counter set at 0 Yes GoTo 3 No GoTo 7 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE TH
208. nition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the OD Pressure Switch Sense circuit from the appropriate terminal of special tool 8815 and the Transmission Solenoid Pressure Switch Assembly harness connector Is the resistance above 5 0 ohms Yes Repair the OD Pressure Switch Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 121 TRANSMISSION NGC P0871 OD PRESSURE SWITCH SENSE CIRCUIT Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the OD Pressure Switch Sense circuit Is the resistance below 5 0 ohms Yes Repair
209. nput droit hin No 1 1797 Manual shift overheat 77 No 0897 Worn outfburnt transaxle fluid No No 071 Transmission temperature sensor performance No No Po7i2 Transmission temperature sensorlow No No 7c Po713 Transmission temperature sensor high No No 7 Po7i4 Transmission temperature sensor intermittent 75 P0218 High temperature operation activated No 76 0884 Powerupatspeed NN 77 P1687 No communication with the z lt lt lt lt lt lt z GENERAL INFORMATION The Transmission Control System may report any of the following 5 Name of Code Limp in MIL 1652 Serial communication link malfunction No Low battery voltage jaa PO6I3 internal TOM CdS Notes P1xxx DTC s will set the MIL only after 10 seconds of vehicle operation 1 MIL will be lit only if DTC P0706 is also present 2 The MIL will be lit by the engine controller 3 TheMIL will be lit only if the engine controller is not calibrated for throttle substitution Yes underlined indicates that this DTC can take up to five minutes of problem identification before illuminating the MIL 3 3 8 DTC DESCRIPTIONS Name of code P0613 11 13 45 94 Internal TCM When monitored Whenever the key 15 in the Run or Run Start position Set condition This code is set whenever Trans mission Control System senses an intern
210. ntinued APPLICABILITY With the DRBIII read Engine DTCs All Are there any Engine 5 present Yes Refer to the Powertrain category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 4 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits there no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 71 TRANSMISSION NGC Symptom P0O731 GEAR RATIO ERROR IN 1ST When Monitored and Set Condition 0731 RATIO ERROR IN 1ST When Monitored The Transmission gear ratio is monitored continuously while the transmission is in gear Set Condition If the rati
211. nuously monitored for the correct states in each gear as shown below Transmission Effects f the 2 4 pressure switch is identified as closed in P or N the code will immediately be set and normal operation will be allowed for that given key start If the problem is identified for 3 successive key starts the transmis sion will go into Limp in mode PRESSURE SWITCH STATES CLOSED CLOSED 80d9d3b5 If the 2 4 pressure switch is identified as being closed in 1st or 3rd gear and was not identified as being closed in P or N then 2nd gear or 4th gear will be substituted for 1st or 3rd gear depending on throttle angle and vehicle speed A short period of time after the gear substitution the transmission will return to normal operating mode If the trans mission is shifted back into 1st or 3rd gear through normal operation and the 2 4 pressure switch remains closed 2nd or 4th gear will be substituted briefly and then resume normal operation four gear substitutions occur in a given key start the transmission will go into Limp in mode the 2 4 pressure switch is open indicating 2 4 clutch pressure in 2nd or 4th gear the Trans mission Control System sets code P0846 22 and continues with normal operation The transmis sion will only go into Limp in mode if a code 0706 28 is also present If no 2 4 clutch pressure is present a gear ratio code 732 52 or 734 54 will be set and cause the li
212. o of the Input RPM to the Output RPM does not match the current gear ratio POSSIBLE CAUSES RELATED PRESENT INTERNAL TRANSMISSION INTERMITTENT GEAR RATIO ERRORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio 5 check and record all CVI s Most set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 72 TRANSMISSION NGC 0731
213. o the lock position Disconnect the PCM harness connector Disconnect the AutoStick Switch harness connector Note Check connectors Clean repair as necessary CAUTION DO PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the AutoStick Upshift Sense circuit Is the resistance below 5 0 ohms Yes Repair theAutoStick Upshift Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 5 Ignition on engine not running With the DRBIII display the AutoStick Switch status Shift into AutoStick Push the shift lever to the right several times to actuate the AutoStick Upshift Switch and then tothe left several times to actuate theAutoStick Downshift Switch Do both AutoStick Upshift and Downshift Switch states toggle Yes Test Complete No Replace the Powertrain Control Module per the Service Informa tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 142 TRANSMISSION NGC P0952 AUTOSTICK INPUT CIRCUIT LOW Continued ACTION APPLICABILITY The conditions necessary to set this DTC are not present at this time All Using the schematics as a guide inspect the wiring and c
214. ode 890 20 Switched Battery When monitored gnition key is turned from off position to run position and or ignition key is turned from crank position to run position Set condition This code is set if the PCM senses voltage on any of the pressure switch inputs prior to the PCM energizing the relay Theory of operation The transmission control relay is used to supply power to the solenoid pack when the transmission is in normal operating mode When the relay is off no power is supplied to the solenoid pack and the transmission is in Limp in mode The relay output is fed back to the PCM It is referred to as the Transmission Control Relay Output circuit or switched battery Immediately after a controller reset ignition key turned to the run position or after cranking en gine the PCM verifies that the relay contacts are open by checking for no voltage at the switched battery terminals After this is verified the voltage at the pressure switches is checked There should be no voltage on the pressure switches at this time The PCM will then activate the relay Transmission Effects The MIL illuminates and the transmission system defaults to Limp in mode Possible causes gt Short to battery on one or more pressure switch sense circuits gt PCM connector problems gt PCM Name of code P0871 21 OD Pressure Switch Sense Circuit When monitored Whenever the engine is run ning Set condition This code is set if the OD
215. ody Control Module in accordance with the service information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Repair the PCI Bus circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 28 TRANSMISSION NGC Symptom 122 POSITION SENSOR APPS LOW M When Monitored and Set Condition P0122 THROTTLE POSITION SENSOR APPS LOW When Monitored Continuously with the ignition on and engine running Set Condition This DTC will set if the monitored TPS voltage drops below 078 volts for the period of 0 48 seconds POSSIBLE CAUSES RELATED TPS ENGINE DTC S PRESENT POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom
216. oes the test light illuminate brightly Yes GoTo 10 No Repair the Transmission Control Relay Output circuit for open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 97 TRANSMISSION NGC P0760 OD SOLENOID CIRCUIT Continued ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service Informa tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 98 TRANSMISSION NGC Symptom P0765 UD SOLENOID CIRCUIT When Monitored and Set Condition P0765 UD SOLENOID CIRCUIT When Monitored Initially at power up then every 10 seconds thereafter T
217. oftware NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 This test is set along with a gear ratio DTC Perform the appropriate test for the Gear Ratio DTC stored NOTE Check 1 trip failures if there are no gear ratio DTCs current If there are no possible causes remaining view repair Repair Refer to the Transmission category and perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 162 TRANSMISSION NGC Symptom P1793 TRD LINK COMMUNICATION ERROR When Monitored and Set Condition P1793 TRD LINK COMMUNICATION ERROR When Monitored TheTransmission Control Module TCM pulses the 12 volt TRD signal from the Powertrain Control Module PCM to ground during torque managed shifts with the throttle angle above 54 degrees The TRD system is also tested whenever the vehicle is stopped and the engine speed is at idle Set Condition This DTC is set when the Transmission Control Module TCM sends two subsequent torque reduction messages to the Powertrain Control Module PCM and does not receive a confirmation from the PCM Note Due to the integration of the Powertrain and Transmission Control Modules bus communication between the modules is internal POSSIBLE CAUSES POWERTRAIN CONTROL MODULE ACTION APPLICABILITY NOTE Due to the integration of the Engine and Transmission controllers All into one
218. omponent 20 but it can tell you that the control module and wiring are working properly and that the problem is internal Theignition switch should bein the lock position before attempting to install the simulator Follow all instructions included with the simulator If the feedback from the simulator is in doubt you can verify it s operation by installing it on a known good vehicle A known good vehicle would be defined as a vehicle that does not set any 5 and drives and shifts as expected One important point to remember is that the Simulator receives it s power from the Trans Relay Output circuit If the transmission system is in Limp in Relay open the simulator will not oper ate This is not really an indication of a problem but an additional symptom If the simulator does not power up P led lit this is an indication that the problem is still present with the simulator hooked up This indicates that the problem isin the wiring or control module and not the transmission Miller Tool 8333 1A consists of the adapter cables and overlay necessary to adapt the 8333 simulator to TE AE LE RLE transmissions 4 0 DISCLAIMERS SAFETY AND WARNINGS 4 1 DISCLAIMERS All information illustrations and specifications contained in this manual are based on the latest information available at the time of publication The right is reserved to make changes at any time without notice 4 2 SAFETY 4
219. onnectors specific to this circuit Wiggle the wires while checking for shorts and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 143 TRANSMISSION NGC Symptom 992 2 4 00 HYDRAULIC PRESSURE TEST FAILURE When Monitored and Set Condition 0992 2 4 00 HYDRAULIC PRESSURE TEST FAILURE When Monitored In any forward gear with engine speed above 1000 RPM shortly after a shift and every minute thereafter Set Condition After a shift into a forward gear with engine speed gt 1000 RPM the PCM momentarily turns on element pressure to the clutch circuits that don t have pressure to identify the correct pressure switch closes I f the pressure switch does not close 2 times the DTC sets POSSIBLE CAUSES CONDITION P0992 PRESENT APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Re
220. ons which the DTC was set If there are no possible causes remaining view repair Repair Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 124 TRANSMISSION NGC Symptom P0888 RE LAY OUTPUT ALWAYS OFF When Monitored and Set Condition 0888 OUTPUT ALWAYS OFF When Monitored Continuously Set Condition This DTC is set when less than 3 volts are present at the Transmission Control Relay output circuits at the Transmission Control Module TCM when the TCM is energizing the relay Note Due to the integration of the Powertrain and Transmission Control Modules the transmission part of the PCM has its own specific power and ground circuits POSSIBLE CAUSES FUSED B CIRCUIT OPEN TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN TRANSMISSION CONTROL RELAY CONTROL CIRCUIT OPEN TRANSMISSION CONTROL RELAY GROUND CIRCUIT OPEN TRANSMISSION CONTROL RELAY STUCK OPEN TRANSMISSION CONTROL RELAY CONTROL CIRCUIT SHORT TO GROUND TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS 125 TRANSMISSION NGC PO888 RELAY OUTPUT ALWAYS OFF Continued ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged
221. or TRS Measured trans temp 200 F Trans temp voltage 4 6 volts H A R T 5 D G R A P H S Volts Valid range 0 078 4 939 80 60 40 20 0 20 40 60 80 100120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 Degrees F 80dcc836 201 NOTES 202 DIAGNOSTIC TEST PROCEDURES TELL US DaimlerChrysler Corporation is constantly working to provide the technician the best diagnostic manuals possible Your comments and recommendations regarding the diagnostic manuals and procedures are appreciated To best understand your suggestion please complete the form giving us as much detail as possible Model 7 Engine 1 MDH Diagnostic Procedure Comments recommendations if necessary draw sketch Name Submitted by Address City State Zip Business Phone All comments become property of DaimlerChrysler Corporation and may be used without compensation FOLD HERE NO POSTAGE NECESSARY IF MAILED BUSINESS REPLY MAIL IN THe FIRST CLASS MAIL PERMIT NO 124 CENTER LINE STATES POSTAGE WILL BE PAID BY ADDRESSEE DaimlerChrysler Corporation Dealer Technical Operations 800 Chrysler Drive CIMS 486 02 76 Auburn Hills 48326 2757 FOLD HERE
222. orm the appropriate symptom any of these DTC s are present they will cause a gear ratio error Perform the test for Loss of Prime first if it is present Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII perform the 2nd gear clutch test Follow the instructions the DRBIII Increase the throttle angle or TPS Degree to 30 for no more than a few seconds CAUTION Do not overheat the transmission Did the Clutch Test pass Input Speed remain at zero Yes GoTo 4 GoTo 5 The conditions to set this DTC are not current at this time All Check the Gearshift Linkage adjustment Gear ratio DTC s can be set by problems in the Input and Output Speed Sensor circuits If the vehicle passes the Clutch Test and still sets Gear Ratio check the Speed Sensors for proper operation Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Check the Speed Sensor wiring and connectors for good connection then perform a wiggle test using the Transmission Simulator Miller tool 8333 and the Electronic Transmission Adapter kit 8333 1A This DTC can also be set under extreme temperature conditions this is usually caused by an internal problem Verify if the problem is only experienced under extreme hot or cold conditions Check for any Technical Service Bulletins TSBs that may apply W
223. ost DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 166 TRANSMISSION NGC P1797 MANUAL SHIFT OVERHEAT Continued ACTION APPLICABILITY This is an informational DTC only All With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Check the engine and transmission cooling system for proper operation Check the Radiator Cooling Fan operation Check the Transmission Cooling Fan operation if equipped Check the Transmission Fluid Level per the Service Information Make sure it is not overfilled NOTE Aggressive driving or driving in low for extended periods of time in AutoStick mode will set this DTC If there are no possible causes remaining view repair Repair If the Transmission Fluid is low repair any Transmission Fluid leak as necessary and adjust the Transmission Fluid Level per the Service Information Refer to Service Information for the related symptoms and repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 167 TRANSMISSION NGC Symptom BACKUP LAMPS COME ON WHILE SHIFTER 15 NOT IN REVERSE POS
224. ous upon disassembly gt If code P0944 35 is also set follow diagnostic procedure for code P0944 35 first gt Failed or slipping OD clutch may also set code P0733 53 OD and Reverse inner and outer lip seal leakage usually hard code Sticky OD accumulator seals intermittent Worn reaction shaft support seal rings hard code at heavy throttle Broken OD UD tapered snap ring hard code at heavy throttle gt Failed or slipping 2 4 clutch may also set code 0732 52 2 4 seal leakage intermittent Sticky accumulator seals intermittent Codes 0715 56 and 720 57 gt Failed input or output speed sensor intermit tent or hard code gt Shorted or open wiring between PCM and speed sensor s intermittent gt PCM Connector problems and or Speed Sensor connector Code P1794 58 gt Open or shorted speed sensor ground speed sensor ground is different from chassis ground gt Open or shorted Temperature Sensor wiring to TRS gt TRS Will also set code P1799 74 gt PCM Name of code P0952 69 AutoStick Sensor Cir cuit Low If equipped When monitored Whenever the engine is run ning Set condition 1 The transmission shift lever is not in AutoStick and either the upshift or downshift switch is closed 2 Upshift and downshift switches closed at the same time Theory of operation In the AutoStick Mode manual shift mode upshifts and downshifts are actuated manually Shift
225. ously with engine running Set Condition The DTC sets in approximately 25 seconds if no BUS messages are received form the MIC POSSIBLE CAUSES OTHER BUS PROBLEMS PRESENT MIC NO COMMUNICATION POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all 5 Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prio
226. per the Service Information Repair the cause of the plugged Transmis sion Oil Cooler as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 This DTC is an informational DTC designed to aid the Technician in diagnosing shift quality complaints This DTC indicates that the transmission has been operating in the Overheat shift schedule which may generate a customer complaint The customer driving patterns may indicate the need for an additional transmission oil cooler With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set View repair options Repair Repair the cause of transmission overheating per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 36 TRANSMISSION NGC Symptom P0562 LOW BATTERY VOLTAGE When Monitored and Set Condition P0562 LOW BATTERY VOLTAGE When Monitored With the engine running and the PCM has closed the Transmission Control Relay Set Condition If the battery voltage of the Transmission Control Relay Output Sense circuit s to the PCM is less than 10 0 volts for the period of 15 seconds Note P0562 generally indicates a gradually falling battery voltage or a resistive connection s to the PCM The DTC will also set if the battery voltage sensed at the PCM is less than 6 5v for 200ms or where Transmission Control Relay Output circuits is less than 7 2v for 200ms POSSIBLE CAUSES RE
227. perform the appropriate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 3 With the DRBIII Check the STARTS SINCE SET counter for P0846 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter 2 or less Yes GoTo 4 No GoTo 11 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary Ignition on engine not running With the Transmission Simulator turn the Pressure Switch selector to 2 4 With the DRBII monitor the 2 4 Pressure Switch state while pressing the Pressure Switch Test button on the Transmission Simulator Did the state of the 2 4 Pressure Switch change while pressing the Pressure Switch Test button Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Replace the Transmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTIO
228. ppen even with the volume turned down Does the noise get louder or change pitch while the engine speed is changing Yes GoTo 3 No GoTo 4 176 TRANSMISSION NGC Symptom TRANSMISSION SHIFTS EARLY WITH NO DTC S POSSIBLE CAUSES VEHICLE BUS PROBLEMS CHECK FOR INTERMITTENT WIRING amp CONNECTORS COLD TRANSMISSION ACTION APPLICABILITY Using the check all other Modules for signs of a PCI bus problem such as All bus related DTC s and or communication problems Check and diagnose all 1 trip failures as a hard code Although it takes two occurences of a missed TRD link message to set the DTC P1793 one missed message will cause the transmission to short shift until the next start up the vehicle has any indications of a bus problem the bus must be repaired first Do any of the other modules show signs of a bus problem Yes Refer to the Communication category and perform the appropri ate diagnostics No GoTo 2 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorts and open circuits Although it takes two occurences of a missed TRD link message to set the DTC P1793 one missed message will cause the transmission to short shift until the next start up If the vehicle has any indications of a bus problem the bus must be repaired first Were there an
229. prevent erro neous clutch volume values which could cause poor initial shift quality Place the selector lever in neutral The brakes must be applied The engine must be idling The throttle angle TP sensor must be less than 3 degrees The shift lever position must stay in neutral until prompted to shift into OD The shift lever must stay in OD after the Shift to Overdrive prompt until the DRBIII indicates the procedure is complete The oil temperature must be between 15 C 60 F and 93 C 200 F NOTE The above conditions must be maintained during the procedure to keep the procedure from being aborted The Quick Learn procedure is performed with the DRBIII by selecting Transmission system then Miscellaneous functions then Quick Learn Follow the procedure instructions dis played on the DRBIII 3 3 10 CLUTCH VOLUMES Theory of Operation The volumes of the trans mission fluid needed to apply the friction elements are continuously monitored and learned for adap tive controls As the clutch friction material wears the volume of fluid needed to apply the clutch increases The following are typical clutch vol umes the clutches may be damaged if the volumes are greater or less than the specified below The LR clutch volume is updated when doing a 2 1 or 3 1 coast down shift The transmission temper ature must be between 21 49 70 120 F The clutch volume should b
230. r Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Note Check connectors Clean repair as necessary With the Transmission Simulator select the OD Pressure Switch With the DRBIII monitor the OD Pressure Switch state in the following step Wiggle the wiring and connectors pertaining to this circuit while pressing the Pressure Switch Test button on the Transmission Simulator Did the OD Pressure Switch state change to closed and remain closed while wiggling the wires Yes GoTo 6 GoTo 7 If there are no possible causes remaining view repair Repair Disassemble and inspect the Valve Body per the Service nforma tion and repair or replace as necessary f no problems are found in the Valve Body replace the Transmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL T
231. r to Symptom diagnosis Continue GoTo 2 With the DRBIII Check the STARTS SINCE SET counter for P1687 Note This counter only applies to the last DTC set 15 the STARTS SINCE SET counter set to zero Yes GoTo 3 No GoTo 6 151 TRANSMISSION NGC P1687 NO COMMUNICATION WITH THE MIC Continued ACTION APPLICABILITY With the DRBIII check all of the other modules the vehicle for evidence of a vehicle bus problem Bus related in other modules point to an overall vehicle bus problem Other symptoms such as a customer complaint of intermittent operation of bus controlled features also indicate a bus problem Does the PRNDL display indicate No Bus or is there any evidence of an overall vehicle bus problem Yes Refer tothe Communications category and perform the appropri ate symptom Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 4 Ignition on engine not running All With the DRBIII clear all Start the engine in park NOTE May take up to 30 seconds of a consistent fault to set this DTC With the DRBIII read the BCM DTC s Does the Body Control Module have a MESSAGES NOT RECEIVED DTC Yes Refer tothe Communications category and perform test for MIC MESSAGES NOT RECEIVED Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 5 Ignition on engine not running With the DRBIII erase Transmission 5 S
232. requests are detected by monitoring the upshift and downshift switches The PCM monitors the above set conditions A set condition will be tolerated for up to 15 seconds before setting a code Transmission Effects The OD position shift schedule is substituted while operating in the AutoStick gear selector position No Limp in mode occurs Possible causes gt Wiring or connector problems gt AutoStick switch failure gt Name of code 1797 71 Manual Shift Overheat When monitored Whenever the engine is run ning Set condition 1 If the engine temperature exceeds 124 C 255 F while operating in AutoStick mode 2 If the transmission temperature exceeds 135 C 275 F while in AutoStick mode Theory of operation Transmission and engine temperatures are monitored during vehicle opera tion If conditions occur causing the engine or transmission to overheat the AutoStick mode will be canceled and a code will be set 15 GENERAL INFORMATION Transmission E ffects The 3 position shift sched ule that is used in non AutoStick applications is substituted while operating in the AutoStick gear selector position No Limp in mode occurs Possible causes gt Engine overheat refer to service manual for diagnosis and repair gt Transmission Overheat Restricted transmission cooling system Transmission fluid overfilled Radiator fan not functioning properly Extended driving in low gear
233. s only experienced under extreme hot or cold conditions With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete With the read Transmission DTC s Are the DTC s P0870 and or P0871 present also Yes ReplacetheTransmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 78 TRANSMISSION NGC P0733 GEAR RATIO ERROR IN Continued ACTION APPLICABILITY If there are no possible causes remaining view repair All Repair Repair internal transmission per the Service Information Check all of the components related to the UD and OD clutches Inspect the Oil Pump and repair or replace per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 79 TRANSMISSION NGC Symptom P0O734 GEAR RATIO ERROR IN 4TH When Monitored and Set Condition P0734 GEAR RATIO ERROR IN 4TH When Monitored The Transmission gear ratio is monitored continuously while the Transmission is in gear Set Condition If the ratio of the Input RPM to the Output RPM does not match the current gear ratio POSSIBLE CAUSES RELATED PRESENT TRANSMISSION SOLENOID PRESSURE SWITCH ASSEMBLY INTERNAL TRANSMISSION
234. sembly harness connector Is the resistance above 5 0 ohms Yes Repair the L R Pressure Switch Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground and the L R Pressure Switch Sense circuit Is the resistance below 5 0 ohms Yes Repair the L R Pressure Switch Sense circuit for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Connect a jumper wire between the F used B circuit and Transmission Control Relay Ou
235. sembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the UD Solenoid Control circuit from the appropriate terminal of special tool 8815 to the Transmission Solenoid Pressure Switch Assem bly harness connector Is the resistance above 5 0 ohms Yes Repair the UD Solenoid Control circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 100 TRANSMISSION NGC P0765 UD SOLENOID CIRCUIT Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance between ground
236. specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Input and Output Speed Sensor harness connectors Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the Speed Sensor Ground circuit from the appropriate terminal of special tool 8815 to the Input and Output Speed Sensor harness connectors 15 the resistance above 5 0 ohms on either circuit Yes Repair the Speed Sensor Ground circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 5 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits there no possible causes remaining view repair Repair Replace and program the Powertrain Control Module per the Service Information WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR
237. ssion Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running Measure the voltage of the TRS T41 Sense circuit 15 the voltage above 0 5 volt Yes Repair the TRS T1 Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 19 47 TRANSMISSION NGC 706 SHIFTER SIGNAL Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the TRS T42 Sense circuit from the appropriate terminal of special tool 8815 to the TRS harness connector 15 the resistance above 5 0 ohms Yes Repair the TRS 42 Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 17 Turn the ignition off to the lock position Disconnect the TRS harness connector Disconnect the PCM harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTI
238. st is there are preliminary inspections that should be performed prior to the road test Always check the fluid level and condition before taking the vehicle on a road test Determine if an incorrect fluid type is being used improper fluid will result in erratic transmis sion operation Some of the conditions of incorrect fluid level are as follows e Delayed engagement e Poor shifting or erratic shifting e Excessive noise e Overheating The next step is to verify that the shifter is correctly adjusted If the shifter is incorrectly ad justed a number of complaints can result The PCM monitors the Shift Lever Position SLP Sensor continuously If the shifter is incor rectly adjusted the PCM will sense a shift lever position that is not correct for the gear chosen by the driver This may cause a DTC to be set The following complaints may also be the result of an incorrectly adjusted or worn linkage Delayed clutch engagement e Erratic shifts 22 Vehicle will drive in neutral Engine will not crank in park or neutral Shifter will be able to be moved without the key in the ignition Not able to remove the ignition key in park Parking pawl will not engage properly The shifter should also be adjusted when replac ing the Transmission repairing the valve body or when repairing any component between the shift lever and the Transmission Some questions to ask yourself when performing the road test are as follows e 15
239. t illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 4 No Repair the Fused B circuit for an open If the fuse is open make sure to check for a short to ground Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Measure the resistance between ground and the Transmission Control Relay ground circuit Is the resistance above 5 0 ohms Yes Repair the Transmission Control Relay Ground circuit for open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 5 126 TRANSMISSION NGC PO888 RELAY OUTPUT ALWAYS OFF Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of all the Transmission Control Relay Output circuits between the Transmission Control Relay connector and the appropriate terminals of special tool 8815 Is the resistance above 5 0 ohms on either
240. t normally through the gears without allowing EMCC If during the same key start the set condition is no longer valid the transmission will return to normal operation 1st and EMCC available Limp in will not occur un less code P0841 24 is accompanied by a code 0706 28 and the MIL will illuminate after 5 minutes of substituted operation Possible causes gt If code P0944 35 is present ignore code P0841 24 and perform code P0944 35 diag nostic procedures gt LR pressure switch sense circuit open or shorted to ground between PCM and solenoid pack gt LR pressure switch sense circuit shorted to battery gt Solenoid Pressure Switch assembly gt Valve body solenoid switch valve stuck in LU position May be accompanied by a code P1775 37 gt Loose valve body bolts gt Plugged filter internal transmission or torque converter failure gt Name of code P0706 28 Check Shifter Signal When monitored Continuously with the key on Set condition 3 occurrences in one key start of an invalid PRNDL code which lasts for more than 0 1 second Theory of operation The C1 through C4 1 T3 T41 and T 42 sense circuits communicate the shift GENERAL INFORMATION lever position to the PCM Each circuit is termi nated at the transmission with a switch Each switch can be either open or closed depending on the shift lever position The PCM can decode this information and determine the shift lever position
241. t running With the Transmission Simulator turn the Pressure Switch selector switch to L R With the DRBIII monitor the L R Pressure Switch State while pressing the Pressure Switch Test button Did the Pressure Switch state change from open to closed when the test button was 155 TRANSMISSION NGC P1775 SOLENOID SWITCH VALVE LATCHED IN TCC POSITION Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the L R Pressure Switch Sense circuit from the appropriate terminal of special tool 8815 to the Transmission Solenoid Pressure Switch Assem bly harness connector Is the resistance above 5 0 ohms Yes Repair the L R Pressure Switch Sense circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS
242. t the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the OD Solenoid Control circuit 15 the voltage above 0 5 volts Yes Repair the OD Solenoid Control circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 Turn the ignition off to the lock position Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Using a 12 volt test light connected to ground check the Transmission Control Relay Output circuit in the Solenoid Pressure Switch Assembly harness connector NOTE The test light must illuminate brightly Compare the brightness to that of a direct connection to the battery D
243. t the Transmission Solenoid Pressure Switch Assembly harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the F used B circuit and Transmission Control Relay Output circuit in the Transmission Control Relay connector Ignition on engine not running CAUTION DO PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the L R Pressure Switch Sense circuit Is the voltage above 0 5 volts Yes Repair the L R Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service I nforma tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorted and open circuits
244. tart the engine in park With the DRBIII read Transmission Is the DTC P1687 NO COMMUNICATION WITH THE MIC present Yes Replace the Powertrain Control Module WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FAC TOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete The conditions necessary to set the DTC not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorts and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 152 TRANSMISSION NGC Symptom P1694 BUS COMMUNICATION WITH ENGINE MODULE When Monitored and Set Condition P1694 BUS COMMUNICATION WITH ENGINE MODULE When Monitored Continuously with ignition key on Set Condition If no bus messages are received from the Powertrain Control Module PCM for 10 seconds Note Due to the integration of the Powertrain and Transmission Control Modules bus communication between the modules is internal POSSIBLE CAUSES POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY With the DRBIII erase Transmission All Start the Engine in Park
245. tch Valve Latched in LR Position When monitored Continuously when doing par tial or full EMCC PEMCC or FEMCC Set condition f the transmission senses the LR pressure switch closing while performing PEMCC or FEMCC This code will be set after two unsuc cessful attempts to perform PEMCC or FEMCC Theory of operation The solenoid switch valve SSV controls the direction of the transmission fluid when the LR TCC solenoid is energized SSV will bein the downshifted position in 1st gear thus directing the fluid tothe LR clutch circuits 2nd 3rd and 4th the SSV will be in the upshifted position and directs the fluid into the torque con verter clutch TCC When doing PEMCC or FEMCC the LR pres sure switch should indicate no pressure if the SSV is in the TCC position If the LR pressure switch indicates pressure while in PEMCC or FEMCC EMCC operation is aborted and inhibited to avoid inadvertent application of the LR clutch Partial EMCC will be attempted if the LR pressure switch does not indicate pressure A second detection of LR pressure results in setting the code Transmission Effects At speeds above 72 Km h 45 MPH EMCC is inhibited Once speed falls below 72 Km h 45 MPH the transmission will go into Limp in mode and the MIL will illuminate after 5 minutes of substituted operation Possible causes gt Valve body Solenoid valve stuck in LR position gt Intermittent short to ground or open circuit in
246. te brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly for all the Ground circuits Yes GoTo 5 No Repair the Ground circuit and or circuits for an open high resistance Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 38 TRANSMISSION NGC P0562 LOW BATTERY VOLTAGE Continued APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between Fused B circuit and Transmission Control Relay Output circuit in the Transmission Relay connector Ignition on engine not running CAUTION DO PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Using a 12 volt test light connected to ground check the Fused B circuit in the appropriate terminal of special tool 8815 NOTE The Test light must illuminate brightly Compare the brightness to that of a direct connection to the battery Does the test light illuminate brightly Yes GoTo 6 No Repair the Fused B Circuit circuit for an open or high resistance Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position
247. temperature Approximate times are starting temperature to warm up time 40 40 35 min 20 F 28 25 min 20 6 6 20 min 60 15 5 10 min POSSIBLE CAUSES RELATED 5 PRESENT TRANSMISSION TEMPERATURE SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for
248. tery voltage Yes Replace the Transmission Control Relay Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 8 Using the schematics as a guide inspect the wiring and connectors Repair as necessary Pay particular attention to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service I nforma tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wiring and connectors while checking for shorts and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 40 TRANSMISSION NGC Symptom List P0604 INTERNAL TCM P0605 INTERNAL P0613 INTERNAL TCM Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will 604 TCM POSSIBLE CAUSES PCM INTERNAL ERROR ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to
249. the N position all PRNDL lights will illumi nate and then back to the OD position The and OD position must be held there for at least 3 seconds in order to resume the normal OD shift schedule and electronic display gt Intermittent C1 through C4 T1 T41 or T42 circuits Check for corrosion terminal push outs or spread terminals at PCM and or TRS connec tor gt TRS gt PCM gt BCM These same symptoms may occur without the code 0706 28 setting It is possible that the invalid code that was sensed by the PCM only occurred once or twice during the given ignition key start and or did not last for longer than 0 1 second Name of code P0124 29 Throttle Position Sensor APPS Intermittent Name of code P0122 2A Throttle Position Sensor APPS Low Name of code 0123 2 Throttle Position Sensor APPS High When monitored Whenever the key is on or the engine is running Engine speed gt 500 rpm Set condition P0124 Throttle angle change gt 5 in 7 millisec onds the F ault set time milliseconds 0 448 seconds P0122 Throttle angle lt 6 the Fault Set Time 0 448 seconds P0123 Throttle angle gt 120 6 the Fault Set Time 0 448 seconds Theory of operation The transmission control ler receives the throttle position signal and its ground from the Throttle Position Sensor TPS TheTPS has a5 volt pull up supplied by the engine controller
250. the DRBIII Check the STARTS SINCE SET counter for P0755 NOTE This counter only applies to the last DTC set Is the STARTS SINCE SET counter set at 0 Yes GoTo 4 No GoTo 11 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the DRBIII actuate the 2 4 Solenoid With the Transmission Simulator monitor the 2 4 Solenoid LED Did the 2 4 Solenoid LED on the Transmission Simulator blink on and off during actuation Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Replace the Transmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector Note Check connectors Clean repair as necessary CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the 2 4 Solenoid Control circuit from the
251. the power is restored during the same key start Possible causes gt Battery voltage removed from PCM gt PCM disconnected gt Dead Battery gt Low battery voltage during cranking gt Battery Disconnect by DRBIII or MDS2 gt PCM ground circuit missing Name of code P0891 14 Transmission Relay Always On When monitored key is turned from off position to run position and or ignition key is turned from crank position to run position Set condition This code is set if the PCM senses greater than 3 volts at the Trans Relay Output switched battery terminal of the PCM prior tothe PCM energizing the relay Theory of operation The transmission control relay is used to supply power to the solenoid pack when the transmission is in normal operating mode When the relay is off no power is supplied to the solenoid pack and the transmission is in Limp in mode The relay output is fed back to the PCM It is referred to as the Transmission Control Relay Output circuit or switched battery Transmission Effects The MIL will illuminate and the transmission system defaults to Logical Limp in mode Logical Limp in mode results in the same modes of operation as Limp in Since the relay is stuck on the PCM can not open the relay and the PCM shifts to 2nd gear Possible causes gt Relay failure welded contacts gt Short to battery in 12 volt supply and or Transmission Control Relay Output circuit s gt
252. the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits Pay particular attention to the TPS signal and sensor ground circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 34 TRANSMISSION NGC Symptom 218 TEMPERATURE OPERATION ACTIVATED When Monitored and Set Condition P0218 HIGH TEMPERATURE OPERATION ACTIVATED When Monitored Whenever the engine is running NOTE This is an informational DTC designed to aid the technician in diagnosing shift quality complaints Set Condition Immediately when a Overheat shift schedule is activated when the Transmission Oil Temperature reaches 155 C or 240 F POSSIBLE CAUSES ENGINE COOLING SYSTEM MALFUNCTION TRANSMISSION OIL COOLER PLUGGED HIGH TEMPERATURE OPERATIONS ACTIVATED APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics
253. there every time the Transmission Control System checks the circuit or function is an a intermittent code Some intermittent codes such as codes P1684 12 P0891 14 0888 15 0725 18 1694 19 0871 21 0846 22 0841 24 706 28 120 29 0750 41 755 42 0760 43 0765 44 0715 56 PO720 57 1794 58 P0951 70 1799 74 0884 76 1687 77 and 1652 78 caused by wiring or connector prob lems However intermittent codes 50 54 are usu ally caused by intermittent hydraulic seal leakage in the clutch and or accumulator circuits Problems that come and go like this are the most difficult to diagnose they must be looked for under the specific conditions that cause them 3 3 4 STARTS SINCE SET COUNTER For the most recent code the Starts Since Set counter counts the number of times the vehicle has started since it was last set The counter will count up to 255 starts Note that this code only applies to the last or most recent code set When there are diagnostic trouble codes stored in memory the DRBIII will display NO DTC S PRESENT and the reset counter will show STARTS SINCE CLEAR XXX The number of starts helps determine if the diagnostic trouble code is hard or intermittent the count is less that 3 the code is usually a hard code If the count is greater than 3 it is considered an intermittent code This means that the engine has been start
254. tion All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the DRBIII actuate the L R Solenoid Monitor the L R Solenoid LED on the Transmission Simulator Did the L R Solenoid LED on the Transmission Simulator blink on and off during actuation Yes GoTo 5 No GoTo 6 If there are no possible causes remaining view repair Repair Replace the Transmission Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Turn the ignition off to the lock position Disconnect the PCM harness connector Disconnect the Transmission Solenoid Pressure Switch Assembly harness connector CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the resistance of the LR Solenoid Control circuit from the appropriate terminal of special tool 8815 to the Solenoid Pressure Switch Assembly harness connector 15 the resistance above 5 0 ohms Yes Repair the LR Solenoid Control circuit for an open Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 7 88 TR
255. tion properly The PCM contin uously monitors the PCI bus to check for messages broadcast from the PCM Transmission effects Possible improper PCM AutoStick configuration Possible causes gt Open or shorted PCI bus circuit from MIC gt MIC gt PCM Name of code 1652 78 Serial Communication Link Malfunction When monitored Continuously with key on Set condition f no PCI bus messages are received by the Transmission Control System for 10 seconds Theory of operation The PCM communicates with the other modules in the vehicle using the bus It relies on certain information to function properly The PCM continuously monitors the bus to check for messages broadcast from the certain modules Transmission Effects Possible improper PCM AutoStick configuration and delayed 3 4 shifts No EMCC and early 3 4 shifts for a few minutes after engine is started Possible causes gt Open or shorted PCI bus circuit from BCM gt Name of code P0562 79 Low Battery Voltage When monitored Continuously with engine run ning and Transmission Relay energized Set condition f the voltage sensed at the Trans mission Control Relay Output Sense circuit s to the PCM is less than 10 0 volts for the period of 15 seconds The DTC will also set if the direct battery voltage sensed in the PCM is less than 6 5v for 200ms or where Transmission Control Relay Out put Sense circuit switched battery is less
256. to OD After 3 20 seconds pump prime will return and normal operation will continue The pump should be replaced only after all other possible causes above have been checked and verified Name of code P1790 36 Fault Immediately After Shift When monitored After a gear ratio error is stored Set condition This code is set if the associated gear ratio code is stored within 1 3 seconds after a shift Theory of operation This code will only be stored along with a 50 series code If this code is set it indicates the problem is mechanical in na ture When this code exists diagnosing the trans mission should be based on the associated gear ratio code and primarily mechanical causes should be considered Transmission Effects None Possible causes gt Mechanical causes as listed under associated gear ratio code Name of code 1775 37 Solenoid Switch Valve Latched in TCC Position When monitored During an attempted shift into 1st gear Set condition This code is set if three unsuccess ful attempts are made to get into 1st gear one given key start Theory of operation The solenoid switch valve SSV controls the direction of the transmission fluid when the LR TCC solenoid is energized The SSV will bein the downshifted position in 1st gear thus directing the fluid to the L R clutch circuit In 2nd 3rd and 4th it will be in the upshifted position and directs the fluid into the torque con verter clutch TC
257. to all power and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module per the Service nforma WITH THE DRBIII PERFORM QUICK LEARN Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 58 TRANSMISSION NGC P0713 TRANSMISSION TEMPERATURE SENSOR HIGH Continued ACTION APPLICABILITY The conditions necessary to set this DTC are not present at this time All Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBII1 check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 59 TRANSMISSION NGC Symptom P0714 TRANSMISSION TEMPERATURE SENSOR INTERMITTENT When Monitored and Set Condition P0O714 TRANSMISSION TEMPERATURE SENSOR INTERMITTENT When Monitored Continuously with the ignition on and engine running Set Condition The DTC will set when the monitored Temperature Sensor voltage fluctuates or changes abruptly within a predetermined period of time POSSIBLE CAUSES RELATED 5 PRESENT TRANSMISSION TEMPERATURE SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of
258. to get into 1st gear in one given ignition start POSSIBLE CAUSES RELATED DTC P0841 PRESENT INTERMITTENT WIRING AND CONNECTORS L R PRESSURE SWITCH SENSE CIRCUIT OPEN TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN L R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND L R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE INTERNAL TRANSMISSION POWERTRAIN CONTROL MODULE ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine DTC s Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and En
259. toms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for P0706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 133 TRANSMISSION NGC P0891 TRANSMISSION RLY ALWAYS ON Continued ACTION APPLICABILITY With the DRBIII Check the STARTS SINCE SET counter for P0891 Note This counter only applies to the last DTC set Is the STARTS SINCE SET counter equal to 0 Yes GoTo 3 No GoTo 7 Turn the ignition off to the lock position Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Measure the resistance between the Fused circuit the Transmission
260. tor Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the Output Speed Sensor Signal circuit 15 the voltage above 0 5 volt Yes Repair the Output Speed Sensor Signal circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 9 68 TRANSMISSION NGC P0720 OUTPUT SPEED SENSOR ERROR Continued ACTION APPLICABILITY Turn the ignition off to the lock position All Disconnect the PCM harness connector Disconnect the TRS harness connector Remove the Transmission Control Relay Note Check connectors Clean repair as necessary Connect a jumper wire between the Fused B and Transmission Control Relay Output circuits in the Transmission Control Relay connector Ignition on engine not running CAUTION DO NOT PROBE THE PCM HARNESS CONNECTORS PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION INSTALL MILLER SPECIAL TOOL 8815 TO PERFORM DIAGNOSIS Measure the voltage of the Speed Sensor Ground circuit Is the voltage above 0 5 volts Yes Repair the Speed Sensor Ground circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 10 Using the
261. tput circuit Ignition on engine not running Measure the voltage of the L R Pressure Switch Sense circuit 15 the voltage above 0 5 volt Yes Repair the L R Pressure Switch Sense circuit for a short to voltage Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No GoTo 10 160 TRANSMISSION NGC P1776 SOLENOID SWITCH VALVE LATCHED IN LR POSITION Continued ACTION APPLICABILITY Using the schematics as a guide inspect the wiring and connectors Repair as All necessary Pay particular attention to all power and ground circuits If there no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service nforma tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set this DTC are not present at this time Test Drive and verify if the transmission is launching in 2nd gear and or no TCC engagement With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Are there 2nd gear launches and or no TCC engagement Yes Disassemble and inspect the Valve Body per the Service Informa tion and repair or replace as necessary no problems are found in the Valve Body replace the Transmission Solenoid Pressure Switch Assembly Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete
262. turn with the same problem gt Before performing Quick Learn it is impera tive that the vehicle be shifted into OD with the engine running and the oil level set tothe correct level This step will purge air from the clutch circuits to prevent erroneous clutch volume values which could cause poor initial shift quality gt If an unused PCM is installed on a vehicle with a HOT engine Quick Learn will cause the PCM to report a cold calculated oil tem perature This requires monitoring the calcu lated oil temperature using the DRBIII If the temperature is below 15 C 60 F the transmission must be run at idle or driven in gear until it goes above 15 C 60 F If the temperature is above 93 C 200 F the trans mission must cool to below 93 C 200 F gt First gear is engaged in overdrive after Quick Learn is completed Place the vehicle in park after performing Quick Learn The Quick Learn function should be performed Upon installation of a new service PCM After replacement or rebuild of internal trans mission components or the torque converter If one or more of the clutch volumes indexes 5 contain skewed readings because of abnormal conditions To perform the Quick Learn procedure the follow ing conditions must be met Itisimperative that the vehicle be shifted into OD with the engine running and the oil level set to the correct level This step will purge the air in the dutch circuits to
263. unning Set Condition The DTC will set when the monitored Temperature Sensor voltage drops below 0 078 volts for the period of 0 45 seconds POSSIBLE CAUSES RELATED PRESENT TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND TRANSMISSION TEMPERATURE SENSOR POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE
264. up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 66 TRANSMISSION NGC P0720 OUTPUT SPEED SENSOR ERROR Continued APPLICABILITY Start the engine in park Raise the drive wheels off of the ground WARNING PROPERLY SUPPORT THE VEHICLE Firmly apply the brakes and place the transmission selector in drive WARNING BE SURE TO KEEP HANDS AND FEET CLEAR OF ROTATING WHEELS Release the brakes and allow the drive wheels to spin freely Note The drive wheels must be turning at this point With the DRBIII read the Output RPM Is the Output RPM below 100 Yes GoTo 3 No GoTo 11 Turn the ignition off to the lock position All Remove the Starter Relay CAUTION Removal of the Starter Relay is to prevent a Transmission NO RESPONSE condition and disable the starter Install the Transmission Simulator Miller tool 8333 and the Electronic Transmis sion Adapter kit 8333 1A Ignition on engine not running With the Transmission Simulator set the Input Output Speed switch to the rotary switch to the 3000 1250 position With the DRBIII read the Input and Output RPM Does
265. use of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the read Transmission Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors Repair as necessary Perform the Shift Lever Position Test If the test does not pass refer to Symptom test for 706 Check Shifter Signal For Gear Ratio check and record all CVI s Most DTC s set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run NOTE Verify flash level of Powertrain Control Module Some problems are corrected by software upgrades to the Transmission and Engine software NOTE Check for applicable TSB s related to the problem Perform this procedure prior to Symptom diagnosis Continue GoTo 2 With the DRBIII erase Transmission DTCs Cycle the ignition off then start the vehicle Firmly apply the brakes and shift into Overdrive NOTE Vehicle must remain in Overdrive for at least 3 0 seconds With the brakes firmly applied shift slowly through all gears
266. uses Scenario 1 All PRNDL lights stay illuminated indefinitely in Park following a Key start gt Wrong Part Number PCM for application gt TRS connector not plugged in gt Cl through C4 T1 T41 or T42 circuits are open shorted to ground or shorted to 12 volts gt PCI bus failure Open or shorted resulting in no communication to BCM or Cluster gt TRS gt gt Scenario 2 is indicated following key start but all PRNDL lights illuminate following a shift from R to N If PRNDL lights illuminatein N and shifter is moved directly into 3 or L GENERAL INFORMATION position without pausing in OD then the OD position shift schedule and electronic display will indicate OD until the shifter is shifted into the OD position and held for at least 3 seconds gt Worn Manual Lever Rooster Comb Check for heavy wearing by TRS switch contacts gt Intermittent C1 through C4 1 T41 or T42 circuits Check for corrosion terminal push outs or spread terminals at PCM and or TRS connec tor gt TRS gt PCM gt Scenario 3 If an invalid code happens while operating in the 3 or L position the 3 or L shift schedule and electronic display will be frozen regardless of whether 3 or L is selected Thedisplay will be frozen until the shifter is moved to
267. wer and ground circuits If there are no possible causes remaining view repair Repair Replace the Powertrain Control Module the Service nforma tion WITH THE DRBIII PERFORM QUICK LEARN AND REPROGRAM PINION FACTOR Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 The conditions necessary to set the DTC are not present at this time Using the schematics as a guide inspect the wiring and connectors specific to this circuit Wiggle the wires while checking for shorted and open circuits With the DRBIII check the EATX EVENT DATA to help identify the conditions in which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 No Test Complete 110 TRANSMISSION NGC Symptom P0846 2 4 PRESSURE SWITCH SENSE CIRCUIT When Monitored and Set Condition P0846 2 4 PRESSURE SWITCH SENSE CIRCUIT When Monitored Whenever the engine is running Set Condition The DTC is set if one of the pressure switches are open or closed at the wrong time a given gear POSSIBLE CAUSES RELATED RELAY 5 PRESENT 2 4 PRESSURE SWITCH SENSE CIRCUIT OPEN TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN 2 4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND 2 4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE 2 4 PRESSURE SWITCH POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS ACTION APPLICABILITY NOTE Low fluid level ca
268. witch or switches that should be closed for a given gear are open a loss of prime test begins All available elements 1st gear LR 2 4 and OD in 2nd 3rd and 4th gear 2 4 and OD are turned on by the PCM to see if pump prime exists The code is set if none of the pressure switches respond The PCM will continue to run the loss of prime test until pump pressure returns Theory of operation The loss of prime test is used to prevent transmission faults which can be caused by a lack of pump prime Transmission Effects Vehicle will not move or transmission slips Normal operation will continue if pump prime returns Possible causes gt Low transmission fluid level gt PRNDL indicates a valid OD code the hydrau lic reverse position gt Transmission fluid filter clogged or damaged gt Transmission fluid filter improperly installed Bolts loose or O ring missing gt Oil pump If a customer has a problem when the transmission is cold Where someone shifts to reverse reverse is engaged and then shifts to OD and does not get OD gets a neutral condi tion and then can not get reverse OD for 3 20 seconds replace the oil pump High side clear ancein the oil pump will set a code 35 The pump will prime upon start up but as the torque converter purges air drain down the air will leak across the inner rotor into the pump suction port and cause a loss of prime right after the GENERAL INFORMATION shift in
269. y caused by an internal problem Verify if the problem is only experienced under extreme hot or cold conditions With the DRBIII check the EATX EVENT DATA to help identify the conditions which the DTC was set Were there any problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete With the read Transmission 5 Are the DTC s P0870 and or P0871 present also Yes Replace the Solenoid Pressure Switch Assembly per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 GoTo 6 81 TRANSMISSION NGC 734 RATIO ERROR IN 4TH Continued If there are no possible causes remaining view repair Repair APPLICABILITY All Repair internal transmission the Service Information Check all of the components related to the OD and 2 4 clutches nspect the Oil Pump and repair or replace per the Service Information Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 82 TRANSMISSION NGC Symptom P0O736 GEAR RATIO ERROR IN REVERSE When Monitored and Set Condition 0736 RATIO ERROR IN REVERSE When Monitored The Transmission gear ratio is monitored continuously while the Transmission is in gear Set Condition If the ratio of the Input RPM to the Output RPM does not match the current gear ratio POSSIBLE CAUSES RELATED PRES
270. y in terrupted then reenergized For solenoids that are not currently energized the solenoid is momen tarily energized then de energized Under both situations if an inductive spikeis not sensed by the PCM during the continuity check it is retested twice If it fails the test the third time the appro priate code is set SOLENOID APPLICATION CHART 80 14 0 Theory of operation Four solenoids are used to control the friction elements clutches The conti nuity of the solenoids circuits are periodically tested Each solenoid is turned on or off depending on its current state An inductive spike should be detected by the PCM during this test If spikeis detected the circuit is tested again to verify the failure In addition to the periodic testing the solenoid circuits are tested if a gear ratio or pres sure switch error occurs In this case one failure will result in the appropriate code being set Transmission Effects The MIL will illuminate and the transmission goes into neutral if code is set above 35 Km h 22 MPH Limp in mode when vehicle speed is below 35 Km h 22 MPH Possible causes gt Open or shorted solenoid circuit s between PCM and Transmission Solenoid Pressure Switch as sembly gt Open ground circuit gt PCM connector problems gt Solenoid Pressure Switch connector problem gt Solenoid Pressure Switch assembly gt PCM Name of code P1776 47 Solenoid Swi
271. y problems found Yes Repair as necessary GoTo 3 If the transmission shifts too early when the transmission is cold this is a normal condition The software is designed to protect the transmission from high torque and or high RPM shifts during cold operation Did the problem occur when the transmission temperature was cold Yes Thisisanormal condition The software is designed to protect the transmission from high torque and or high RPM shifts during cold operation Test Complete 177 TRANSMISSION NGC Symptom TRANSMISSION SIMULATOR 8333 WILL NOT POWER UP POSSIBLE CAUSES TRANSMISSION SIMULATOR WILL NOT POWER UP ACTION APPLICABILITY NOTE Make sure to check for any Transmission Control Relay DTCs or All conditions A stuck open Transmission Control Relay can cause the Trans mission Simulator to not Power up NOTE If the Transmission Simulator Miller tool 8333 and the Electronic Transmission Adapter kit 8333 1A will not power up make sure to check all connectors and the ground cable for proper installation If there are no possible causes remaining view repair Repair Check and repair these symptoms before having the Transmission Simulator repaired 178 VERIFICATION TESTS Verification Tests 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 APPLICABILITY 1 NOTE After completion of the Transmission Verification Test the Powertrain All Verification Test must be performed
272. y problems found Yes Repair as necessary Perform 41TE NGC TRANSMISSION VERIFICATION TEST VER 1 Test Complete 101 TRANSMISSION NGC Symptom P0841 LR PRESSURE SWITCH SENSE CIRCUIT When Monitored and Set Condition P0841 LR PRESSURE SWITCH SENSE CIRCUIT When Monitored Whenever the engine is running Set Condition The DTC is set if one of the pressure switches are open or closed at the wrong time in a given gear POSSIBLE CAUSES RELATED RELAY 5 PRESENT LOSS OF PRIME P0944 PRESENT L R PRESSURE SWITCH SENSE CIRCUIT OPEN TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN L R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND L R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE L R PRESSURE SWITCH POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS APPLICABILITY NOTE Low fluid level can be the cause of many transmission problems If All the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information NOTE Always perform diagnostics with a fully charged battery to avoid false symptoms With the DRBIII read Engine Check and repair all Engine prior to performing any transmission symptom diagnostics With the DRBIII read Transmission DTC s Record all DTC s and 1 Trip Failures NOTE Diagnose 1 Trip Failures as a fully matured DTC Using the wiring diagram schematic as a guide inspect the wiring and connectors

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