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2004 impreza service manual quick reference index

1. STR 1 2 s 4 s 6 7 8 9 1112 13 14 15 17 18 19 20 21 22 22123 24 25 26 27 28 29 30 31 32 Cito 1 2 3 5 7 DX 15 t6 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tole ME 3 415 6 s 4 e baishe 19 24 25 26 29 34 35 36 0 so 7 18 21 22 23 28 31132133 38 7118 ABS00348 No Repair the combi ON nation meter Turn the ignition switch to ON engine OFF Ref to IDI 11 Combination Meter Assembly ABS diag 27 Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK ABS AND BRAKE WARNING LIGHT BULB 1 Turn the ignition switch to OFF 2 Remove the combination meter 3 Remove the ABS warning light and brake warning light Is the ABS warning light bulb open Replace the ABS and brake warn ing light bulb Het to IDI 11 Combination Meter Assembly Go to step 3 CHECK BATTERY SHORT OF ABS HAR NESS 1 Disconnect the connector i2 from connec tor B37 2 Measure the voltage between connector i2 and chassis ground Connector amp terminal LHD i2 No 15 Chassis ground 5 RHD 12 No 1 Chassis ground Is the voltage less than 3 V Go to
2. 2731 213141516 71819 05 112131415 rA 6 e e tot 16 17 18 19 20 21 e ajajaa 12 EIGIHEI 12 13 14 15 16 23 24 27 28 29 30 31 2 26 ABS00353 ABS diag 59 300 360 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Feo __ f FRONT ABS SENSOR LH 213 7 1 1 1 1 1 1 7 1 1 1 1 1 1 1 1 1 1 1 1 5 1 1 1 1 O 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 gt 1 1 1 1 1 1 1 1 1 1 1 ul ul 1 1 z z 1 1 a a 52 i i ul ul E v E o gt 5 FRONT ABS REAR REAR SENSOR RH ABS ABS SENSOR LH SENSOR RH SHIELD JOINT CONNECTOR 11 12 13 14 15 16 17 18 19 20 21 22 16 17 18 19 20 51 6768 6 8 9 2422 27128 29 30 31 ABS diag 60 B99 14115 1 2 3 4
3. 415 6 7 819 02 13 14 15 e t7 18 19 20 21 22 TOSS ABS00356 ABS diag 72 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK GENERATOR 1 Start the engine 2 Idle after warm up 3 Measure the voltage between generator B terminal and chassis ground Terminals Generator B terminal Chassis ground Is the voltage 10 17 V Go to step 2 Repair the genera tor Ref to SC H4SO 13 Generator CHECK BATTERY TERMINAL Turn the ignition switch to OFF Are the positive and negative battery terminals tightly clamped Go to step 3 Tighten the clamp of terminal CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Disconnect the connector from ABSCM amp H U 2 Run the engine at idle 3 Operate the electric load applying devices such as the headlight A C and defogger 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 4 Chassis ground 5 RHD F49 No 1 Chassis ground Is the voltage 10 17 V Go to step 4 Repair the har ness connector between battery ignition switch and ABSCM amp H U CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Measure the resistance between ABSCM amp H U connector and chassis ground Conn
4. __ 2 1 1 1 i T 1 1 2 1 1 1 1 1 t 1 1 1 I BE gt E SHIELD JOINT RE CONNECTOR 1 1 gt 1 1 1 1 1 1 1 1 t 1 1 2 1 1 1 1 a l 1 1 1 1 o SIE AE BE i 1 1 7 1 1 1 1 T 1 1 1 1 1 1 1 1 1 1 i x 1 1 1 1 1 1 1 SIE 1 1 1 1 NIE 1 1 1 1 2 i ul ul 1 He 1 x 1 T ul ul J E z H o z z 27 E E ABS REAR REAR SENSOR LH SENSOR RH ABS ABS SENSOR LH SENSOR RH ED 873 3E 1 2 131 415 6 7 8 9 to t1 t2 t9 i415 1 2131415 ra 6171819 16 17 18 19 20 21 22 75 112 2 13 14 1516 17 18 19 20 21 22 28 24 27 28 29 30 31 500353 ABS diag 52 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL 300 360 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Feo __ f FRONT ABS SENSOR LH 213 7 1 1 1 1 1 1 7 1 1 1 1 1 1 1 1 1 1 1 1 5 1 1 1 1 O 1 1 1 1 1 1 1 1 1 1
5. 10 11 12 13 1415 16 17 18 19 20 21 22 23 24 25 26 27 ze 29 ao 31 ABS00354 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK IF THE WHEELS HAVE TURNED FREELY FOR A LONG TIME Is the wheels have been turned freely for more than one minute such as when vehicle is jacked up under full lock cornering or the tires not in contact with road surface The ABS is nor mal Erase the DTC NOTE When the wheels turn freely for a long time such as when vehicle is towed or jacked up or when steer ing wheel is contin uously turned all way this DTC may sometimes occur Go to step 2 CHECK TIRE SPECIFICATIONS Turn the ignition switch to OFF Are the tire specifications cor rect Go to step 3 Replace the tire CHECK WEAR OF TIRE Is the tire worn excessively Replace the tire Go to step 4 CHECK TIRE PRESSURE Is the tire pressure correct Go to step 5 Adjust the tire pressure CHECK INSTALLATION OF ABS WHEEL Are the ABS wheel speed sen Go to step 6 Tighten the ABS SPEED SENSOR sor installation bolts tightened wheel speed sen 33 N m 3 3 kgf m 24 ft lb sor installation bolts securely CHECK ABS WHEEL SPEED SENSOR GAP s the gap as following value Go to step 7 Adjust the gap Measure the tone wheel to ABS wheel speed Front wheel NOTE sensor piece gap over entire perimeter of the 10 3
6. Q L m E 1j GENERATOR m Q a z fe 6 IGNITION SWITCH 8108 DATA LINK CONNECTOR 5 m m HOLDER 29 840 5 o 2 ES 8264 d E 5 Co GD 7213141516718 ang 6T7T8T19Ti0 16 17 18 19 20 21 22 ti re ro r4 15 t6 17 t8 19 20 21 22 23 24 25 26 27 30 31 23 24 25 26 w 5 172 314 SIT S p ea ps e 8 O1 ABS00371 ABS diag 37 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK IGNITION SWITCH Is the ignition switch turned to ON Go to step 2 Turn the ignition switch to ON and select ABS mode using Subaru Select Monitor CHECK BATTERY 1 Turn the ignition switch to OFF 2 Measure the battery voltage Is the voltage or more 11 V Go to step 3 Charge or replace the battery CHECK BATTERY TERMINAL Is there poor contact at battery terminal Repair or tighten the battery termi nal Go to step 4 CHECK COMMUNICATION OF SUBARU SE LECT MONITOR 1 Turn the ignition switch to ON 2 Using the Subaru Select Monitor check whether communication to other system can be executed normally Are the name and year of sys tem displayed on Subaru Select Monitor Go to step 8 Go to step 5 CHECK COM
7. ABS00368 ABS diag 114 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL EB 4 7 12113 1213741516 3 5161718 27 e zo ao st 26 ABS00369 Step Check No CHECK OUTPUT OF LATERAL G SENSOR Is the voltage 2 3 2 7 V Go to step 2 Go to step 5 USING SUBARU SELECT MONITOR when lateral G sensor is in hor 1 Select Current data display amp Save on the izontal position Subaru Select Monitor 2 Read the lateral G sensor output in Subaru Select Monitor data display ABS diag 115 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nector between ABSCM amp H U and lateral G sensor Repair the con nector Go to step 3 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U G
8. um mm 213141516 71819 15 1 27 6 17 18 19 20 21 22 28 29 30 31 31151 ABS00234 ABS diag 69 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 2 Repair the ABSCM amp H U ground harness CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between battery igni tion switch and ABSCM amp H U Repair the con nector Go to step 3 CHECK SOURCES OF SIGNAL NOISE Is the car telephone or wireless transmitter properly installed Go to step 4 Properly install the car telephone or wireless transmit ter CHECK SOURCES OF SIGNAL NOISE Are noise sources such as an antenna installed near the sensor harness Install the noise sources apart from sensor harness Go to step 5 CHECK ABSCM amp H U 1 Turn the ignition switch to OFF 2 Connect all connectors 3 Erase the memory 4 Perform the inspection mode 5 Read out the DTC Is the same DTC as in current dia
9. FL INLET FL OUTLET RR INLET m RR OUTLE Ju ral e z e e t 1 2 11 te 13 14 15 16 17 18 19 20 21 22 9 15 16 19 24 25 26 29 34 35 36 stro e 2 s 11 12 13 18 21 22 23 28 31132133 38 7118 ABS00362 ABS diag 81 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Run the engine at idle 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 Chassis ground B301 No 24 Chassis ground RHD F49 No 1 4 Chassis ground F49 No 24 Chassis ground Is the voltage 10 15 V Go to step 2 Repair the har ness connector between battery and ABSCM amp H U CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 3 Re
10. Chassis ground Is the resistance less than 0 5 Q Go to step 12 Repair the open circuit in harness between ABSCM amp H U and inhibitor side con nector and poor contact in cou pling connector CHECK POOR CONTACT IN CONNECTORS Is there poor contact in control module power supply ground line and data link connector ABS diag 39 Repair the con nector Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS B NO DTC DIAGNOSIS ABS warning light circuit is shorted TROUBLE SYMPTOM ABS warning light remains on NO DTC displayed on the Subaru Select Monitor NOTE When the ABS warning light is OFF and is displayed on Subaru Select Monitor the system is normal condition ABS diag 40 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS WIRING DIAGRAM BATTERY SBF 3 SBF 1 OAD OND DH 4 Q i a a 0 IGNITION SWITCH RELAY HOLDER E No 13 B108 5 CD TURBO ENGINE MODEL Q NON TURBO ENGINE 2 MODEL e 9 METER GROUND o z z TERMINAL 5 17 12 13 18 21 22 23 28 31 32 33 38 RELAY HO
11. Go to step 9 Go to step 16 CHECK FREEZE FRAME DATA Read G sensor output on the Subaru Select Monitor display Is the G sensor output on mon itor display more than 3 65 V Go to step 10 Go to step 16 CHECK OPEN CIRCUIT IN G SENSOR OUT PUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 6 No 28 RHD F49 6 No 28 Is the resistance 4 3 4 9 kQ Go to step 11 Repair the har ness connector between G sensor and ABSCM amp H U CHECK BATTERY SHORT OF HARNESS 1 Turn the ignition switch to OFF 2 Remove the console box 3 Disconnect the connector from G sensor 4 Disconnect the connector from ABSCM amp H U 5 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 6 Chassis ground RHD F49 No 6 Chassis ground Is the voltage less than 1 V ABS diag 99 Go to step 12 Repair the har ness between G sensor and ABSCM amp H U Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK BATTERY SHORT OF HARNESS 1 Turn the ignition switch to ON 2 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal
12. 0 8 mm 0 012 0 031 Adjust the gap us wheel in ing spacer Part Rear wheel No 26755AA000 0 7 1 2 mm 0 028 0 047 If the spacers can in not correct gap re place worn sensor or worn tone wheel PREPARE OSCILLOSCOPE Is an oscilloscope available to step 8 Go to step 9 CHECK ABS WHEEL SPEED SENSOR SIG Is an oscilloscope pattern Go to step 12 Go to step 9 NAL 1 Raise all four wheels off ground 2 Turn the ignition switch to OFF 3 Connect the oscilloscope to the connector 4 Turn the ignition switch to ON 5 Rotate the wheels and measure voltage at specified frequency lt Ref to ABS diag 15 WAVEFORM Control Module I O Signal gt NOTE When this inspection is completed ABSCM amp H U sometimes stores the DTC 29 Connector amp terminal Front RH LHD B15 No 1 No 2 RHD F95 1 2 Front LH LHD B62 No 20 No 24 RHD F94 No 1 No 2 Rear RH LHD B99 No 10 No 9 RHD B99 No 32 No 31 Rear LH LHD B99 5 4 RHD B99 No 21 22 smooth as shown in the fig ure ABS diag 61 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK CONTAMINATION OF ABS WHEEL SPEED SENSOR OR TONE WHEEL Remove the disc rotor or drum from hub Is the ABS wheel speed sen Sor piece or tone whee
13. Chassis ground RHD B37 No 1 Chassis ground Is the voltage less than 3 V ABS diag 28 Go to step 8 Repair battery short in the wiring harness Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 9 Repair open circuit in the ABSCM amp H U ground harness CHECK WIRING HARNESS Measure the resistance between connector B37 and chassis ground Connector amp terminal LHD B37 No 15 Chassis ground RHD B37 No 1 Chassis ground Is the resistance less than 0 5 Q Go to step 10 Repair open circuit in the harness connector CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nectors between combination meter and ABSCM amp H U ABS diag 29 Repair the con nector Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS B ABS WARNING LIGHT DOES NOT G
14. 1 1 1 1 1 1 1 1 1 1 1 1 gt 1 1 1 1 1 1 1 1 1 1 1 ul ul 1 1 z z 1 1 a a 52 i i ul ul E v E o gt 5 FRONT ABS REAR REAR SENSOR RH ABS ABS SENSOR LH SENSOR RH SHIELD JOINT CONNECTOR 11 12 13 14 15 16 17 18 19 20 21 22 16 17 18 19 20 51 6768 6 8 9 2422 27128 29 30 31 ABS diag 53 B99 14115 1 2 3 4 10 11 12 13 1415 16 17 18 19 20 21 22 23 24 25 26 27 ze 29 ao 31 ABS00354 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK OUTPUT OF ABS WHEEL SPEED SENSOR USING SUBARU SELECT MONI TOR 1 Select Current data display amp Save on the Subaru Select Monitor 2 Read the ABS wheel speed sensor output corresponding to faulty system in the Subaru Select Monitor data display mode Does the speed indicated on display change in response to speedometer reading during acceleration deceleration when the steering wheel is in straight ahead position Go to step 2 Go to step 8 CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nectors between ABSCM amp H U and ABS wheel speed sensor Repair the con nector Go to step 3 CHECK SOURCES OF SI
15. 19 20 21 22 27 28 29 30 31 23 26 Nj mp ABS00368 ABS diag 110 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL EB 4 7 12113 1213741516 3 5161718 27 e zo ao st 26 ABS00369 Step Check No CHECK OUTPUT OF LATERAL G SENSOR 15 the lateral G sensor output Go to step 2 Go to step 5 USING SUBARU SELECT MONITOR on monitor display 2 3 2 7 V 1 Select Current data display amp Save on the when lateral G sensor is in hor Subaru Select Monitor izontal position 2 Read the lateral G sensor output in Subaru Select Monitor data display ABS diag 111 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nector between ABSCM amp H U and lateral G sensor Repair the con nector Go to step 3 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the
16. 4 Read out the DTC CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the A temporary poor diagnosis corre contact sponding to DTC Check the harness and connectors between AB SCM amp H U and ABS wheel speed sensor G DTC 22 FRONT RIGHT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL NOTE For the diagnostic procedure refer to DTC 28 Ref to ABS diag 52 DTC 28 REAR LEFT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL Diagnostics Procedure with Diagnostic Trouble Code DTC gt H DTC 24 FRONT LEFT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL NOTE For the diagnostic procedure refer to DTC 28 Ref to ABS diag 52 DTC 28 REAR LEFT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL Diagnostics Procedure with Diagnostic Trouble Code DTC gt I DTC 26 REAR RIGHT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL NOTE For the diagnostic procedure refer to DTC 28 Ref to ABS diag 52 DTC 28 REAR LEFT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL Diagnostics Procedure with Diagnostic Trouble Code DTC gt ABS diag 51 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS J DTC 28 REAR LEFT ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL DIAGNOSIS Faulty ABS wheel speed sensor signal noise irregular signal etc Faulty harness connector TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM LHD MODEL o re EB 029 1 0 1 1
17. ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U C DTC 21 OPEN OR SHORT CIRCUIT IN FRONT RIGHT ABS WHEEL SPEED SENSOR CIRCUIT NOTE For the diagnostic procedure refer to DTC 27 Ref to ABS diag 44 DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS WHEEL SPEED SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trouble Code DTC gt D DTC 23 OPEN OR SHORT CIRCUIT IN FRONT LEFT ABS WHEEL SPEED SENSOR CIRCUIT NOTE For the diagnostic procedure refer to DTC 27 Ref to ABS diag 44 DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS WHEEL SPEED SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trouble Code DTC gt E DTC 25 OPEN OR SHORT CIRCUIT IN REAR RIGHT ABS WHEEL SPEED SENSOR CIRCUIT NOTE For the diagnostic procedure refer to DTC 27 Ref to ABS diag 44 DTC 27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS WHEEL SPEED SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trouble Code DTC gt ABS diag 43 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS F DTC27 OPEN OR SHORT CIRCUIT IN REAR LEFT ABS WHEEL SPEED SEN SOR CIRCUIT DIAGNOSIS Faulty ABS wheel speed sensor Broken wire input voltage too high Faulty harness connector TROUBLE SYMPTOM ABS does not operate ABS diag 44 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS WIRING DIAGRAM LHD MODEL ABSCM amp H U be Fe hel
18. Ref to ABS diag 102 DTC 56 ABNORMAL G SEN SOR HIGH m OUTPUT Diagnostics Procedure with Diagnostic Trouble Code DTC gt Detection of G sen sor stick Detection of G sen Sor stick Ref to ABS diag 106 DTC 56 DETECTION OF G SENSOR STICK Diagnostics Procedure with Diagnostic Trouble Code DTC gt Open or short circuit in Lateral G sensor circuit Open or short circuit in Lateral G sensor circuit Ref to ABS diag 110 DTC 73 OPEN OR SHORT CIRCUIT IN LATERAL G SENSOR CIRCUIT Diagnos tics Procedure with Diagnostic Trouble Code DTC gt Battery short in Lat eral G sensor circuit Battery short in Lat eral G sensor circuit Ref to ABS diag 114 DTC 73 BATTERY SHORT IN LATERAL G SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trouble Code DTC gt Abnormal Lateral G sensor high u output Abnormal Lateral G sensor high u output Ref to ABS diag 119 DTC 73 ABNORMAL LATERAL G SENSOR HIGH m OUTPUT Diagnostics Procedure with Diagnostic Trouble Code DTC gt Detection of Lateral G sensor stick Detection of Lateral G sensor stick Ref to ABS diag 123 DTC 73 DETECTION OF LAT ERAL G SENSOR STICK Diagnostics Procedure with Diagnostic Trouble Code DTC gt ABS diag 25 Diagnostics Procedure without Diagnostic Trouble Code ABS DIAGNOSTICS 12 Diagnostics Procedure without Diagnostic Trouble Code DTC A ABS WARNING LIGHT DOES
19. Sub code No List of Diagnostic Trouble Code DTC Display screen Contents of diagnosis ABS DIAGNOSTICS Index No 10A1 Open circuit in motor relay circuit Open circuit in motor relay circuit Ref to ABS diag 85 DTC 52 OPEN CIRCUIT IN MOTOR RELAY CIRCUIT Diagnostics Procedure with Diagnostic Trouble Code DTC gt Motor relay ON fail ure Motor relay ON fail ure Ref to ABS diag 87 DTC 52 MOTOR RELAY ON FAILURE Diagnostics Procedure with Diagnostic Trou ble Code gt Motor malfunction Motor malfunction Ref to ABS diag 89 DTC 52 MOTOR MALFUNC TION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Stop light switch sig nal circuit malfunc tion Stop light switch sig nal circuit malfunction Ref to ABS diag 91 DTC 54 STOP LIGHT SWITCH SIGNAL CIRCUIT MALFUNCTION Diagnostics Proce dure with Diagnostic Trouble Code gt Open or short circuit in G sensor circuit Open or short circuit in G sensor circuit Ref to ABS diag 93 DTC 56 OPEN OR SHORT CIR CUIT IN G SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trouble Code DTC gt Battery short in G sensor circuit Battery short in G sensor circuit Ref to ABS diag 97 DTC 56 BATTERY SHORT IN G SENSOR CIRCUIT Diagnostics Procedure with Diag nostic Trouble Code DTC gt Abnormal G sensor high output Abnormal G sensor high output
20. nector Replace the ABSCM only lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS C BRAKE WARNING LIGHT DO NOT GO OFF DIAGNOSIS Brake warning light circuit is shorted Faulty sensor connector TROUBLE SYMPTOM After starting the engine brake warning light is kept ON even if the parking brake lever has been released WIRING DIAGRAM LHD MODEL BATTERY SBF 1 SBF 4 IGNITION SWITCH NO 13 BRAKE FLUID LEVEL SWITCH PARKING BRAKE o SWITCH ABSCM amp H U 172131415 6171819 10 11 12 13114 15 neleh s 2ra paloja TO OO Cy 1 _____ 4 1213 41516 8 9 1011112013114 112131415 6 7 81910 1 4 25 26 Lj 3 415116 8 9 10 11 3114 15 16 17 18 19 20121122123124 ABS00477 ABS diag 34 Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL BATTERY IGNITION SWITCH NO 13 PARKING COMBINATION BRAKE METER 7 BRAKE FLUID 1 LEVEL WARNING cm CAS STi MODEL DRIVER S CONTROL CENTER DIFFERENTIAL CONTROL MODULE lt EXCEPT FOR STi MODEL BRAKE FLUID LEVEL SWITCH GENERATOR cC B i10 B99 PARKI
21. 33 N m 3 3 kgf m 24 ft lb Go to step 3 Tighten the ABS wheel speed sen sor installation bolts securely CHECK ABS WHEEL SPEED SENSOR GAP Measure the tone wheel to ABS wheel speed sensor piece gap over entire perimeter of the wheel Is the gap as following value Front wheel 0 3 0 8 mm 0 012 0 031 in Rear wheel 0 7 1 2 mm 0 028 0 047 in Go to step 4 Adjust the gap NOTE Adjust the gap us ing spacers Part No 26755AA000 If the spacers can not correct gap re place worn sensor or worn tone wheel CHECK TONE WHEEL RUNOUT Measure the tone wheel runout Is the runout less than 0 05 mm 0 0020 in Go to step 5 Replace the tone wheel Front lt Ref to ABS 19 Front Tone Wheel gt Rear lt Ref to ABS 20 Rear Tone Wheel gt CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nectors between ABSCM amp H U and ABS wheel speed sensor Repair the con nector Go to step 6 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 7 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 47 Proceed with
22. 7 1 1 1 1 1 1 1 1 1 1 1 1 5 1 1 1 1 O 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 gt 1 1 1 1 1 1 1 1 1 1 1 ul ul 1 1 z z 1 1 a a 52 i i ul ul E v E o gt 5 FRONT ABS REAR REAR SENSOR RH ABS ABS SENSOR LH SENSOR RH SHIELD JOINT CONNECTOR 11 12 13 14 15 16 17 18 19 20 21 22 16 17 18 19 20 51 6768 6 8 9 2422 27128 29 30 31 ABS diag 46 B99 14115 1 2 3 4 10 11 12 13 1415 16 17 18 19 20 21 22 23 24 25 26 27 ze 29 ao 31 ABS00354 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK OUTPUT OF ABS WHEEL SPEED SENSOR USING SUBARU SELECT MONI TOR 1 Select Current data display amp Save on the Subaru Select Monitor 2 Read the ABS wheel speed sensor output corresponding to faulty system in the Subaru Select Monitor data display mode Does the speed indicated on display change in response to speedometer reading during acceleration deceleration when the steering wheel is in straight ahead position Go to step 2 Go to step 8 CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR Are the ABS wheel speed sen sor installation bolts tightened
23. ABS DIAGNOSTICS 11 List of Diagnostic Trouble Code DTC A LIST 1 WITHOUT SUBARU SELECT MONITOR Contents of diagnosis Index No ABS warning light does not illuminate DTC gt lt Ref to ABS diag 26 ABS WARNING LIGHT DOES NOT COME ON Diagnostics Procedure without Diagnostic Trouble Code ABS warning light remains on DTC gt lt Ref to ABS diag 30 ABS WARNING LIGHT DOES NOT GO OFF Diagnostics Procedure without Diagnostic Trouble Code Brake warning light remains on DTC gt 2 WITH SUBARU SELECT MONITOR Sub code No Display screen Contents of diagnosis lt Ref to ABS diag 34 BRAKE WARNING LIGHT DO NOT GO OFF Diagnostics Procedure without Diagnostic Trouble Code Index No Communication for initializing impossible Subaru Select Moni tor communication failure lt Ref to ABS diag 37 COMMUNICATION FOR INI TIALIZING IMPOSSIBLE Diagnostics Procedure with Diagnostic Trouble Code DTC gt Although no DTC appears on the Sub aru Select Monitor display the ABS warning light remains on lt Ref to ABS diag 40 NO DTC Diagnostics Procedure with Diagnostic Trouble Code DTC gt 4A02 Open or short circuit in Front ABS wheel speed sensor cir cuit Open or short circuit in Front ABS wheel speed sensor cir cuit Ref to ABS diag 43 DTC 21 OPEN OR SHORT CIR CUIT INFRONT RIGHT ABS WHEEL SPEED SENSOR CIRC
24. Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK OUTPUT OF STOP LIGHT SWITCH USING SUBARU SELECT MONITOR 1 Depress the brake pedal 2 Read the stop light switch output in Subaru Select Monitor data display Is the reading indicated on monitor display 10 15 V Go to step 5 Go to step 3 CHECK IF STOP LIGHTS COME ON Depress the brake pedal Do the stop lights turn on Go to step 4 Repair the stop lights circuit CHECK OPEN CIRCUIT IN HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Depress the brake pedal 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 2 Chassis ground RHD F49 No 2 Chassis ground Is the voltage 10 15 V Go to step 5 Repair the har ness between stop light switch and ABSCM amp H U con nector CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nector between stop light switch and ABSCM amp H U Go to step 6 Repair the con nector CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC 15 the same DTC as in current diagnosis still being output Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to
25. Go to step 9 Tighten the ABS wheel speed sen sor installation bolts securely CHECK ABS WHEEL SPEED SENSOR GAP Measure the tone wheel to ABS wheel speed sensor piece gap over entire perimeter of wheel Is the gap as following value Front wheel 0 3 0 8 mm 0 012 0 031 in Rear wheel 0 7 1 2 mm 0 028 0 047 in Go to step 10 Adjust the gap NOTE Adjust the gap us ing spacer Part No 26755AA000 If the spacers can not correct gap re place worn sensor or worn tone wheel PREPARE OSCILLOSCOPE Is an oscilloscope available ABS diag 54 Go to step 11 Go to step 12 Diagnostics Procedure with Diagnostic Trouble Code ABS DIAGNOSTICS Step Check Yes No CHECK ABS WHEEL SPEED SENSOR SIG NAL 1 Raise all four wheels off ground 2 Turn the ignition switch to OFF 3 Connect the oscilloscope to the connector 4 the ignition switch to ON 5 Rotate the wheels and measure voltage at specified frequency Ref to ABS diag 15 WAVEFORM Control Module Signal NOTE When this inspection is completed the ABSCM amp H U sometimes stores DTC 29 or DTC 56 Connector amp terminal DTC 22 LHD B15 No 1 No 2 RHD F95 No 1 No 2 DTC 24 LHD B62 No 20 No 24 RHD F94 No 1 No 2 DTC 26 LHD B99 No 10 No 9 RHD B99 No 32 No 31 DTC 28
26. WIRING DIAGRAM LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167 19 20 21 22 27 28 29 30 31 23 26 Nj mp ABS00368 ABS diag 123 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL 5 rA 6 7 8 9 STA 4 9 10 11 12 13 14 15 8 19 20 21 22 516 7 8 19 20 21 22 T 23 24 25 26 S a gt fam E sH Bn C ABS00369 Step Check No CHECK ALL FOUR WHEELS FOR FREE Have the wheels been turned The ABS is nor to step 2 TURNING freely such as when vehicle is mal Erase the lifted up or operated on roll DTC ing road ABS diag 124 Diagnostics Procedure with Diagnostic Trouble Co
27. Wheel speed detected by Rear ABS wheel speed sensor RH is displayed in km h or mile h RL wheel speed Wheel speed detected by Rear ABS wheel speed sensor LH is displayed in km h or mile h Stop light switch Stop light switch monitor voltage is dis played G sensor output voltage Refers to vehicle acceleration detecting by analog G sensor It appears on the Subaru Select Monitor display in volts Lateral G sen sor output volt age Voltage equivalent to Lateral G detected by analog Lateral G sensor is displayed 7 ON OFF DATA ARE DISPLAYED Display screen Contents to be monitored Stop light switch Stop light switch signal Valve relay signal Valve relay signal Motor relay signal Motor relay signal ABS signal to TCM ABS operation signal from ABS con trol module to TCM ABS warning light ABS warning light Valve relay monitor Valve relay operation monitor signal Motor relay monitor Motor relay operation monitor signal signal ABS diag 18 ABS operation signal from ABS con trol module to TCM Read Diagnostic Trouble Code DTC ABS DIAGNOSTICS 7 Read Diagnostic Trouble Code DTC A OPERATION Refer to SUBARU SELECT MONITOR for informa tion about how to obtain and understand DTCs Ref to ABS diag 16 Subaru Select Monitor ABS diag 19 Inspection Mode ABS DIAGNOSTICS 8 Inspection Mode A OPER
28. connector terminals Connector amp terminal B257 No 2 No 3 Is the voltage 3 3 3 7 V when lateral G sensor is inclined right to 90 ABS diag 125 Go to step 11 Replace the lateral G sensor Ref to ABS 23 Lateral G Sensor Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK LATERAL G SENSOR Is the voltage 0 5 0 9 V Go to step 12 Replace the lateral Measure the voltage between lateral sensor when lateral sensor is G sensor Ref to connector terminals inclined left to 90 ABS 23 Lateral G Connector amp terminal Sensor B257 No 2 No 3 CHECK ABSCM amp H U Is the same DTC as in current Replace the Go to step 13 1 Turn the ignition switch to OFF diagnosis still being output ABSCM only 2 Connect all connectors Ref to ABS 6 3 Erase the memory ABS Control Mod 4 Perform the inspection mode ule and Hydraulic 5 Read out the DTC Control Unit ABSCM amp H U CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the A temporary poor diagnosis corre contact sponding to DTC ABS diag 126 General Diagnostics Table ABS DIAGNOSTICS 14 General Diagnostics Table A INSPECTION Symptom Probable faulty units parts Vehicle instability during braking Vehicle pulls to either side ABSCM amp H U solenoid valve ABS wheel spee
29. nector Go to step 21 CHECK SOURCES OF SIGNAL NOISE Is the car telephone or the wireless transmitter properly installed Go to step 22 Properly install the car telephone or wireless transmit ter CHECK SOURCES OF SIGNAL NOISE Are noise sources such as an antenna installed near the sensor harness Install the noise sources apart from sensor harness Go to step 23 CHECK SHIELD CIRCUIT 1 Connect all connectors 2 Measure the resistance between shield con nector and chassis ground Connector amp terminal DTC 22 LHD B303 No 2 Chassis ground RHD F62 No 2 Chassis ground DTC 24 LHD B303 No 1 Chassis ground RHD F62 No 1 Chassis ground NOTE If the DTC is 26 28 Go to YES Is the resistance less than 0 5 Q Go to step 24 Repair the shield harness CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Go to step 25 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 57 Proceed with the diagnosis corre sponding to DTC A temporary noise interference NOTE Although the ABS warning light re mains illuminating at this point this is a normal condi
30. 33 N m 3 3 kgf m 24 ft lb ABS diag 49 Go to step 15 Tighten the ABS wheel speed sen sor installation bolts securely Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK ABS WHEEL SPEED SENSOR GAP Measure the tone wheel to ABS wheel speed sensor piece gap over entire perimeter of the wheel Is the gap as following value Front wheel 0 3 0 8 mm 0 012 0 031 in Rear wheel 0 7 1 2 mm 0 028 0 047 in Go to step 16 Adjust the gap NOTE Adjust the gap us ing spacers Part No 26755AA000 If the spacers can not correct gap re place worn sensor or worn tone wheel CHECK TONE WHEEL RUNOUT Measure the tone wheel runout Is the runout less than 0 05 mm 0 0020 in Go to step 17 Replace the tone wheel Front lt Ref to ABS 19 Front Tone Wheel gt Rear lt Ref to ABS 20 Rear Tone Wheel gt CHECK GROUND SHORT OF ABS WHEEL SPEED SENSOR 1 Turn the ignition switch to ON 2 Measure the resistance between ABS wheel speed sensor and chassis ground Terminals Front RH No 1 Chassis ground Front LH No 1 Chassis ground Rear RH No 1 Chassis ground Rear LH No 1 Chassis ground Is the resistance more than 1 MQ Go to step 18 Replace the ABS wheel speed sen sor and ABSCM amp H U Front Ref to ABS 13 Front ABS Wheel Speed Sensor Rear Ref
31. 5 5 J8 029 1 0 1 1 x l l 1 1 1 1 2 I 1 1 be 1 1 we 1 SIE aie gt SHIELD JOINT 1 1 1 1 1 d 1 1 lt 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I I lt 1 1 1 1 7 1 I 1 nik 1 1 1 1 I 1 1 1 1 1 I 1 lt i 1 1 I 1 1 1 I 1 I 1 I 1 1 1 ZU I 1 I 1 B uj i i E I 1 Se 1 a a I 1 E z e r o 27 6 FRONT ABS REAR REAR SENSOR LH SENSOR RH ABS ABS SENSOR LH SENSOR RH 9 GD 20 2731 213141516 71819 05 112131415 rA 6 e e tot 16 17 18 19 20 21 e ajajaa 12 EIGIHEI 12 13 14 15 16 23 24 27 28 29 30 31 2 26 ABS00353 ABS diag 45 300 360 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Feo __ f FRONT ABS SENSOR LH 213 7 1 1 1 1 1 1
32. 5 6 7 8 8 19 20 21 22 16117 pee zs oa 2s N Az S a gt A N at ABS00369 Step Check No CHECK OUTPUT OF LATERAL G SENSOR Is the voltage 2 3 2 7 V Go to step 2 Go to step 6 USING SUBARU SELECT MONITOR when Lateral G sensor is in 1 Select Current data display amp Save on the horizontal position Subaru Select Monitor 2 Read Lateral G sensor output on the Subaru Select Monitor display ABS diag 120 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nector between ABSCM amp H U and lateral G sensor Repair the con nector Go to step 3 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 4 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK OPEN CIRCUIT IN LATERAL G SEN SOR OUTPUT HARN
33. Go to step 6 Repair the har ness connector between G sensor and ABSCM amp H U CHECK OPEN CIRCUIT IN G SENSOR OUT PUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 6 No 28 RHD F49 No 6 No 28 Is the resistance 5 0 5 6 kQ Go to step 7 Repair the har ness connector between G sensor and ABSCM amp H U CHECK GROUND SHORT IN G SENSOR OUTPUT HARNESS 1 Disconnect the connector from G sensor 2 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 6 Chassis ground RHD F49 No 6 Chassis ground Is the resistance more than 1 MQ Go to step 8 Repair the har ness between G sensor and ABSCM amp H U CHECK G SENSOR 1 Connect the connector to G sensor 2 Connect the connector to ABSCM amp H U the ignition switch to ON 4 Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 No 3 Is the voltage 2 1 2 5 V when G sensor is in horizontal position Go to step 9 Replace the G sensor Hef to ABS 21 G Sen sor gt CHECK G SENSOR Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 No 3 Is th
34. H U gt Go to step 7 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK OPEN CIRCUIT IN G SENSOR OUT PUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 6 No 28 RHD F49 No 6 No 28 Is the resistance 5 0 5 6 kQ Go to step 9 Repair the har ness connector between G sensor and ABSCM amp H U CHECK G SENSOR 1 Remove the console box 2 Remove the G sensor from vehicle 3 Connect the connector to G sensor 4 Connect the connector to ABSCM amp H U 5 Turn the ignition switch to ON 6 Measure the voltage between G sensor con nector terminals Connector amp terminal B292 2 No 3 Is the voltage 2 1 2 5 V when G sensor is in horizontal position Go to step 10 Replace the G sensor lt Ref to ABS 21 G Sen sor gt CHECK G SENSOR Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 No 3 15 the voltage 3 7 4 1 when G sensor is inclined for wards to 90 ABS diag 108 Go to step 11 Replace the G sensor lt Ref to ABS 21 G Sen sor gt Diagnostics Procedure with Diagnostic Trouble Co
35. LHD B301 No 7 No 8 RHD F49 7 8 Is the resistance as following value Front 1 1 5 Rear 1 025 1 265 kQ Go to step 18 Repair the har ness connector between ABSCM amp H U and ABS wheel speed sensor CHECK GROUND SHORT OF HARNESS Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal DTC 22 LHD B301 No 11 Chassis ground RHD F49 No 11 Chassis ground DTC 24 LHD B301 No 9 Chassis ground RHD F49 No 9 Chassis ground DTC 26 LHD B301 No 14 Chassis ground RHD F49 No 14 Chassis ground DTC 28 LHD B301 No 7 Chassis ground RHD F49 No 7 Chassis ground Is the resistance more than 1 MQ ABS diag 56 Go to step 19 Repair the har ness connector between ABSCM amp H U and ABS wheel speed sensor Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK GROUND CIRCUIT OF ABSCM amp H U Measure the resistance between ABSCM amp H U and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 20 Repair the ABSCM amp H U ground harness CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between ABSCM amp H U and ABS wheel speed sensor Repair the con
36. No 3 CHECK POOR CONTACT IN CONNECTORS 15 there poor contact in Repair the con Go to step 12 Turn the ignition switch to OFF nector between ABSCM amp H U and lateral G sensor CHECK ABSCM amp H U Is the same DTC as in current Replace the Go to step 13 1 Connect all connectors diagnosis still being output only 2 Erase the memory lt Ref to ABS 6 3 Perform the inspection mode ABS Control Mod 4 Read out the DTC ule and Hydraulic Control Unit ABSCM amp H U gt CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the A temporary poor diagnosis corre sponding to DTC ABS diag 113 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AJ DTC 73 BATTERY SHORT IN LATERAL G SENSOR CIRCUIT DIAGNOSIS Faulty Lateral G sensor output voltage TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167 19 20 21 22 27 28 29 30 31 23 26 Nj mp
37. X DTC 44 ABS AT CONTROL CONTROLLED DIAGNOSIS Combination of AT control faults TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM Co ABSCM amp H U 1 LHD sr HTZISERTS 512 492 SEE STIS ABS00360 ABS diag 79 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK BATTERY SHORT OF HARNESS 1 Turn the ignition switch to OFF 2 Disconnect all connectors from TCM 3 Disconnect the connector from ABSCM amp H U 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 3 Chassis ground RHD F49 No 3 Chassis ground Is the voltage less than 1 V Go to step 2 Repair the har ness between TCM and ABSCM amp H U CHECK BATTERY SHORT OF HARNESS 1 Turn the ignition switch to ON 2 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 3 4 Chassis ground RHD F49 No 3 Chassis ground Is the voltage less than 1 V Go to step 3 Repair the har ness between TCM and ABSCM amp H U CHECK OPEN CIRCUIT OF HARNESS 1 Turn the ignition switch to OFF 2 Connect all connectors to TCM the ignition switch to ON 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector a
38. Yes No CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nector between ABSCM amp H U and G sensor Repair the con nector Go to step 3 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Go to step 4 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK FREEZE FRAME DATA 1 Select Freeze frame data on the Subaru Select Monitor 2 Read front right wheel speed on the Subaru Select Monitor display Is the front right wheel speed on monitor display O km h 0 MPH Go to step 6 Go to step 16 CHECK FREEZE FRAME DATA Read front left wheel speed on the Subaru Select Monitor display Is the front left wheel speed on monitor display O km h 0 MPH Go to step 7 Go to step 16 CHECK FREEZE FRAME DATA Read rear right wheel speed on the Subaru Select Monitor display Is the rear right wheel speed on monitor display O km h 0 MPH Go to step 8 Go to step 16 CHECK FREEZE FRAME DATA Read rear left wheel speed on the Subaru Select Monitor display Is the rear left wheel speed on monitor display 0 km h 0 MPH
39. h or MPH displayed RR Wheel Speed Wheel speed detected by Rear ABS wheel speed sensor RH is km h or MPH displayed RL Wheel Speed pur speed detected by Rear ABS wheel speed sensor LH is dis km h or MPH Stop Light Switch Stop light switch signal ON or OFF Stop Light Switch Stop light switch monitor voltage is displayed V G Sensor Output Signal Voltage equivalent to vehicle acceleration detected by analog G V sensor is displayed Lateral G Sensor Output Sig Lateral G detected by Lateral G sensor is displayed in voltage STi V nal model Valve Relay Signal Valve Relay Signal ON or OFF Motor Relay Signal Motor Relay Signal ON or OFF ABS Signal to TCM ABS operation signal from ABS control module to TCM ON or OFF ABS Warning Lamp ON operation of ABS warning light is displayed ON or OFF EBD Warning Light ON operation of EBD warning light is displayed ON or OFF Motor Relay Monitor Operating condition of motor relay is displayed ON or OFF Valve Relay Monitor Operating condition of the valve relay is displayed ON or OFF Signal ABS operation signal from ABS control module to TCM ON or OFF NOTE For detailed operation procedure refer to the SUBARU SELECT MONITOR OPERATION MANUAL 3 CLEAR MEMORY MODE NOTE 1 On the Main Menu display screen select the For detailed operation procedure refer to the SUB 2 Each System Check and press YES key ARU SELECT MONITOR OPERATION MANUAL 2 On the System Select Menu display screen 4 ABS
40. outlet valve RH malfunction Ref to ABS diag 65 DTC 32 FRONT RIGHT OUTLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Front inlet valve LH malfunction Front inlet valve LH malfunction Ref to ABS diag 62 DTC 33 FRONT LEFT INLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Front outlet valve LH malfunction Front outlet valve LH malfunction Ref to ABS diag 65 DTC 34 FRONT LEFT OUTLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Rear inlet valve RH malfunction Rear inlet valve RH malfunction Ref to ABS diag 62 DTC 35 REAR RIGHT INLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Rear outlet valve RH malfunction Rear outlet valve RH malfunction Ref to ABS diag 65 DTC 36 REAR RIGHT OUTLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Rear inlet valve LH malfunction Rear inlet valve LH malfunction Ref to ABS diag 63 DTC 37 REAR LEFT INLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt 3E00 Rear outlet valve LH malfunction Rear outlet valve LH malfunction lt Ref to ABS diag 66 DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt 02A0 0040 0020 02CO0 OOEO 0340 0140 0160
41. step 4 Repair battery short in the warn ing light harness CHECK BATTERY SHORT OF ABS AND BRAKE WARNING LIGHT HARNESS 1 Turn the ignition switch to ON 2 Measure the voltage between connector i2 and chassis ground Connector amp terminal LHD i2 No 15 Chassis ground RHD 12 No 1 Chassis ground Is the voltage less than 3 V Go to step 5 Repair battery short in the warn ing light harness CHECK WIRING HARNESS 1 Turn the ignition switch to OFF 2 Install the combination meter 3 Turn the ignition switch to ON 4 Measure the voltage between connector i2 and chassis ground Connector amp terminal LHD i2 No 15 Chassis ground RHD 12 1 Chassis ground Is the voltage 10 15 V Go to step 6 Repair open circuit in the wiring har ness CHECK BATTERY SHORT OF ABS AND BRAKE WARNING LIGHT HARNESS 1 Turn the ignition switch to OFF 2 Measure the voltage between connector B37 and chassis ground Connector amp terminal LHD B37 No 15 Chassis ground RHD B37 1 Chassis ground Is the voltage less than 3 V Go to step 7 Repair battery short in the wiring harness CHECK BATTERY SHORT OF ABS AND BRAKE WARNING LIGHT HARNESS 1 Turn the ignition switch to ON 2 Measure the voltage between connector B37 and chassis ground Connector amp terminal LHD B37 No 15
42. step 7 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 92 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AE DTC 56 OPEN OR SHORT CIRCUIT IN G SENSOR CIRCUIT DIAGNOSIS Faulty G sensor output voltage TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167 19 20 21 22 27 28 29 30 31 23 26 Nj mp ABS00368 ABS diag 93 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL EB 4 7 12113 1213741516 3 5161718 27 e zo ao st 26 ABS00369 Step Check N
43. terminal LHD B301 No 26 Chassis ground RHD F49 No 26 Chassis ground Is the resistance less than 0 5 Q Go to step 3 Repair the ABSCM amp H U ground harness CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Run the engine at idle 2 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 4 Chassis ground RHD F49 No 1 Chassis ground Is the voltage 10 15 V Go to step 4 Repair the har ness connector between battery ignition switch and ABSCM amp H U CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 5 Repair the ABSCM amp H U ground harness CHECK MOTOR OPERATION Operate the sequence control Ref to ABS 10 ABS Sequence Control NOTE Use the diagnosis connector to operate se quence control Can motor revolution noise buzz be heard when carrying out the sequence control Go to step 6 Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U gt CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nector between generato
44. the diagnosis corre sponding to DTC A temporary poor contact NOTE Check the harness and connectors between AB SCM amp H U and ABS wheel speed sensor Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK ABS WHEEL SPEED SENSOR 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABS wheel speed sensor 3 Measure the resistance of ABS wheel speed sensor connector terminals while shaking the harness lightly Terminals Front RH No 1 No 2 Front LH No 1 No 2 Rear RH No 1 No 2 Rear LH No 1 No 2 Is the resistance as following value Front 1 1 5 Rear 1 025 1 265 Go to step 9 Replace the ABS wheel speed sen sor Front Ref to ABS 13 Front ABS Wheel Speed Sensor Rear Ref to ABS 16 Rear ABS Wheel Speed Sensor CHECK BATTERY SHORT OF ABS WHEEL SPEED SENSOR 1 Disconnect the connector from ABSCM amp H U 2 Measure the voltage between ABS wheel speed sensor and chassis ground Terminals Front RH No 1 4 Chassis ground Front LH No 1 Chassis ground Rear No 1 Chassis ground Rear LH 1 Chassis ground Is the voltage less than 1 V Go to step 10 Replace the ABS wheel speed sen sor Front Ref to ABS 13 Front ABS Wheel Speed Sensor Rear Ref to ABS 16 Rear ABS Wheel Speed Sens
45. traveling at a constant speed When decelerating km h to MPH to When turning to right Steering angle Steering time When turning to left Steering angle Steering time When moving other electrical parts Parts name Operating condition ABS diag 4 Check List Interview ABS DIAGNOSTICS 2 STATE OF BRAKE WARNING LIGHT Brake warning light Always comes on Sometimes Only once Does not come on When parking brake lever is pulled When parking brake lever is released When how long does it come on Ignition key position LOCK ON before starting engine START On after starting Engine is running On after starting Engine is stop Immediately after ignition is ON Immediately after ignition starts When advancing km h to MPH to 4 While traveling at a constant speed When decelerating km h to MPH to When turning to right Steering angle Steering time When turning to left Steering angle Steering time When operating other electrical parts Parts name Operating condition ABS diag 5 Check List for Interview ABS DIAGNOSTICS 3 SYMPTOMS ABS operating condi Does not operate tion Operates only when abruptly applying brakes Vehicle speed How to step
46. when carrying out the sequence control Go to step 3 Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U gt CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nector between generator bat tery and ABSCM amp H U Repair the con nector Go to step 4 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 5 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 88 Proceed with the diagnosis corre sponding to DTC A temporary poor contact NOTE Although the ABS warning light re mains illuminating at this point this is a normal condition Vehicle must be driven at approx 12 km h 7 46 MPH or faster to turn off ABS warn ing light Make sure that the ABS warning light goes off after driving ve hicle Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AC DTC 52 MOTOR MALFUNCTION DIAGNOSIS Faulty motor Faulty motor relay Faulty harness connector TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM BATTERY SBF HOLDER IGNITIO
47. 0280 0460 0260 0060 0080 0300 ABS control module malfunction ABS control module and hydraulic control unit malfunction lt Ref to ABS diag 69 DTC 41 ABS CONTROL MOD ULE MALFUNCTION Diagnostics Procedure with Diag nostic Trouble Code DTC gt 5A00 Power supply volt age too low Power supply volt age too low lt Ref to ABS diag 71 DTC 42 POWER SUPPLY VOLTAGE TOO LOW Diagnostics Procedure with Diag nostic Trouble Code DTC gt Power supply volt age too high Power supply volt age too high lt Ref to ABS diag 74 DTC 42 POWER SUPPLY VOLTAGE TOO HIGH Diagnostics Procedure with Diagnostic Trouble Code DTC gt ABS AT control Non Controlled ABS AT control Non Controlled lt Ref to ABS diag 77 DTC 44 ABS AT CONTROL NON CONTROLLED Diagnostics Procedure with Diagnostic Trouble Code DTC gt ABS AT control Controlled ABS AT control Con trolled lt Ref to ABS diag 79 DTC 44 ABS AT CONTROL CONTROLLED Diagnostics Procedure with Diagnos tic Trouble Code DTC gt Valve relay malfunc tion Valve relay malfunc tion lt Ref to ABS diag 81 DTC 51 VALVE RELAY MAL FUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Valve relay ON failure Valve relay ON failure lt Ref to ABS diag 83 DTC 51 VALVE RELAY ON FAILURE Diagnostics Procedure with Diagnostic Trou ble Code DTC gt ABS diag 24
48. 1 DTC 26 REAR RIGHT ABNOR MAL ABS WHEEL SPEED SENSOR SIGNAL Diagnos tics Procedure with Diagnostic Trouble Code DTC gt 4 02 Open short circuit in Rear ABS wheel speed sensor LH cir cuit Open or short circuit in Rear ABS wheel speed sensor LH cir cuit Ref to ABS diag 44 DTC 27 OPEN OR SHORT CIR CUIT IN REAR LEFT ABS WHEEL SPEED SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trou ble Code gt 4CC5 4D45 4CE5 4C45 4005 4C85 Rear ABS wheel speed sensor LH abnormal signal Rear ABS wheel speed sensor LH abnormal signal Ref to ABS diag 52 DTC 28 REAR LEFT ABNOR MAL ABS WHEEL SPEED SENSOR SIGNAL Diagnos tics Procedure with Diagnostic Trouble Code DTC gt ABS diag 23 ABS DIAGNOSTICS Sub code No List of Diagnostic Trouble Code DTC Display screen Contents of diagnosis Index No 5080 50 0 Abnormal ABS wheel speed sensor signal on any one of four sensor Abnormal ABS wheel Speed sensor signal on any one of four Ref to ABS diag 58 DTC 29 ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL ON ANY ONE OF FOUR SENSOR Diagnostics Procedure with Diagnostic Trouble Code DTC gt Front inlet valve RH malfunction Front inlet valve RH malfunction Ref to ABS diag 62 DTC 31 FRONT RIGHT INLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Front outlet valve RH malfunction Front
49. 2004 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX CHASSIS SECTION FRONT SUSPENSION REAR SUSPENSION RS WHEEL AND TIRE SYSTEM WT DIFFERENTIALS DI This service manual has been prepared to provide SUBARU service personnel with the necessary information and data for the correct maintenance and repair of SUBARU vehicles This manual includes the procedures for maintenance disassembling reas sembling inspection and adjustment of ABS ABS components and diagnostics for guid ance of experienced mechanics Please peruse and utilize this manual fully to ensure complete repair work for satisfying our customers by keeping their vehicle in optimum condition BRAKE BR When replacement of parts during repair work is needed be sure to use SUBARU genuine parts PARKING BRAKE PB TRANSFER CASE TC DRIVE SHAFT SYSTEM DS ABS DIAGNOSTICS POWER ASSISTED SYSTEM POWER STEERING All information illustration and specifi cations contained in this manual are based on the latest product information available at the time of publication approval FUJI HEAVY INDUSTRIES LTD G1870GE5 ELLA Ae DO A c Rc c d c _ ABS DIAGNOSTICS ABS diag X D h peg Page Basic Diagnostic Procedure 2 Check List for Intef VIBW idco uc 4 General creer et ortae ose eae vta qu cs Dui p
50. 22 17 __ 20 12 13 18 21 22 23 28 31 32 33 38 O1 415 6 7 819 02 13 14 15 e t7 18 19 20 21 22 TOSS ABS00356 ABS diag 64 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Run the engine at idle Is the voltage 10 15 V Go to step 2 Repair the har ness connector between battery ignition switch and ABSCM amp H U 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 4 Chassis ground RHD F49 No 1 Chassis ground CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Measure the resistance between Is the resistance less than 0 5 Q Go to step 3 Repair the ABSCM amp H U ground harness ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con Go to step 4 nectors between generator battery and ABSCM amp H U Is the same DTC as in the cur rent diagnos
51. 3 Rear outlet solenoid valve LH 24 Front ABS wheel speed sensor LH 3 ABS control module and hydraulic 14 Rear inlet solenoid valve RH control unit ABSCM amp H U 15 Rear outlet solenoid valve RH 25 Front ABS wheel speed sensor 4 ABS control module area 16 Transmission control module RH 5 Valve relay TCM AT model 26 Rear ABS wheel speed sensor LH 6 Motor relay 17 Diagnosis connector 27 Rear ABS wheel speed sensor 7 Motor 18 Data link connector RH 8 Front inlet solenoid valve LH 19 Brake warning light 28 Lateral G sensor STi model 9 Front outlet solenoid valve LH 20 ABS warning light 10 Front inlet solenoid valve RH 21 Stop light switch 11 Front outlet solenoid valve RH 22 Stop light ABS diag 14 Control Module Signal ABS DIAGNOSTICS C WAVEFORM V 2 9 10 3 20 Hz 0 12 1V 11 12 7 8 14 15 20 Hz gt 500034 1 ABS wheel speed sensor 2 Terminal No 3 Standard output voltage ABS diag 15 Subaru Select Monitor ABS DIAGNOSTICS 6 Subaru Select Monitor A OPERATION 1 READ DIAGNOSTIC TROUBLE CODE DTC 1 Prepare the Subaru Select Monitor kit ABSO00111 2 Connect the diagnosis cable to Subaru Select Monitor 3 Insert the cartridge into Subaru Select Monitor Ref to ABS diag 9 SPECIAL TOOLS PREPA RATION TOOL General Description ABS00112 4 Connect the Subaru
52. ABS does not operate WIRING DIAGRAM BATTERY SBF HOLDER IGNITION SWITCH 1 LHD 5 RHD 3 2 LHD 6 ri waa RHD 4 3 LHD 00 ABSCM amp H U SOLENOID a FL INLET zu RR INLET RR OUTLE PEL OUTLET FR INLET OUTLE RL INLET IRL OUTLET 1 273 415 6 7 Ie To Troop aps 21314 16 17 18 19 20 21 22 516 7 8 3 4 s 4 e 14 516 5 2425 35136 37 38 s gt 26 29 34 30 31 32 33 27128 29 30181 23 24 25 26 10 7 508 rq 13 18 21 22123 28 ABS00364 ABS diag 87 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK MOTOR RELAY IN ABSCM amp H U 1 Disconnect the connector from ABSCM amp H U 2 Measure the resistance between ABSCM amp H U terminals Terminals No 25 No 26 Is the resistance more than 1 Go to step 2 Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U gt CHECK MOTOR OPERATION Operate the sequence control lt Ref to ABS 10 ABS Sequence Control gt NOTE Use the diagnosis connector to operate se quence control Can motor revolution noise buzz be heard
53. ATION Reproduce the condition under which the problem has occurred as much as possible Drive the vehicle at a speed more than 40 km h 25 MPH for at least 1 minute ABS diag 20 Clear Memory Mode 9 Clear Memory Mode A OPERATION Refer to SUBARU SELECT MONITOR for informa tion about how to clear DTC Ref to ABS diag 16 Subaru Select Monitor ABS diag 21 ABS DIAGNOSTICS ABS Warning Light Brake Warning Light Illumination Pattern ABS DIAGNOSTICS 10 ABS Warning Light Brake Warning Light Illumination Pattern A INSPECTION 1 ON ON OFF IG SW 4 3 3 2 5 3 3 6 7 8 ABS00341 1 START 4 7 Parking brake 2 ABS warning light 5 1 5 sec 8 Release 3 Goes out 6 Brake warning light 1 When the ABS warning light does not illuminate in accordance with this illumination pattern there must be an electrical malfunction 2 When the ABS warning light remains constantly OFF repair the ABS warning light circuit or diagnosis cir cuit lt Ref to ABS diag 26 Diagnostics Procedure without Diagnostic Trouble Code DTC gt NOTE Even though the ABS warning light does not go out 1 5 seconds after it illuminates the ABS system operates normally when the warning light goes out while driving at approx 12 km h 7 MPH However the Anti lock brakes do not work while ABS warning light is illuminated ABS diag 22 List of Diagnostic Trouble Code DTC
54. BS diag 2 Basic Diagnostic Procedure ABS DIAGNOSTICS Step Check Yes No PERFORM THE DIAGNOSIS Are the DTCs indicated on dis Inspect using Complete the 1 For the list refer to List of DTC Ref play diagnostics diagnosis to ABS diag 23 WITH SUBARU SELECT cedure with Sub MONITOR LIST List of Diagnostic Trouble aru Select Code DTC gt Monitor Ref to 2 Repair trouble cause ABS diag 37 3 Perform the clear memory mode lt Ref to Diagnostics Proce ABS diag 17 CLEAR MEMORY MODE dure with Diagnos OPERATION Subaru Select Monitor gt tic Trouble Code 4 Perform the inspection mode lt Ref to DTC gt ABS diag 20 Inspection Mode 5 Calling up the DTC Ref to ABS diag 16 READ DIAGNOSTIC TROUBLE CODE OPERATION Subaru Select Monitor ABS diag 3 Check List Interview ABS DIAGNOSTICS 2 Check List for Interview A CHECK Check the following items about the vehicle s state 1 STATE OF ABS WARNING LIGHT ABS warning light Always comes on Sometimes Only once Does not come on When how long does it come on Ignition key position LOCK ON before starting engine START On after starting Engine is running On after starting Engine is stop Timing Immediately after ignition is ON Immediately after ignition starts When advancing km h to MPH to While
55. C ABS DIAGNOSTICS RHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL EB 4 7 12113 1213741516 3 5161718 27 e zo ao st 26 ABS00369 Step Check No CHECK OUTPUT OF G SENSOR USING 15 the voltage 2 1 2 5 Go to step 2 Go to step 6 SUBARU SELECT MONITOR when G sensor is in horizontal 1 Select Current data display amp Save on the position Subaru Select Monitor 2 Read G sensor output on the Subaru Select Monitor display ABS diag 103 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nector between ABSCM amp H U and G sensor Repair the con nector Go to step 3 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 4 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proce
56. Connector amp terminal LHD B301 No 29 No 28 RHD F49 29 28 Is the resistance 4 3 4 9 Go to step 11 Repair the har ness connector between Lateral G sensor and ABSCM amp H U CHECK BATTERY SHORT OF HARNESS 1 Turn the ignition switch to OFF 2 Remove the console box 3 Disconnect the connector from lateral G sen sor 4 Disconnect the connector from ABSCM amp H U 5 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 29 Chassis ground RHD F49 No 29 Chassis ground Is the voltage less than 1 V ABS diag 116 Go to step 12 Repair the har ness between lat eral G sensor and ABSCM amp H U Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK BATTERY SHORT OF HARNESS 1 Turn the ignition switch to ON 2 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 29 Chassis ground RHD F49 No 29 Chassis ground Is the voltage less than 1 V Go to step 13 Repair the har ness between lat eral G sensor and ABSCM amp H U CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nector between ABSCM amp H U and lateral G sensor Repair the con nector Go to step 14 CHECK ABSCM amp H U 1 Conn
57. DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 4 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK INPUT VOLTAGE OF LATERAL G SENSOR 1 Turn the ignition switch to OFF 2 Remove the console box 3 Remove the lateral G sensor from vehicle Do not disconnect connector 4 Turn the ignition switch to ON 5 Measure the voltage between lateral G sen sor connector terminals Connector amp terminal B257 1 No 3 Is the voltage 4 75 5 25 V Go to step 6 Repair the har ness connector between lateral G sensor and ABSCM amp H U CHECK OPEN CIRCUIT IN LATERAL G SEN SOR OUTPUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 28 No 30 RHD F49 No 28 No 30 Is the resistance 5 0 5 6 kQ Go to step 7 Repair the har ness connector between lateral G sensor and ABSCM amp H U CHECK GROUND SHORT IN LATERAL G SENSOR OUTPUT HARNESS 1 Disconnect the connector from lateral G sen sor 2 Measure the resistance between ABSCM amp H U connect
58. ESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 29 No 28 RHD F49 No 29 No 28 Is the resistance 5 0 5 6 kQ Go to step 6 Repair the har ness connector between lateral G sensor and ABSCM amp H U CHECK GROUND SHORT OF HARNESS Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 28 Chassis ground RHD F49 No 28 Chassis ground Is the resistance more than 1 Go to step 7 Repair the har ness between lat eral G sensor and ABSCM only Replace the ABSCM amp H U Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt CHECK LATERAL G SENSOR 1 Remove the console box 2 Remove the lateral G sensor from vehicle 3 Connect the connector to lateral G sensor 4 Connect the connector to ABSCM amp H U 5 Turn the ignition switch to ON 6 Measure the voltage between lateral G sen sor connector terminals Connector amp terminal B257 No 2 No 3 Is the voltage 2 1 2 5 when lateral G sensor is in hor izontal position Go to step 8 Replace the lateral G sensor Ref to ABS 23 Lateral G Sensor CHECK LATERAL G SENSOR Measure the voltage between lateral G sensor connector term
59. Een ARR 8 Electrical Components 10 Control Module ret EN RUP EE 12 Subaru Select MORILOFE Qv 16 Read Diagnostic Trouble Code 19 INSPECTION 20 Clear Memory ees e oe ere tei ea e SER Fed alea 21 ABS Warning Light Brake Warning Light Illumination Pattern 22 List of Diagnostic Trouble Code DTC 23 Diagnostics Procedure without Diagnostic Trouble Code DTO 26 Diagnostics Procedure with Diagnostic Trouble Code DTC General Diagnostics Basic Diagnostic Procedure ABS DIAGNOSTICS 1 Basic Diagnostic Procedure A PROCEDURE CAUTION Remove foreign matter dust water etc from the ABSCM amp H U connector during removal and instal lation NOTE To check the harness for broken wires or short circuits shake it while holding it or the connector Check list for interview Ref to ABS diag 4 Check List for Interview Step Check Yes No 1 CHECK PRE INSPECTION Is the unit that might influence Go to step 2 Repair or replace 1 Ask the customer when and how trouble the ABS problem normal each unit occurred using interview checklist Ref to ABS diag 4 Check List for Interview 2 Be
60. GNAL NOISE Is the car telephone or wireless transmitter properly installed Go to step 4 Properly install the car telephone or wireless transmit ter CHECK SOURCES OF SIGNAL NOISE Are noise sources such as an antenna installed near the sensor harness Install the noise Sources apart from sensor harness Go to step 5 CHECK SHIELD CIRCUIT 1 Turn the ignition switch to OFF 2 Connect all connectors 3 Measure the resistance between shield con nector and chassis ground Connector amp terminal DTC 22 LHD B303 No 2 Chassis ground RHD F62 No 2 Chassis ground DTC 24 LHD B303 No 1 Chassis ground RHD F62 No 1 Chassis ground NOTE If the DTC is 26 28 Go to YES Is the resistance less than 0 5 Q Go to step 6 Repair the shield harness CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 7 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary noise interference CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR Are the ABS wheel speed sen sor installation bolts tightened 33 N m 3 3 kgf m 24 ft lb
61. LDER ABS00347 ABS diag 41 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL BATTERY IGNITION SWITCH No 13 RELAY HOLDER COMBINATION METER ABS RELAY GROUND TERMINAL S Alp 2 4 A STR 1 2 s 4 s 6 7 8 9 1112 n3 14 15 17 18 19 20 21 22 22123 24 25 26 27 28 29 30 31 32 p B82 1 213 5 7 DX 8 15 t6 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Tol 3 415 6 1 T2 s 4 e baishe 19 24 25 26 29 34 35 36 0 so 7 18 21 22 23 28 31132133 38 7118 ABS00348 Yes No CHECK WIRING HARNESS Does the ABS warning light Go to step 2 Repair the front 1 Turn the ignition switch to OFF turn on wiring harness 2 Disconnect the connector i2 from connec tor B37 3 Turn the ignition switch to ON ABS diag 42 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK PROJECTION AT ABSCM amp H U 1 Turn the i
62. LHD B301 6 Chassis ground RHD F49 No 6 Chassis ground Is the voltage less than 1 V Go to step 13 Repair the har ness between G sensor and ABSCM amp H U CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nector between ABSCM amp H U and G sensor Repair the con nector Go to step 14 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 15 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK INPUT VOLTAGE OF G SENSOR 1 Turn the ignition switch to OFF 2 Remove the console box 3 Remove the G sensor from vehicle Do not disconnect connector 4 Turn the ignition switch to ON 5 Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 1 No 3 Is the voltage 4 75 5 25 V Go to step 17 Repair the har ness connector between G sensor and ABSCM amp H U CHECK OPEN CIRCUIT IN G SENSOR OUT PUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resist
63. LHD B99 No 5 No 4 RHD B99 No 21 No 20 Is an oscilloscope pattern smooth as shown in the fig ure Go to step 15 Go to step 12 CHECK CONTAMINATION OF ABS WHEEL SPEED SENSOR OR TONE WHEEL Remove the disc rotor or drum from hub in accordance with DTC Is the ABS wheel speed sen sor piece or tone wheel con taminated by dirt or other foreign matter Thoroughly remove dirt or other foreign mat ter Go to step 13 CHECK DAMAGE OF ABS WHEEL SPEED SENSOR OR TONE WHEEL Are there broken or damaged in the ABS wheel speed sen sor piece or tone wheel Go to step 14 Replace the ABS wheel speed sen sor or tone wheel Front lt Ref to ABS 13 Front ABS Wheel Speed Sensor gt Rear lt Ref to ABS 16 Rear ABS Wheel Speed Sensor gt and Front lt Ref to ABS 19 Front Tone Wheel gt Rear lt Ref to ABS 20 Rear Tone Wheel gt CHECK TONE WHEEL RUNOUT Measure the tone wheel runout Is the runout less than 0 05 mm 0 0020 in ABS diag 55 Go to step 15 Replace the tone wheel Front lt Ref to ABS 19 Front Tone Wheel gt Rear lt Ref to ABS 20 Rear Tone Wheel gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK RESISTANCE OF ABS WHEEL SPEED SENSOR 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABS wheel speed sensor 3 Measure
64. LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167 19 20 21 22 27 28 29 30 31 23 26 Nj mp ABS00368 ABS diag 106 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL 00 Step ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL 12 13 11213141515 27128 29 30 31 26 ABS00369 Check No CHECK ALL FOUR WHEELS FOR FREE Have the wheels been turned The ABS is nor to step 2 TURNING freely such as when vehicle is mal Erase the lifted up or operated on a roll DTC ing road ABS diag 107 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK OUTPUT OF G SENSOR USING SUBARU SELECT MONITOR 1 Select Current data display amp Save
65. MUNICATION OF SUBARU SE LECT MONITOR 1 Turn the ignition switch to OFF 2 Disconnect the ABSCM amp H U connector the ignition switch to ON 4 Check whether communication to other sys tems can be executed normally Are the name and year of sys tem displayed on Subaru Select Monitor Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Go to step 6 CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL MODULE AND DATA LINK CONNECTOR 1 Turn the ignition switch to OFF 2 Disconnect the ABSCM amp H U ECM and connectors 3 Measure the resistance between data link connector and chassis ground Connector amp terminal B40 No 5 Chassis ground B40 No 4 Chassis ground Is the resistance more than 1 Go to step 7 Repair the har ness and connec tor between each control module and data link con nector CHECK OUTPUT SIGNAL FOR ABSCM amp H U 1 Turn the ignition switch to ON 2 Measure the voltage between ABSCM amp H U and chassis ground Connector amp terminal B40 5 Chassis ground B40 4 Chassis ground Is the voltage less than 1 V Go to step 8 Repair the har ness and connec tor between each control module and data link con nector CHECK HARNESS CONNECTOR BETWEEN ABSCM amp H U AND DATA LINK CONNEC TOR Measure the resistance between ABSCM amp H U connector a
66. N 3 Measure the voltage between TCM connec tor terminal and chassis ground Connector amp terminal B55 No 21 Chassis ground Is the voltage 10 15 V Go to step 5 Go to step 4 CHECK AT Is the AT functioning normally Replace the TCM Repair the AT CHECK OPEN CIRCUIT OF HARNESS Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 3 Chassis ground B301 No 31 Chassis ground RHD F49 No 3 Chassis ground F49 No 31 Chassis ground Is the voltage 10 15 V Go to step 6 Repair the har ness connector between TCM and ABSCM amp H U CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between TCM and ABSCM amp H U Repair the con nector Go to step 7 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Go to step 8 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 78 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS
67. N SWITCH 1 LHD 5 RHD 3 2 LHD 6 ri waa RHD 4 3 LHD 00 ABSCM amp H U SOLENOID a FL INLET zu RR INLET RR OUTLE PEL OUTLET FR INLET OUTLE RL INLET IRL OUTLET 1 273 415 6 7 Ie To Troop aps 21314 16 17 18 19 20 21 22 516 7 8 3 4 s 4 e 14 516 5 2425 35136 37 38 s gt 26 29 34 30 31 32 33 27128 29 30181 23 24 25 26 10 7 508 rq 13 18 21 22123 28 ABS00364 ABS diag 89 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Turn the ignition switch to ON 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 25 Chassis ground RHD F49 No 25 Chassis ground Is the voltage 10 15 V Go to step 2 Repair the har ness connector between battery and ABSCM amp H U and check fuse SBF8 CHECK GROUND CIRCUIT OF MOTOR 1 Turn the ignition switch to OFF 2 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp
68. NG BRAKE SWITCH 1 2 3 4 5 6 7 8 112 3 4 5 6 7 8 10 11 12 13 14 2 1213141516 7819 10 10 11 12 13 14 15 16 17 18 1516 17 18 19 20 21221 23124 25 26 27 28 29 30 i 2 3 4 5 6 7 8 9 10 11 12 13114 15 16 17 18 19 20 21 22123 24 25126 27 28129 30 31132 1 2 3 415 6 7 8 9 10 11 12 13 1415 16717 119120121122 112 3 415 6 7 8 9 10 11 12 1314 15 16 17 18 119120 27 28 29 30 31 23 24 25 26 21 22 23 24 25 26 27128129 30131 32 33134 35136137 38 39 40 ABS00478 Step Check Yes No CHECK BRAKE FLUID AMOUNT Is the brake fluid amount Go to step 2 Fill the brake fluid to specified amount Check the amount of brake fluid in reservoir between MAX line and MIN tank of master cylinder line ABS diag 35 Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK BRAKE FLUID LEVEL SWITCH 1 Disconnect the level switch connector B16 from master cylinder 2 Measure the resistance of ma
69. NOT COME ON DIAGNOSIS ABS warning light circuit is open or shorted TROUBLE SYMPTOM When the ignition switch is turned to ON engine OFF ABS warning light does not come on WIRING DIAGRAM LHD MODEL BATTERY SBF 3 SBF 1 OND o 1 a I 5 IGNITION 2 SWITCH RELAY HOLDER lt gt No 13 8108 TURBO ENGINE MODEL 6 NON TURBO ENGINE MODEL GROUND TERMINAL 1 2 3 4 5 8 e pompes HS 4 s e 7 8 9 TEH 16 17 18 19 20 21 22 151617 18 19 20 21 22 23 24 25 26 27 28 2930 n 27128129 30 31 9 19 24 25126 29 34 35 36 Era 09 qn 11 12 13 18 21 22 23 28 31132133 38 AIE L3 RELAY HOLDER 13141516 ABS00347 ABS diag 26 Diagnostics Procedure without Diagnostic Trouble Code ABS DIAGNOSTICS RHD MODEL BATTERY IGNITION SWITCH No 13 COMBINATION METER ABS RELAY GROUND TERMINAL 00 ERA Alp 2 4
70. O GENERATOR ALO 1 a o jane 7a RELAY EE 1 LHD 5 HOLDER 2 AHDS 2 LHD 6 RHD 4 ABS O72 3 LHD RELAY 0007 4 f QE 14115116 19 29 34 35 36 10 27 1 2 112131415 314 6 7 8 9 10 19 20 21 22 17 __ 20 12 13 18 21 22 23 28 31 32 33 38 O1 415 6 7 819 02 13 14 15 e t7 18 19 20 21 22 TOSS ABS00356 ABS diag 75 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK GENERATOR 1 Start the engine 2 Idle after warm up 3 Measure the voltage between generator B terminal and chassis ground Terminals Generator B terminal Chassis ground Is the voltage 10 17 V Go to step 2 Repair the genera tor Ref to SC H4SO 13 Generator CHECK BATTERY TERMINAL Turn the ignition switch to OFF Are the positive and negative battery terminals tightly clamped Go to step 3 Tighten the clamp of terminal CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Disconnect the connector from ABSCM amp H U 2 Run the engine at idle 3 Operate the electric load applyi
71. O OFF DIAGNOSIS ABS warning light circuit is open or shorted TROUBLE SYMPTOM When starting the engine and while ABS warning light is kept ON WIRING DIAGRAM BATTERY SBF 3 SBF 1 OND OND Q i a E IGNITION eo SWITCH O RELAY HOLDER Slew No 13 lt TURBO ENGINE MODEL H NON TURBO ENGINE ABS RELAY MODEL Q GROUND TERMINAL B82 n 112 1 2 3 4 5 6 7 8 9 0 1121314 7 8 9 F 12 13 14 15 16 17 18 19 20 21 22 23 24 1213185 617 819 1011 12 13 14 15 16 17 18 19 2021 22 23 meeste ele honela 2 3114 9 Msie 19 24 25 26 29 34 35 36 519 1 11 12 13 18 21 22 23 28 31 32 33 38 7118 RELAY HOLDER ABS00347 ABS diag 30 Diagnostics Procedure without Diagnostic Trouble Code ABS DIAGNOSTICS RHD MODEL BATTERY IGNITION SWITCH No 13 COMBINATION METER ABS RELAY GROUND TERMINAL ABSCM amp H U ne TSTAT
72. RAM LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167 19 20 21 22 27 28 29 30 31 23 26 Nj mp ABS00368 ABS diag 97 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL EB 4 7 12113 1213741516 3 5161718 27 e zo ao st 26 ABS00369 Step Check No CHECK OUTPUT OF G SENSOR USING 15 the voltage 2 1 2 5 Go to step 2 Go to step 5 SUBARU SELECT MONITOR when G sensor is in horizontal 1 Select Current data display amp Save on the position Subaru Select Monitor 2 Read the G sensor output in Subaru Select Monitor data display ABS diag 98 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check
73. SEQUENCE CONTROL select the Brake System and press YES key 3 Press the YES key after the information of en Display gine type is displayed screen x AM de DOT RUNE 4 On the Brake Control Diagnosis display ABS Perform ABS sequence Ref to ABS screen select the Clear Memory and press control by operating valve 10 ABS sequence YES key and pump motor sequen Sequence Con control tially trol gt Display screen Contents to be monitored Clear memory Function of clearing DTC 5 When the Done and turn ignition switch to OFF are shown on display screen turn the Subaru Select Monitor and ignition switch to OFF ABS diag 17 Subaru Select Monitor ABS DIAGNOSTICS 5 FREEZE FRAME DATA NOTE Data stored at the time of trouble occurrence is shown on display Each time trouble occurs the latest information is stored in the freeze frame data in memory Freeze frame data will be memorized maximum to three f freeze frame data is not properly stored in memory due to a drop in ABSCM power supply etc a DTC preceded by a question mark ap pears on the Subaru Select Monitor display This shows it may be an unreliable reading Display screen Contents to be monitored FR wheel speed Wheel speed detected by Front ABS wheel speed sensor RH is displayed in km h or mile h FL wheel speed Wheel speed detected by Fr
74. STS T7 T8 T9 0 112 3 4 1516 718 9 1 2 3 4 5 6 7 8 9 ald 2 1 14 15 16 17 18 19 20 21 22 22123 24 25 26 27 28 129 30 131132 Cito 1 2 3 4 5 6 7 1516 17 18 19 20 21 22 23 24 25 2627 28 2930 1 31415 6 1 T2 s 4 e 5 19 24 25 26 29 34 35 36 spre ol 17 ja 2 0 3 18 21 22 23 28 31132133 38 7 8 ABS00348 Yes No CHECK INSTALLATION OF ABSCM amp H U Is the ABSCM amp H U connector Go to step 2 Insert the CONNECTOR inserted into ABSCM until the ABSCM amp H U con Turn the ignition switch to OFF clamp locks onto it nector into ABSCM amp H U until the clamp locks onto it ABS diag 31 Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK GROUND TERMINAL Measure the resistance between Ground ter minals B81 and chassis ground Terminals Ground terminal A Chassis ground Ground terminal B Chassis ground Is the resistance less than 0 5 Q Go to step 3 Repair the open circuit in Ground terminal harness CHECK DIAGNOSIS LINE 1 Connect the Ground terminal B81 to diag nosis connector B82 No 6 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp termin
75. Select Monitor to data link connector 1 Data link connector located in the lower por tion of instrument panel on the driver s side V IS ABS00346 1 Data link connector 2 Connect the diagnosis cable to data link connector CAUTION Do not connect the scan tools except for Suba ru Select Monitor and general scan tool 5 Turn the ignition switch to ON engine OFF and Subaru Select Monitor switch to ON ABSO00114 1 Power switch 6 On the Main Menu display screen select the Each System Check and press YES key 7 On the System Selection Menu display screen select the Brake Control System and press YES key 8 Press the YES key after the information of ABS type is displayed 9 On the ABS Diagnosis display screen select the DTC Display and press YES key 10 On the DTC Display display screen select the Current DTC or History DTC and press YES key NOTE For detailed operation procedure refer to the SUBARU SELECT MONITOR OPERATION MAN UAL For detailed concerning the DTC refer to the LIST OF DTC lt Ref to ABS diag 23 List of Diag nostic Trouble Code DTC gt maximum of 3 DTCs are displayed in order of occurrence particular DTC is not properly stored in mem ory due to a drop in ABSCM amp H U power supply etc when a problem occurs the DTC followed by a question mark ap
76. Trouble Code DTC ABS DIAGNOSTICS W DTC 44 ABS AT CONTROL NON CONTROLLED DIAGNOSIS Combination of AT control faults TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM Co ABSCM amp H U 1 LHD 1 121314151 7 6 7 9 1 Teieti s TT as s 23 24 25 26 ABS00360 Yes CHECK SPECIFICATIONS OF THE AB Does the vehicle specification Go to step 2 Replace the SCM amp H U and ABSCM amp H U specifica ABSCM amp H U Check specifications of mark on ABSCM amp H U tion match Ref to ABS 6 CK FWD AT ABS Control Mod CL FWD MT ule and Hydraulic CU AWD AT Control Unit CV AWD MT ABSCM amp H U CX AWD MT STi model CY AWD MT STi with Driver s control center differential model ABS diag 77 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK GROUND SHORT OF HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the two connectors from TCM 3 Disconnect the connector from ABSCM amp H U 4 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 3 Chassis ground RHD F49 No 3 Chassis ground Is the resistance more than 1 MQ Go to step 3 Repair the har ness between TCM and ABSCM amp H U CHECK TCM 1 Connect all connectors to TCM 2 Turn the ignition switch to O
77. UIT Diagnostics Procedure with Diagnostic Trou ble Code DTC gt 4865 4945 4825 4845 4905 4885 Front ABS wheel speed sensor RH abnormal signal Front ABS wheel speed sensor RH abnormal signal Ref to ABS diag 51 DTC 22 FRONT RIGHT ABNOR MAL ABS WHEEL SPEED SENSOR SIGNAL Diagnos tics Procedure with Diagnostic Trouble Code DTC gt 4202 Open or short circuit in Front ABS wheel speed sensor LH cir cuit Open or short circuit in Front ABS wheel speed sensor LH cir cuit Ref to ABS diag 43 DTC 23 OPEN OR SHORT CIR CUIT IN FRONT LEFT ABS WHEEL SPEED SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trou ble Code gt 40C5 4145 40E5 4045 4105 4085 Front ABS wheel speed sensor LH abnormal signal Front ABS wheel speed sensor LH abnormal signal Ref to ABS diag 51 DTC 24 FRONT LEFT ABNOR MAL ABS WHEEL SPEED SENSOR SIGNAL Diagnos tics Procedure with Diagnostic Trouble Code DTC gt 4602 Open or short circuit in Rear ABS wheel speed sensor RH cir cuit Open or short circuit in Rear ABS wheel speed sensor RH cir cuit Ref to ABS diag 43 DTC 25 OPEN OR SHORT CIR CUIT IN REAR RIGHT ABS WHEEL SPEED SENSOR CIRCUIT Diagnostics Procedure with Diagnostic Trou ble Code gt 44C5 4545 44E5 4445 4505 4485 Rear ABS wheel speed sensor RH abnormal signal Rear ABS wheel speed sensor RH abnormal signal Ref to ABS diag 5
78. agnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK VALVE RELAY IN ABSCM amp H U 1 Disconnect the connector from ABSCM amp H U 2 Measure the resistance between ABSCM amp H U terminals Terminals No 23 No 24 Is the resistance more than 1 Go to step 2 Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U gt CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between generator battery and ABSCM amp H U Repair the con nector Go to step 3 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 4 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 84 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AA DTC 52 OPEN CIRCUIT IN MOTOR RELAY CIRCUIT DIAGNOSIS Faulty motor Faulty motor relay Faulty harness connector TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM BATTERY SBF HOLDER IGNITION SWITCH 1 LHD 5 RHD 3 2 LHD 6 r
79. al LHD B301 No 4 Chassis ground RHD F49 No 4 Chassis ground Is the resistance less than 0 5 Q Go to step 4 Repair the open circuit in harness connector between ABSCM amp H U and diagnosis connec tor CHECK GENERATOR 1 Start the engine 2 ldle the engine 3 Measure the voltage between generator and chassis ground Terminals Generator B terminal Chassis ground Is the voltage 10 15 V Go to step 5 Repair the genera tor Ref to SC H4SO 13 Generator CHECK BATTERY TERMINAL Turn the ignition switch to OFF Is there poor contact at battery terminal Repair or tighten the battery termi nal Go to step 6 CHECK POWER SUPPLY OF ABSCM 1 Start the engine 2 Idle the engine 3 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 4 Chassis ground RHD F49 No 1 Chassis ground Is the voltage 10 15 V Go to step 7 Repair the ABSCM amp H U power supply cir cuit CHECK WIRING HARNESS 1 Disconnect the connector i2 from connec tor B37 2 Turn the ignition switch to ON Does the ABS warning light turn on Repair the front or body wiring har ness Go to step 8 CHECK PROJECTION AT ABSCM amp H U 1 Turn the ignition switch to OFF 2 Check for damage at the ABSCM amp H U ter minal NOTE For detail of connector switch refer
80. an 1 5 V when the stop light is OFF and 10 15 V when the stop light is ON ABS warning light 2 Less than 1 5 V within 1 5 seconds immediately after ignition switch has been turned to ON and 10 15 V after 1 5 sec onds has elapsed Brake warning light 2 EBD warning light Less than 1 5 V within 1 5 seconds immediately after ignition switch has been turned to ON and 10 15 V after 1 5 sec onds has elapsed AT ABS signal AT models only Less than 1 5 V when the ABS control still operates and more than 5 5 V when ABS does not operate ABS operation signal monitor Less than 1 5 V when the ABS control still operates and more than 5 5 V when ABS does not operate Subaru Select Moni Data is received Less than 1 5 V when no data is received tor 2 Data is sent 4 75 5 25 V when no data is sent ABS diagnosis connec Terminal No 3 10 15 V when ignition switch is ON tor Terminal No 6 10 15 V when ignition switch is ON Power supply 1 10 15 V when ignition switch is ON Grounding line Grounding line 1 Measure the I O signal voltage after removing the connector from the ABSCM amp H U terminal 2 Measure the I O signal voltage at connector F2 ABS diag 13 Control Module Signal ABS DIAGNOSTICS B WIRING DIAGRAM ABS00375 1 Battery 12 Rear inlet solenoid valve LH 23 G sensor 2 IGN 1
81. ance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 6 No 28 RHD F49 No 6 No 28 Is the resistance 5 0 5 6 kQ Go to step 18 Repair the har ness connector between G sensor and ABSCM amp H U CHECK G SENSOR 1 Connect the connector to G sensor 2 Connect the connector to ABSCM amp H U 3 Turn the ignition switch to ON 4 Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 No 3 Is the voltage 2 1 2 5 V when G sensor is in horizontal position Go to step 19 Replace the G sensor Hef to ABS 21 G Sen sor gt CHECK G SENSOR Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 No 3 Is the voltage 3 7 4 1 V when G sensor is inclined for wards to 90 ABS diag 100 Go to step 20 Replace the G sensor lt Ref to ABS 21 G Sen sor gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK G SENSOR Measure the voltage between G sensor con nector terminals Connector amp terminal B292 2 3 Is the voltage 0 5 0 9 V when G sensor is inclined backwards to 90 Go to step 21 Replace the G sensor to ABS 21 G Sen sor gt CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch
82. arness and con nectors are colored yellow Do not use electri cal test equipment on these circuit Be careful not to damage the airbag system wiring harness when servicing the ABS wheel speed sensor ABS control module and hydrau lic control unit B INSPECTION Before performing diagnostics check the following items which might affect ABS problems 1 BATTERY Measure the battery voltage and specific gravity of electrolyte Standard voltage 12 V or more Specific gravity Above 1 260 2 BRAKE FLUID 1 Check the brake fluid level 2 Check the brake fluid leakage 3 HYDRAULIC UNIT Check the hydraulic unit e With brake tester Ref to ABS 8 CHECKING THE HYDRAULIC UNIT ABS OPERATION WITH BRAKE TESTER INSPECTION ABS Control Module and Hydraulic Control Unit ABSCM amp H U gt Without brake tester lt Ref to ABS 7 CHECK ING THE HYDRAULIC UNIT ABS OPERATION BY PRESSURE GAUGE INSPECTION ABS Control Module and Hydraulic Control Unit AB SCM amp H U gt 4 BRAKE DRAG Check for brake drag 5 BRAKE PAD AND ROTOR Check the brake pad and rotor Front Ref to BR 27 INSPECTION Front Brake Pad and to BR 29 INSPECTION Front Disc Rotor Rear Ref to BR 38 INSPECTION Rear Brake Pad and Ref to BR 40 INSPECTION Rear Disc Rotor or Ref to BR 48 INSPECTION Rear Drum Brake Shoe and Ref to BR 49 IN SPECTION Rear Drum Brake Drum 6 TIRE Check th
83. between battery ignition switch and ABSCM amp H U CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 3 Repair the ABSCM amp H U ground harness CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between generator battery and ABSCM amp H U Repair the con nector Go to step 4 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM amp H U Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Go to step 5 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 68 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS T DTC 41 ABS CONTROL MODULE MALFUNCTION DIAGNOSIS Faulty ABSCM amp H U TROUBLE SYMPTOM ABS does not operate EBD does not operate NOTE In addition to the ABS warning light brake warning light illuminates WIRING DIAGRAM ABSCM amp H U LHD MODEL RHD MODEL
84. d sensor Brake caliper amp piston pads Wheel alignment Tire specifications tire wear and air pressures Incorrect wiring or piping connections Road surface uneven camber Vehicle spins ABSCM amp H U solenoid valve ABS wheel speed sensor Brake pads Tire specifications tire wear and air pressures Incorrect wiring or piping connections Poor braking Long braking stopping distance ABSCM8 amp H U solenoid valve Brake pads Air in brake line Tire specifications tire wear and air pressures Incorrect wiring or piping connections Wheel locks ABSCM amp H U solenoid valve motor ABS wheel speed sensor Incorrect wiring or piping connections Brake dragging ABSCM amp H U solenoid valve ABS wheel speed sensor Master cylinder Brake caliper amp piston Parking brake Axle amp wheels Brake pedal play Long brake pedal stroke Air in brake line Brake pedal play Vehicle pitching Suspension play or fatigue reduced damping Incorrect wiring or piping connections Road surface uneven Unstable or uneven braking ABSCM amp H U solenoid valve ABS wheel speed sensor Brake caliper amp piston pads Tire specifications tire wear and air pressures Incorrect wiring or piping connections Road surface uneven Vibration and or noise while driving on slippery roads Excessive pedal vibration Incorrect wiring or piping connections Road surface uneve
85. de DTC ABS DIAGNOSTICS Step Check Yes No CHECK OUTPUT OF LATERAL G SENSOR USING SUBARU SELECT MONITOR 1 Select Current data display amp Save on the Subaru Select Monitor 2 Read the Subaru Select Monitor display Is the lateral G sensor output on monitor display 2 3 2 7 V when the vehicle is in horizon tal position Go to step 3 Go to step 8 CHECK OUTPUT OF LATERAL G SENSOR USING SUBARU SELECT MONITOR 1 Turn the ignition switch to OFF 2 Remove the console box 3 Remove the lateral G sensor from vehicle Do not disconnect the connector 4 the ignition switch to ON 5 Select Current data display amp Save on the Subaru Select Monitor 6 Read the Subaru Select Monitor display Is the voltage 3 7 4 1 V when lateral G sensor is inclined right to 90 Go to step 4 Replace the lateral G sensor Ref to ABS 23 Lateral G Sensor CHECK OUTPUT OF LATERAL G SENSOR USING SUBARU SELECT MONITOR Read the Subaru Select Monitor display Is the voltage 0 5 0 9 V when lateral G sensor is inclined left to 902 Go to step 5 Replace the lateral G sensor Ref to ABS 23 Lateral G Sensor CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nector between ABSCM amp H U and lateral G sensor Repair the con nector Go to step 6 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the m
86. de DTC ABS DIAGNOSTICS Step Check Yes No CHECK G SENSOR Is the voltage 0 5 0 9 V Go to step 12 Replace the G Measure the voltage between G sensor con when G sensor is inclined sensor Ref to nector terminals backwards to 902 ABS 21 G Sen Connector amp terminal Sor B292 No 2 3 CHECK ABSCM amp H U Is the same DTC as in current Replace the Go to step 13 1 Turn the ignition switch to OFF diagnosis still being output ABSCM only 2 Connect all connectors Ref to ABS 6 3 Erase the memory ABS Control Mod 4 Perform the inspection mode ule and Hydraulic 5 Read out the DTC Control Unit ABSCM amp H U CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the A temporary poor diagnosis corre contact sponding to DTC ABS diag 109 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Al DTC 73 OPEN OR SHORT CIRCUIT IN LATERAL G SENSOR CIRCUIT DIAGNOSIS Faulty Lateral G sensor output voltage TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167
87. dition to the ABS warning light brake warning light illuminates ABS diag 66 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS WIRING DIAGRAM BATTERY C WP 5 1 ALO GENERATOR ALO 1 a o jane 7a RELAY EE 1 LHD 5 HOLDER 2 AHDS 2 LHD 6 RHD 4 ABS O72 3 LHD RELAY 0007 4 f QE 14115116 19 29 34 35 36 10 27 1 2 112131415 314 6 7 8 9 10 19 20 21 22 17 __ 20 12 13 18 21 22 23 28 31 32 33 38 O1 415 6 7 819 02 13 14 15 e t7 18 19 20 21 22 TOSS ABS00356 ABS diag 67 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Run the engine at idle 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 4 Chassis ground RHD F49 No 1 Chassis ground Is the voltage 10 15 V Go to step 2 Repair the har ness connector
88. dule I O Signal A ELECTRICAL SPECIFICATION E ABS00182 1 ABS control module and hydraulic 2 Connector switch control unit ABSCM amp H U con nector NOTE The terminal numbers in ABS control module and hydraulic control unit connector are as shown in the fig ure When the connector is removed from ABSCM amp H U the connector switch closes the circuit between ter minal No 22 and No 23 The ABS warning light illuminates ABS diag 12 Contents Control Module Signal Terminal No ABS DIAGNOSTICS Input Output signal Measured value and measuring conditions Front left wheel ABS wheel speed sen Front right wheel Sor 2 9 Wheel speed sensor Rear left wheel Rear right wheel 0 12 1V When it is 20 Hz Valve relay power supply 1 10 15V Motor relay power supply 1 10 15V 4 75 5 25 G 2 Ground Output 2 1 2 5 V when vehicle is in horizontal position Power supply 4 75 5 25 V Lateral G sensor STi model Ground Output 2 3 2 7 V when vehicle is in horizontal position Stop light switch 1 Less th
89. e tire specifications tire wear and air pres sure Ref to WT 2 SPECIFICATIONS General Description ABS diag 8 General Description ABS DIAGNOSTICS C PREPARATION TOOL 1 SPECIAL TOOLS ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 24082AA230 CARTRIDGE Troubleshooting for electrical systems ST24082AA230 22771AA030 SUBARU SELECT Troubleshooting for electrical systems MONITOR KIT ST22771AA030 2 GENERAL PURPOSE TOOLS TOOL NAME REMARKS Circuit tester Used for measuring resistance voltage and amperage Oscilloscope Used for measuring sensor ABS diag 9 Electrical Components Location ABS DIAGNOSTICS 4 Electrical Components Location A LOCATION ABS00329 1 ABS control module and hydraulic 6 Transmission control module 12 Master cylinder control unit ABSCM amp H U TCM AT model 13 Brake amp EBD warning light 2 Connector 7 Tone wheel 14 Lateral G sensor STi model 3 Diagnosis connector 8 ABS wheel speed sensor 4 ABS warning light 9 Wheel cylinder 5 Data link connector for Subaru 10 G sensor Select Monitor 11 Stop light switch ABS diag 10 Electrical Components Location ABS DIAGNOSTICS y ABS00344 500104 ABS00345 ABS diag 11 Control Module Signal ABS DIAGNOSTICS 5 Control Mo
90. e voltage 3 7 4 1 when G sensor is inclined for wards to 90 Go to step 10 Replace the G sensor lt Ref to ABS 21 G Sen sor gt CHECK G SENSOR Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 3 15 the voltage 0 5 0 9 when sensor is inclined backwards to 90 ABS diag 95 Go to step 11 Replace the G sensor lt Ref to ABS 21 G Sen sor gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK POOR CONTACT IN CONNECTORS 15 there poor contact in con Repair the con Go to step 12 Turn the ignition switch to OFF nector between ABSCM amp H U nector and G sensor CHECK ABSCM amp H U Is the same DTC as in current Replace the Go to step 13 1 Connect all connectors diagnosis still being output ABSCM only 2 Erase the memory Ref to ABS 6 3 Perform the inspection mode ABS Control Mod 4 Read out the DTC ule and Hydraulic Control Unit ABSCM amp H U CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the A temporary poor diagnosis corre contact sponding to DTC ABS diag 96 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AF DTC 56 BATTERY SHORT IN G SENSOR CIRCUIT DIAGNOSIS Faulty G sensor output voltage TROUBLE SYMPTOM ABS does not operate WIRING DIAG
91. ect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Go to step 15 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK INPUT VOLTAGE OF LATERAL G SENSOR 1 Turn the ignition switch to OFF 2 Remove the console box 3 Remove the lateral G sensor from vehicle Do not disconnect connector 4 Turn the ignition switch to ON 5 Measure the voltage between lateral G sen sor connector terminals Connector amp terminal B257 1 No 3 Is the voltage 4 75 5 25 V Go to step 17 Repair the har ness connector between Lateral G sensor and ABSCM amp H U CHECK OPEN CIRCUIT IN LATERAL G SEN SOR OUTPUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 29 No 28 RHD F49 No 29 No 28 Is the resistance 5 0 5 6 kQ Go to step 18 Repair the har ness connector between lateral G sensor and ABSCM amp H U CHECK LATERAL G SENSOR 1 Connect the connector to lateral G sensor 2 Connect the c
92. ector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 5 Repair the ABSCM amp H U ground harness CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between generator battery and ABSCM amp H U Repair the con nector Go to step 6 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit gt Go to step 7 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 73 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS V DTC 42 POWER SUPPLY VOLTAGE TOO HIGH DIAGNOSIS Power source voltage of the ABSCM amp H U is high TROUBLE SYMPTOM ABS does not operate EBD may not operate NOTE In addition to the ABS warning light brake warning light illuminates temporarily when the EBD does not op erate Both warning lights go off on the recovery of voltage ABS diag 74 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS WIRING DIAGRAM BATTERY C WP 5 1 AL
93. ed with the diagnosis corre sponding to DTC A temporary poor contact CHECK OPEN CIRCUIT IN G SENSOR OUT PUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 6 No 28 RHD F49 No 6 No 28 Is the resistance 5 0 5 6 kQ Go to step 6 Repair the har ness connector between G sensor and ABSCM amp H U CHECK GROUND SHORT OF HARNESS Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 28 Chassis ground RHD F49 No 28 Chassis ground Is the resistance more than 1 MQ Go to step 7 Repair the har ness between G sensor and ABSCM only Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U gt CHECK G SENSOR 1 Remove the console box 2 Remove the G sensor from vehicle 3 Connect the connector to G sensor 4 Connect the connector to ABSCM amp H U 5 the ignition switch to ON 6 Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 Is the voltage 2 1 2 5 V when G sensor is in horizontal position Go to step 8 Replace the G sensor lt Ref to ABS 21 G Sen sor gt CHECK G SENSOR Measure
94. emory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 7 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK OPEN CIRCUIT IN LATERAL G SEN SOR OUTPUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal LHD B301 No 29 No 28 RHD F49 No 29 No 28 Is the resistance 5 0 5 6 kQ Go to step 9 Repair the har ness connector between lateral G sensor and ABSCM amp H U CHECK LATERAL G SENSOR 1 Remove the console box 2 Remove the lateral G sensor from vehicle 3 Connect the connector to lateral G sensor 4 Connect the connector to ABSCM amp H U 5 Turn the ignition switch to ON 6 Measure the voltage between lateral G sen sor connector terminals Connector amp terminal B257 2 No 3 Is the voltage 2 1 2 5 V when lateral G sensor is in hor izontal position Go to step 10 Replace the lateral G sensor Ref to ABS 23 Lateral G Sensor CHECK LATERAL G SENSOR Measure the voltage between lateral G sensor
95. fore performing diagnosis inspect the unit which might influence the ABS problem Ref to ABS diag 8 INSPECTION General Description 2 CHECK INDICATION OF DTC DISPLAY Is the DTC displayed Go to step 4 Go to step 3 1 Turn the ignition switch to OFF 2 Connect the SUBARU SELECT MONITOR to data link connector 3 Turn the ignition switch to ON and SUBARU SELECT MONITOR to ON NOTE If the communication function of Subaru Select Monitor cannot be executed normally check communication circuit Ref to ABS diag 37 COMMUNICATION FOR INITIALIZING POSSIBLE Diagnostics Procedure with Diag nostic Trouble Code DTC gt 4 Read the DTC Ref to ABS diag 17 READ CURRENT DATA OPERATION Sub aru Select Monitor 5 Record all DTCs and freeze frame data 3 PERFORM THE GENERAL DIAGNOSTICS 15 the ABS warning light turned Complete the Inspect using 1 Inspect using General Diagnostics Table off after ignition switch OFF diagnosis diagnostics pro Ref to ABS diag 127 General Diagnostics cedure for No Table Ref to 2 Perform the clear memory mode lt Ref to ABS diag 40 NO ABS diag 17 CLEAR MEMORY MODE DTC gt OPERATION Subaru Select Monitor gt 3 Perform the inspection mode lt Ref to ABS diag 20 Inspection Mode gt 4 Calling up the DTC lt Ref to ABS diag 16 READ DIAGNOSTIC TROUBLE CODE DTC OPERATION Subaru Select Monitor gt Check DTC is not displayed A
96. gnition switch to OFF 2 Disconnect the connector from ABSCM amp H U NOTE For detail of connector switch refer to follow Is there any damage on projec tion which switches connector Switch Go to step 3 Replace the ABSCM amp H U Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ing Ref to ABS diag 12 ELECTRICAL SPECIFICATION Control Module I O Signal CHECK ABSCM amp H U Measure the resistance between ABSCM amp H U terminals Terminals No 22 No 23 ABSCM amp H U gt Is the resistance more than 1 MQ Go to step 4 Replace the ABSCM amp H U Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Repair the har ness CHECK WIRING HARNESS Measure the resistance between connector and chassis ground Connector amp terminal LHD B301 No 22 Chassis ground RHD F49 No 22 Chassis ground CHECK WIRING HARNESS 1 Connect the connector to ABSCM amp H U 2 Measure the resistance between connector and chassis ground Connector amp terminal LHD B301 No 22 Chassis ground RHD F49 No 22 Chassis ground CHECK POOR CONTACT IN ABSCM amp H U CONNECTOR Is the resistance less than 0 5 Q Go to step 5 Is the resistance more than 1 Go to step 6 Repair the har ness Is there poor contact in ABSCM amp H U connector Repair the con nector Replace the ABSCM amp H U Ref to ABS 6
97. gnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 6 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 70 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS U DTC 42 POWER SUPPLY VOLTAGE TOO LOW DIAGNOSIS Power source voltage of the ABSCM amp H U is low TROUBLE SYMPTOM ABS does not operate EBD may not operate NOTE In addition to the ABS warning light brake warning light illuminates temporarily when the EBD does not op erate Both warning lights go off on the recovery of voltage ABS diag 71 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS WIRING DIAGRAM BATTERY C WP 5 1 ALO GENERATOR ALO 1 a o jane 7a RELAY EE 1 LHD 5 HOLDER 2 AHDS 2 LHD 6 RHD 4 ABS O72 3 LHD RELAY 0007 4 f QE 14115116 19 29 34 35 36 10 27 1 2 112131415 314 6 7 8 9 10 19 20 21 22 17 __ 20 12 13 18 21 22 23 28 31 32 33 38 O1
98. i waa RHD 4 3 LHD 00 ABSCM amp H U SOLENOID a FL INLET zu RR INLET RR OUTLE PEL OUTLET FR INLET OUTLE RL INLET IRL OUTLET 1 273 415 6 7 Ie To Troop aps 21314 16 17 18 19 20 21 22 516 7 8 3 4 s 4 e 14 516 5 2425 35136 37 38 s gt 26 29 34 30 31 32 33 27128 29 30181 23 24 25 26 10 7 508 rq 13 18 21 22123 28 ABS00364 ABS diag 85 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK INPUT VOLTAGE OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Turn the ignition switch to ON 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 25 Chassis ground RHD F49 No 25 Chassis ground Is the voltage 10 15 V Go to step 2 Repair the har ness connector between battery and ABSCM amp H U and check fuse SBF8 CHECK GROUND CIRCUIT OF MOTOR 1 Turn the ignition switch to OFF 2 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 26 Chassis gro
99. inals Connector amp terminal B257 No 2 No 3 Is the voltage 3 3 3 7 V when lateral G sensor is inclined right to 90 Go to step 9 Replace the lateral G sensor lt Ref to ABS 23 Lateral G Sensor gt CHECK LATERAL G SENSOR Measure the voltage between lateral G sensor connector terminals Connector amp terminal B257 No 2 No 3 15 the voltage 0 5 0 9 when lateral G sensor is inclined left to 902 ABS diag 121 Go to step 10 Replace the lateral G sensor lt Ref to ABS 23 Lateral G Sensor gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK ABSCM amp H U 1 Turn the ignition switch to OFF 2 Connect all connectors 3 Erase the memory 4 Perform the inspection mode 5 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 11 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 122 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AL DTC 73 DETECTION OF LATERAL G SENSOR STICK DIAGNOSIS Faulty Lateral G sensor output voltage TROUBLE SYMPTOM ABS does not operate
100. is still being out put Repair the con nector CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Replace the ABSCM amp H U Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Proceed with the diagnosis corre sponding to DTC P DTC 32 FRONT RIGHT OUTLET VALVE MALFUNCTION NOTE For the diagnostic procedure refer to DTC 38 Ref to ABS diag 66 38 REAR LEFT OUTLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Q DTC 34 FRONT LEFT OUTLET VALVE MALFUNCTION NOTE For the diagnostic procedure refer to DTC 38 Ref to ABS diag 66 DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt R DTC 36 REAR RIGHT OUTLET VALVE MALFUNCTION NOTE For the diagnostic procedure refer to DTC 38 Ref to ABS diag 66 DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt Go to step 5 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output A temporary poor contact ABS diag 65 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS S DTC 38 REAR LEFT OUTLET VALVE MALFUNCTION DIAGNOSIS Faulty harness connector Faulty outlet solenoid valve TROUBLE SYMPTOM ABS does not operate EBD does not operate NOTE In ad
101. l con taminated by dirt or other foreign matter Thoroughly remove dirt or other foreign mat ter Go to step 10 CHECK DAMAGE OF ABS WHEEL SPEED SENSOR OR TONE WHEEL Are there broken or damaged teeth in the ABS wheel speed sensor piece or tone wheel Replace the ABS wheel speed sen Sor or tone wheel Front Ref to ABS 13 Front ABS Wheel Speed Sensor Rear Ref to ABS 16 Rear ABS Wheel Speed Sensor and Front Ref to ABS 19 Front Tone Wheel gt Rear lt Ref to ABS 20 Rear Tone Wheel gt Go to step 11 CHECK TONE WHEEL RUNOUT Measure the tone wheel runout Is the runout less than 0 05 mm 0 0020 in Go to step 12 Replace the tone wheel Front lt Ref to ABS 19 Front Tone Wheel gt Rear lt Ref to ABS 20 Rear Tone Wheel gt CHECK ABSCM amp H U 1 Turn the ignition switch to OFF 2 Connect all connectors 3 Erase the memory 4 Perform the inspection mode 5 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 13 CHECK ANY OTHER DTC APPEARANCE L NOTE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC DTC 31 FRONT RIGHT INLET VALVE MALFUNCTION A temporary poor contact For the diagnostic procedure refer to DTC 37 lt Ref t
102. mp terminal LHD B301 No 3 Chassis ground B301 No 31 Chassis ground RHD F49 No 3 Chassis ground F49 No 31 Chassis ground Is the voltage 10 15 V Go to step 4 Repair the har ness connector between TCM and ABSCM amp H U CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nectors between TCM and ABSCM amp H U Repair the con nector Go to step 5 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 6 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 80 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Y DTC 51 VALVE RELAY MALFUNCTION DIAGNOSIS Faulty valve relay TROUBLE SYMPTOM ABS does not operate EBD may not operate NOTE In addition to the ABS warning light brake warning light illuminates when the EBD does not operate WIRING DIAGRAM BATTERY IGNITION SWITCH ABSCM amp H U inet ER OUTLET LaL INLET OUTLET SOLENOID
103. n Noise from ABSCM amp H U ABSCM amp H U mount bushing ABS wheel speed sensor Brake piping Noise from front of vehicle ABSCM amp H U mount bushing ABS wheel speed sensor Master cylinder Brake caliper amp piston pads rotor Brake piping Brake booster amp check valve Suspension play or fatigue Noise from rear of vehicle ABS wheel speed sensor Brake caliper amp piston pads rotor Parking brake Brake piping Suspension play or fatigue ABS diag 127 General Diagnostics Table ABS DIAGNOSTICS ABS diag 128
104. nd data link connector Connector amp terminal LHD B301 No 20 B40 No 5 B301 No 5 B40 No 4 RHD F49 No 20 B40 No 5 F49 No 5 B40 No 4 Is the resistance less than 0 5 Q Go to step 9 Repair the har ness and connec tor between ABSCM amp H U and data link connec tor CHECK INSTALLATION OF ABSCM amp H U CONNECTOR Turn the ignition switch to OFF Is the ABSCM amp H U connector inserted into ABSCM amp H U until the clamp locks onto it ABS diag 38 Go to step 10 Insert the ABSCM amp H U con nector into ABSCM amp H U Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK POWER SUPPLY CIRCUIT 1 Turn the ignition switch to ON engine OFF 2 Measure the ignition power supply voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 4 Chassis ground RHD F49 No 1 Chassis ground Is the voltage 10 15 V Go to step 11 Repair the open circuit in harness between ABSCM amp H U and battery CHECK HARNESS CONNECTOR BETWEEN ABSCM amp H U AND CHASSIS GROUND 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U and transmission 3 Measure the resistance of harness between ABSCM amp H U and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23
105. ng devices such as the headlight A C and defogger 4 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 1 4 Chassis ground 5 RHD F49 No 1 Chassis ground Is the voltage 10 and 17 V Go to step 4 Repair the har ness connector between battery ignition switch and ABSCM amp H U CHECK GROUND CIRCUIT OF ABSCM amp H U 1 Turn the ignition switch to OFF 2 Measure the resistance between ABSCM amp H U connector and chassis ground Connector amp terminal LHD B301 No 23 Chassis ground RHD F49 No 23 Chassis ground Is the resistance less than 0 5 Q Go to step 5 Repair the ABSCM amp H U ground harness CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between generator battery and ABSCM amp H U Repair the con nector Go to step 6 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit gt Go to step 7 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 76 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic
106. o CHECK OUTPUT OF G SENSOR USING Is the G sensor output on mon Go to step 2 Go to step 5 SUBARU SELECT MONITOR itor display 2 1 2 5 V when 1 Select Current data display amp Save on the G sensor is in horizontal posi Subaru Select Monitor tion 2 Read the G sensor output in Subaru Select Monitor data display ABS diag 94 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nector between ABSCM amp H U and G sensor Repair the con nector Go to step 3 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in the cur rent diagnosis still being out put Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 4 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK INPUT VOLTAGE OF G SENSOR 1 Turn the ignition switch to OFF 2 Remove the console box 3 Remove the G sensor from vehicle Do not disconnect connector 4 Turn the ignition switch to ON 5 Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 1 3 Is the voltage 4 75 5 25 V
107. o ABS diag 63 DTC 37 REAR LEFT INLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt M DTC 33 FRONT LEFT INLET VALVE MALFUNCTION NOTE For the diagnostic procedure refer to DTC 37 Ref to ABS diag 63 DTC 37 REAR LEFT INLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt N DTC 35 REAR RIGHT INLET VALVE MALFUNCTION NOTE For the diagnostic procedure refer to DTC 37 Ref to ABS diag 63 DTC 37 REAR LEFT INLET VALVE MALFUNCTION Diagnostics Procedure with Diagnostic Trouble Code DTC gt ABS diag 62 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS O DTC 37 REAR LEFT INLET VALVE MALFUNCTION DIAGNOSIS Faulty harness connector Faulty inlet solenoid valve TROUBLE SYMPTOM ABS does not operate EBD does not operate NOTE In addition to the ABS warning light brake warning light illuminates ABS diag 63 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS WIRING DIAGRAM BATTERY C WP 5 1 ALO GENERATOR ALO 1 a o jane 7a RELAY EE 1 LHD 5 HOLDER 2 AHDS 2 LHD 6 RHD 4 ABS O72 3 LHD RELAY 0007 4 f QE 14115116 19 29 34 35 36 10 27 1 2 112131415 314 6 7 8 9 10 19 20 21
108. o to step 4 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the diagnosis corre sponding to DTC A temporary poor contact CHECK FREEZE FRAME DATA 1 Select Freeze frame data on the Subaru Select Monitor 2 Read front right wheel speed on the Subaru Select Monitor display Is the front right wheel speed on monitor display O km h 0 MPH Go to step 6 Go to step 16 CHECK FREEZE FRAME DATA Read front left wheel speed on the Subaru Select Monitor display Is the front left wheel speed on monitor display O km h 0 MPH Go to step 7 Go to step 16 CHECK FREEZE FRAME DATA Read rear right wheel speed on the Subaru Select Monitor display Is the rear right wheel speed on monitor display O km h 0 MPH Go to step 8 Go to step 16 CHECK FREEZE FRAME DATA Read rear left wheel speed on the Subaru Select Monitor display Is the rear left wheel speed on monitor display 0 km h 0 MPH Go to step 9 Go to step 16 CHECK FREEZE FRAME DATA Read lateral G sensor output on the Subaru Select Monitor display Is the lateral G sensor output on monitor display more than 3 65 V Go to step 10 Go to step 16 CHECK OPEN CIRCUIT IN LATERAL G SEN SOR OUTPUT HARNESS AND GROUND HARNESS 1 Turn the ignition switch to OFF 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance between ABSCM amp H U connector terminals
109. on brake pedal Operating time b Operating noise 0 Produce Does not produce What kind of noise Knock Gong gong Bong Buzz Gong gong buzz Others c Reaction force of brake pedal Stick J Press down once with a clunk Press and released Others Behavior of vehicle 8 Directional stability cannot be obtained or steering refuses to work when applying brakes Yes No When Vehicle turns to right Vehicle turns to left Spins Others b Directional stability cannot be obtained or steering refuses to work when accelerating Yes No When Vehicle turns to right Vehicle turns to left Spins Others C Brakes out of order Yes No What Braking distance is long Brakes lock or drag Pedal stroke is long Pedal sticks Others d Poor acceleration Yes C No What Fails to accelerate J Engine stalls Others e Occurrence of vibration Yes No Where What kind f Occurrence of abnormal noise Yes No Where What kind g Occurrence of other phenomena Yes No What kind ABS diag 6 Check List for Interview ABS DIAGNOSTICS 4 CONDITIONS UNDER WHICH TROUBLE OCCURS Environment a Weather Fine Cloudy Rainy Snowy Various Othe
110. on the Subaru Select Monitor 2 Read the Subaru Select Monitor display Is the G sensor output on mon itor display 2 1 2 5 V when the vehicle is in horizontal posi tion Go to step 3 Go to step 8 CHECK OUTPUT OF G SENSOR USING SUBARU SELECT MONITOR 1 Turn the ignition switch to OFF 2 Remove the console box 3 Remove the G sensor from vehicle Do not disconnect the connector 4 the ignition switch to ON 5 Select Current data display amp Save on the Subaru Select Monitor 6 Read the Subaru Select Monitor display Is the voltage 3 7 4 1 V when G sensor is inclined for wards to 90 Go to step 4 Replace the G sensor to ABS 21 G Sen sor gt CHECK OUTPUT OF G SENSOR USING SUBARU SELECT MONITOR Read the Subaru Select Monitor display Is the voltage 0 5 0 9 V when G sensor is inclined backwards to 90 Go to step 5 Replace the G sensor lt Ref to ABS 21 G Sen sor gt CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nector between ABSCM amp H U and G sensor Repair the con nector Go to step 6 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp
111. onnector to ABSCM amp H U the ignition switch to ON 4 Measure the voltage between lateral G sen sor connector terminals Connector amp terminal B257 2 No 3 Is the voltage 2 1 2 5 V when lateral G sensor is in hor izontal position Go to step 19 Replace the lateral G sensor Ref to ABS 23 Lateral G Sensor CHECK LATERAL G SENSOR Measure the voltage between lateral G sensor connector terminals Connector amp terminal B257 2 No 3 Is the voltage 3 3 3 7 V when lateral G sensor is inclined right to 90 ABS diag 117 Go to step 20 Replace the lateral G sensor lt Ref to ABS 23 Lateral G Sensor gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK LATERAL G SENSOR Is the voltage 0 5 0 9 V Go to step 21 Replace the lateral Measure the voltage between lateral sensor when lateral sensor is G sensor Ref to connector terminals inclined left to 90 ABS 23 Lateral G Connector amp terminal Sensor B257 No 2 No 3 CHECK POOR CONTACT IN CONNECTORS 15 there poor contact in Repair the con Go to step 22 Turn the ignition switch to OFF nector between ABSCM amp H U and lateral G sensor CHECK ABSCM amp H U Is the same DTC as in current Replace the Go to step 23 1 Connect all connectors diagnosis still being outpu
112. ont ABS wheel speed sensor LH is displayed in km h or mile h RR wheel speed Wheel speed detected by Rear ABS wheel speed sensor RH is displayed in km h or mile h RL wheel speed Wheel speed detected by Rear ABS wheel speed sensor LH is displayed in km h or mile h power voltage Power in volts supplied to ABSCM amp H U appears on the Subaru Select Moni tor display G sensor output voltage Voltage equivalent to vehicle accelera tion detected by analog G sensor is dis played Lateral G sen Sor output volt age Voltage equivalent to Lateral G detected by analog Lateral G sensor is displayed Motor relay mon itor Motor relay operation monitor signal Stop light switch Stop light switch signal ABS signal to TCM ABS operation signal from ABS control module to TCM ABS AT control ABS operation signal from ABS control module to TCM ABS operation signal ABS operation signal Condition of malfunction Displays if the malfunction has occurred to ABS only or to ABS and EBD 6 ANALOG DATA ARE DISPLAYED Display screen Contents to be monitored FR wheel speed Wheel speed detected by Front ABS wheel speed sensor RH is displayed in km h or mile h FL wheel speed Wheel speed detected by Front ABS wheel speed sensor LH is displayed in km h or mile h Display screen Contents to be monitored RR wheel speed
113. or CHECK BATTERY SHORT OF ABS WHEEL SPEED SENSOR 1 Turn the ignition switch to ON 2 Measure the voltage between ABS wheel speed sensor and chassis ground Terminals Front RH No 1 4 Chassis ground Front LH No 1 Chassis ground Rear RH No 1 Chassis ground Rear LH 1 Chassis ground Is the voltage less than 1 V Go to step 11 Replace the ABS wheel speed sen sor Front Ref to ABS 13 Front ABS Wheel Speed Sensor Rear Ref to ABS 16 Rear ABS Wheel Speed Sensor CHECK HARNESS CONNECTOR BETWEEN ABSCM amp H U AND ABS WHEEL SPEED SENSOR 1 Turn the ignition switch to OFF 2 Connect the connector to ABS wheel speed sensor 3 Measure the resistance between ABSCM amp H U connector terminals Connector amp terminal DTC 21 LHD B301 No 11 No 12 RHD F49 No 11 No 12 DTC 23 LHD B301 No 9 No 10 RHD F49 No 9 No 10 DTC 25 LHD B301 No 14 No 15 RHD F49 No 14 No 15 DTC 27 LHD B301 No 7 No 8 RHD F49 No 7 No 8 Is the resistance as following value Front 1 1 5 Rear 1 025 1 265 ABS diag 48 Go to step 12 Repair the har ness connector between ABSCM amp H U and ABS wheel speed sensor Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK BATTERY SHORT OF HARNESS Mea
114. or and chassis ground Connector amp terminal LHD B301 No 29 Chassis ground RHD F49 No 29 Chassis ground Is the resistance more than 1 Go to step 8 Repair the har ness between lat eral G sensor and ABSCM amp H U CHECK LATERAL G SENSOR 1 Connect the connector to lateral G sensor 2 Connect the connector to ABSCM amp H U the ignition switch to ON 4 Measure the voltage between lateral G sen sor connector terminals Connector amp terminal B257 No 2 No 3 Is the voltage 2 1 2 5 V when lateral G sensor is in hor izontal position Go to step 9 Replace the lateral G sensor Ref to ABS 23 Lateral G Sensor CHECK LATERAL G SENSOR Measure the voltage between lateral G sensor connector terminals Connector amp terminal B257 2 No 3 Is the voltage 3 7 4 1 V when lateral G sensor is inclined right to 90 ABS diag 112 Go to step 10 Replace the lateral G sensor lt Ref to ABS 23 Lateral G Sensor gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK LATERAL G SENSOR Is the voltage 0 5 0 9 V Go to step 11 Replace the lateral Measure the voltage between lateral sensor when lateral sensor is G sensor Ref to connector terminals inclined left to 90 ABS 23 Lateral G Connector amp terminal Sensor B257 No 2
115. pair the ABSCM amp H U ground harness CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between generator battery and ABSCM amp H U Repair the con nector Go to step 4 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 5 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 82 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Z DTC 51 VALVE RELAY ON FAILURE DIAGNOSIS Faulty valve relay TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM BATTERY SBF 1 OND IGNITION SWITCH ABSCM amp H U FR_INLET L a RL INLET zm a OUTLET SOLENOID a FL_INLET m FL OUTLET a RR INLET m RR OUTLE 1i 2 s 4 s rx e v e e t 1 2 10 15 16 19 17 20 18 21 22 11 12 13 ABS00362 ABS diag 83 Diagnostics Procedure with Di
116. pears on the Subaru Select Monitor display This shows it may be an unreliable reading Contents to be monitored The most recent DTC appears on Sub aru Select Monitor display The second most recent DTC appears on Subaru Select Monitor display The third most recent DTC appears on Subaru Select Monitor display DTC issued after elapse of a specified period of time Display screen Current Old Older Before 3 ABS diag 16 Subaru Select Monitor ABS DIAGNOSTICS 2 READ CURRENT DATA 1 On the Main Menu display screen select the Each System Check and press YES key 2 On the System Selection Menu display screen select the Brake Control System and press YES key 3 Press the YES key after the information of ABS type is displayed 4 On the Brake Control Diagnosis display screen select the Current Data Display amp Save and press YES key 5 On the Data Display Menu display screen select the Data Display and press YES key 6 Using the scroll key move the display screen up or down until desired data is shown A list of the support data is shown in the following table Display screen Contents to be monitored Unit of measure FR Wheel Speed Wheel speed detected by Front ABS wheel speed sensor RH is km h or MPH displayed FL Wheel Speed Wheel speed detected by Front ABS wheel speed sensor LH is km
117. r bat tery and ABSCM amp H U Repair the con nector Go to step 7 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 8 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 90 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AD DTC 54 STOP LIGHT SWITCH SIGNAL CIRCUIT MALFUNCTION DIAGNOSIS Faulty stop light switch TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM BATTERY STOP LIGHT SWITCH STOP LIGHT WITHOUT CRUISE CONTROL WITH CRUISE CONTROL 1 LHD 112 1 2 11213 1516 1718 94 18 4 19 20121122 7 15 16 7 8 ABS00479 Step Check Yes No CHECK OUTPUT OF STOP LIGHT SWITCH 15 the reading indicated Go to step 2 Go to step 3 USING SUBARU SELECT MONITOR monitor display less than 1 5 1 Select Current data display amp Save on the V Subaru Select Monitor 2 Release the brake pedal 3 Read the stop light switch output in Subaru Select Monitor data display ABS diag 91
118. rs b Ambient temperature c Road Urban area Suburbs Highway General road Ascending slope Descending slope Paved road Gravel road Muddy road Others d Road surface Dry Wet New fallen snow Compressed snow Frozen slope Others Condition a Brakes Deceleration Continuous Intermittent b Accelerator Acceleration Continuous Intermittent Vehicle speed km h Advancing Accelerating Reducing speed Low speed Turning Others d Tire inflation pressure Front RH tire Front LH tire Rear RH tire Rear LH tire Degree of wear Front RH tire Front LH tire Rear RH tire Rear LH tire f Genuine parts are used Yes No 9 Chain is passed around tires Yes C No h T tire is used Yes No i Condition of suspension alignment j Loading state k Repair parts are used Yes No What Others ABS diag 7 General Description ABS DIAGNOSTICS 3 General Description A CAUTION 1 SUPPLEMENTAL RESTRAINT SYSTEM AIRBAG Airbag system wiring harness is routed near the ABS wheel speed sensor ABS control module and hydraulic control unit CAUTION All airbag system wiring h
119. ster cylinder terminals Terminals No 1 No 2 Is the resistance more than 1 Go to step 3 Replace the mas ter cylinder CHECK PARKING BRAKE SWITCH 1 Disconnect the connector R4 from parking brake switch 2 Release the parking brake switch 3 Measure the resistance between parking brake switch terminal and chassis ground Is the resistance more than 1 Go to step 4 Replace the park ing brake switch CHECK GROUND SHORT OF HARNESS 1 Disconnect the connector form ABSCM amp H U 2 Disconnect the connector i2 or i1 from combination meter the ignition switch to ON Does the brake warning light go off Go to step 5 Repair the har ness CHECK POOR CONTACT IN ABSCM amp H U Is there poor contact in ABSCM amp H U connector ABS diag 36 Repair the con nector Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS 13 Diagnostics Procedure with Diagnostic Trouble Code DTC A COMMUNICATION FOR INITIALIZING IMPOSSIBLE DIAGNOSIS Faulty harness connector TROUBLE SYMPTOM Communication cannot be executed between ABS and Subaru select monitor WIRING DIAGRAM BATTERY P
120. sure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal DTC 21 LHD B301 11 Chassis ground RHD F49 No 11 4 Chassis ground 9 DTC 23 LHD B301 9 Chassis ground RHD F49 No 9 Chassis ground DTC 25 LHD B301 No 14 Chassis ground RHD F49 14 Chassis ground DTC 27 LHD B301 No 7 Chassis ground RHD F49 No 7 Chassis ground Is the voltage less than 1 V Go to step 13 Repair the har ness between ABSCM amp H U ABS wheel speed sensor CHECK BATTERY SHORT OF HARNESS 1 Turn the ignition switch to ON 2 Measure the voltage between ABSCM amp H U connector and chassis ground Connector amp terminal DTC 21 LHD B301 11 Chassis ground RHD F49 No 11 4 Chassis ground DTC 23 LHD B301 No 9 Chassis ground RHD F49 No 9 Chassis ground DTC 25 LHD B301 No 14 Chassis ground RHD F49 14 Chassis ground DTC 27 LHD B301 No 7 Chassis ground RHD F49 No 7 Chassis ground Is the voltage less than 1 V Go to step 14 Repair the har ness between ABSCM amp H U ABS wheel speed sensor CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR Are the ABS wheel speed sen sor installation bolts tightened
121. t only 2 Erase the memory lt Ref to ABS 6 3 Perform the inspection mode ABS Control Mod 4 Read out the DTC ule and Hydraulic Control Unit ABSCM amp H U gt CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output Proceed with the A temporary poor diagnosis corre sponding to DTC ABS diag 118 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AK DTC 73 ABNORMAL LATERAL SENSOR HIGH u OUTPUT DIAGNOSIS Faulty Lateral G sensor output voltage TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167 19 20 21 22 27 28 29 30 31 23 26 Nj mp ABS00368 ABS diag 119 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS RHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR ABS ABS G SENSOR LATERAL G SENSOR STi MODEL 5 5 aD 11213 4
122. the resistance between ABS wheel speed sensor connector terminals while shak ing the harness lightly Terminals Front RH No 1 No 2 Front LH No 1 No 2 Rear RH No 1 No 2 Rear LH No 1 No 2 Is the resistance as following value Front 1 1 5 Rear 1 025 1 265 Go to step 16 Replace the ABS wheel speed sen sor Front Ref to ABS 13 Front ABS Wheel Speed Sensor Rear Ref to ABS 16 Rear ABS Wheel Speed Sensor CHECK GROUND SHORT OF ABS WHEEL SPEED SENSOR Measure the resistance between ABS wheel speed sensor and chassis ground Terminals Front RH No 1 Chassis ground Front LH No 1 Chassis ground Rear RH No 1 Chassis ground Rear LH No 1 Chassis ground Is the resistance more than 1 Go to step 17 Replace the ABS wheel speed sen sor Front Ref to ABS 13 Front ABS Wheel Speed Sensor Rear Ref to ABS 16 Rear ABS Wheel Speed Sensor CHECK HARNESS CONNECTOR BETWEEN ABSCM amp H U AND ABS WHEEL SPEED SENSOR 1 Connect the connector to ABS wheel speed sensor 2 Disconnect the connector from ABSCM amp H U 3 Measure the resistance at ABSCM amp H U connector terminals Connector amp terminal DTC 22 LHD B301 11 12 RHD F49 No 11 No 12 DTC 24 LHD B301 No 9 No 10 RHD F49 No 9 No 10 DTC 26 LHD B301 No 14 No 15 RHD F49 No 14 No 15 DTC 28
123. the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 No 3 Is the voltage 3 7 4 1 when G sensor is inclined for wards to 90 Go to step 9 Replace the G sensor to ABS 21 G Sen sor gt CHECK G SENSOR Measure the voltage between G sensor con nector terminals Connector amp terminal B292 No 2 No 3 Is the voltage 0 5 0 9 V when G sensor is inclined backwards to 90 ABS diag 104 Go to step 10 Replace the G sensor lt Ref to ABS 21 G Sen sor gt Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK ABSCM amp H U 1 Turn the ignition switch to OFF 2 Connect all connectors 3 Erase the memory 4 Perform the inspection mode 5 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 11 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 105 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AH DTC 56 DETECTION OF G SENSOR STICK DIAGNOSIS Faulty G sensor output voltage TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM
124. tion Vehicle must be driven at approx 12 km h 7 46 MPH or faster to turn off ABS warn ing light Make sure that the ABS warning light goes off after driving ve hicle Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS K DTC 29 ABNORMAL ABS WHEEL SPEED SENSOR SIGNAL ON ANY ONE OF FOUR SENSOR DIAGNOSIS Faulty ABS wheel speed sensor signal noise irregular signal etc Faulty tone wheel Wheels turning freely for a long time TROUBLE SYMPTOM ABS does not operate EBD does not operate NOTE In addition to the ABS warning light brake warning light illuminates ABS diag 58 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS WIRING DIAGRAM LHD MODEL ABSCM amp H U be Fe hel 5 5 J8 029 1 0 1 1 x l l 1 1 1 1 2 I 1 1 be 1 1 we 1 SIE aie gt SHIELD JOINT 1 1 1 1 1 d 1 1 lt 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I I lt 1 1 1 1 7 1 I 1 nik 1 1 1 1 I 1 1 1 1 1 I 1 lt i 1 1 I 1 1 1 I 1 I 1 I 1 1 1 ZU I 1 I 1 B uj i i E I 1 Se 1 a a I 1 E z e r o 27 6 FRONT ABS REAR REAR SENSOR LH SENSOR RH ABS ABS SENSOR LH SENSOR RH 9 GD 20
125. to ABS 16 Rear ABS Wheel Speed Sensor and Ref to ABS 6 ABS Control Module and Hydraulic Control Unit ABSCM amp H U gt CHECK GROUND SHORT OF HARNESS 1 Turn the ignition switch to OFF 2 Connect the connector to ABS wheel speed sensor 3 Measure the resistance between ABSCM amp H U connector terminal and chassis ground Connector amp terminal DTC 21 LHD B301 No 11 Chassis ground RHD F49 No 11 Chassis ground DTC 23 LHD B301 No 9 Chassis ground RHD F49 No 9 Chassis ground DTC 25 LHD B301 No 14 Chassis ground RHD F49 No 14 Chassis ground DTC 27 LHD B301 No 7 Chassis ground RHD F49 No 7 Chassis ground Is the resistance more than 1 MQ Go to step 19 Repair the har ness between ABSCM amp H U and ABS wheel speed sensor And replace the ABSCM amp H U lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U CHECK POOR CONTACT IN CONNECTORS Is there poor contact in con nectors between ABSCM amp H U and ABS wheel speed sensor ABS diag 50 Repair nector the con Go to step 20 Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK ABSCM amp H U Is the same DTC as in current Replace the Go to step 21 1 Connect all connectors diagnosis still being output ABSCM only 2 Erase the memory 3 Perform the inspection mode
126. to OFF Is there poor contact in con nector between ABSCM amp H U and G sensor Repair the con nector Go to step 22 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 23 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 101 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AG DTC 56 ABNORMAL SENSOR HIGH u OUTPUT DIAGNOSIS Faulty G sensor output voltage TROUBLE SYMPTOM ABS does not operate WIRING DIAGRAM LHD MODEL ABSCM amp H U SHIELD JOINT CONNECTOR JOINT CONNECTOR LATERAL G SENSOR Mum aue Mmmm Sees 5 5 5 G SENSOR G SENSOR LATERAL G EXCEPT STi MODEL STi MODEL SENSOR STi MODEL a 72 3 4516 TAE 1 2 7 8 9 167 19 20 21 22 27 28 29 30 31 23 26 Nj mp ABS00368 ABS diag 102 Diagnostics Procedure with Diagnostic Trouble Code DT
127. to follow ing Ref to ABS diag 12 ELECTRICAL SPECIFICATION Control Module I O Signal Is there any damage on projec tion which switches connector Switch Replace the ABSCM only Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Go to step 9 CHECK ABSCM amp H U Measure the resistance between ABSCM amp H U terminals Terminals No 22 No 23 Is the resistance more than 1 MQ ABS diag 32 Go to step 10 Replace the ABSCM amp H U Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U Diagnostics Procedure without Diagnostic Trouble Code DTC ABS DIAGNOSTICS Step Check Yes No CHECK WIRING HARNESS Measure the resistance between connector B37 and chassis ground Connector amp terminal LHD B37 No 15 Chassis ground RHD B37 No 1 Chassis ground Is the resistance less than 0 5 Q Go to step 11 Repair the har ness CHECK WIRING HARNESS 1 Connect the connector to ABSCM amp H U 2 Measure the resistance between connector B37 and chassis ground Connector amp terminal LHD B37 No 15 Chassis ground RHD B37 No 1 Chassis ground Is the resistance more than 1 Go to step 12 Repair the har ness CHECK POOR CONTACT IN ABSCM amp H U CONNECTOR Is there poor contact in ABSCM amp H U connector ABS diag 33 Repair the con
128. und RHD F49 No 26 Chassis ground Is the resistance less than 0 5 Q Go to step 3 Repair the ABSCM amp H U ground harness CHECK MOTOR OPERATION Operate the sequence control lt Ref to ABS 10 ABS Sequence Control gt NOTE Use the diagnosis connector to operate se quence control Can motor revolution noise buzz be heard when carrying out the check sequence Go to step 4 Replace the ABSCM amp H U lt Ref to ABS 6 ABS Control ule and Hydraulic Control Unit ABSCM amp H U gt CHECK POOR CONTACT IN CONNECTORS Turn the ignition switch to OFF Is there poor contact in con nector between generator bat tery and ABSCM amp H U Repair the con nector Go to step 5 CHECK ABSCM amp H U 1 Connect all connectors 2 Erase the memory 3 Perform the inspection mode 4 Read out the DTC Is the same DTC as in current diagnosis still being output Replace the ABSCM only lt Ref to ABS 6 ABS Control Mod ule and Hydraulic Control Unit ABSCM amp H U gt Go to step 6 CHECK ANY OTHER DTC APPEARANCE Are other DTCs being output ABS diag 86 Proceed with the diagnosis corre sponding to DTC A temporary poor contact Diagnostics Procedure with Diagnostic Trouble Code DTC ABS DIAGNOSTICS AB DTC 52 MOTOR RELAY ON FAILURE DIAGNOSIS Faulty motor Faulty motor relay Faulty harness connector TROUBLE SYMPTOM

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