Fuel and Emission Sy..
Contents
1. 35 5 RN BLK 9 BLK VYEL IMOFPR P COIL 1 STARTER CUT RELAY ST CUT 41 BARO SENSOR Built Into the ECM PCM gt 2 UNDER DASH FUSE RELAY BOX No 4 A F SENSOR 10 23 IGP 7 5A 216 COIL 15 No 18 ACG 15A IGNITION SWITCH No 19 FUEL PUMP 15A and STATIM No 30 A C 7 5A No 32 7 5A i No 1 THROTTLE ACTUATOR CONTROL 15A FUEL PUMP G01822039 Fig 71 Evaporative Emission EVAP System Wiring Diagram 11 Of 11 HOW TO SET READINESS CODES Malfunction Indicator Lamp MIL Indication In relation to Readiness Codes The vehicle has certain readiness codes that are part of the on board diagnostics for the emissions systems If the vehicle s battery has been disconnected or gone dead if the DTCs have been cleared or if the ECM PCM Wednesday March 12 2008 2 05 58 AM Page 68 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX has been reset these readiness codes are reset In some states part of the emissions testing is to make sure these codes are set to complete If all of them are not set to complete the vehicle may fail the emission test or the test cannot be finished To check if the readiness codes are set to complete turn the ignition switch ON but do not start the engine The MIL will come on for 15 20 seconds If2. BLU WH 3 VTC OIL CONTROL SOLENOID VALVE G01822030 Fig 62 Evaporative Emission EVAP System Wiring Diagram 2 Of 11 Wednesday March 12 2008 2 05 57 AM Page 59 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX uni _ 562 qen RED YEL IAT IAT SENSOR ECT SENSOR HER BLU YEL BLU YEL 2 _ mcs BLK YEL 1 ENGINE MOUNT CONTROL SOLENOID VALVE BRN YEL 24P JUNCTION CONNECTOR BRN YEL BLK YEL 3 1 BLU WHT 2 BRN YEL CMP SENSOR A G01822031 Fig 63 Evaporative Emission EVAP System Wiring Diagram 3 Of 11 Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX J 7777 REVERSELOCK SOLENOID VALVE BLK YEL BLK YEL 24P JUNCTION CONNECTOR BLK YEL 1 YEL BLU EVAP CANISTER PURGE VALVE BLK YEL BLK YEL 1 WHT BLU WHT BLU 3 WHT RED WHT RED 9 WHT GRN WHT GRN 2 24P JUNCTION ALTERNATOR CONNECTOR 3 1 SPARK 2 ICM PLUG BL No 1 IGNITION COIL 7 SPARK y PLUG No 2 IGNITION COIL To SPARK PLUG No 3 IGNITION COIL To SPARK y PLUG No 4 IGNITION COIL G01822032 Fig 64 Evaporative Emission EVAP System Wiring Diagram 4 Of 11 Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX
3. INTAKE AIR TEMPERATURE SENSOR WHT GRN ALTC ALTERNATOR CONTROL SEFD THROTTLE ACTUATOR CONTROL SERIAL SIGNAL SEDF THROTTLE ACTUATOR CONTROL SERIAL SIGNAL EVAPORATIVE EMISSION CANISTER PURGE VALVE YEL BLU Detects IAT sensor signal With ignition switch ON II about 0 5 V 4 8 V depending on intake air temperture With engine running and fully warmed up about 8 V Sends alternator control signal _ Sends throttle actuator control serial signal Detects throttle actuator control serial signal With engine running engine coolant below 131F 55 C battery voltage With engine running engine coolant above 131 55 duty controlled Drives EVAP canister purge valve G01821989 Fig 23 ECM PCM Connector B 24P Pin Voltage Chart PCM INPUTS amp OUTPUTS AT CONNECTOR C 22P Wednesday March 12 2008 2 05 57 AM Page 24 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 1 2 3 4 5 6 7 LSA SHC SHE SHB SHD SHA LSC VA ATPD3 ow sw avs SW ATFT LSB 17 19 20 NM Wire side of female terminals G01821990 Fig 24 Identifying ECM PCM Connector C 22P Terminals NOTE Standard battery voltage is 12 V Wednesday March 12 2008 2 05 57 AM Page 25 2004 Acura TSX Terminal Wire color number 2004 ENGINE PERFORMANCE Fuel amp Emissi
4. Check the fuel pressure Inspect adjust the throttle cable Engine stalls MIL works OK no DTCs set Low compression Incorrect camshaft timing Incorrect engine oil level Do the ECM PCM idle learn procedure Check the fuel pressure Check the idle speed Troubleshoot the brake pedal position switch signal circuit Intake air leaks Faulty harness and sensor connections G01821977 Fig 12 Symptom Troubleshooting Index 1 Of 2 _ Symptom Difficult to refuel MIL works OK no DTCs set 3 Diagnostic procedure Alsocheckfor Check the fuel vent tube between the EVAP canister and Malfunctioning gas the fuel tank Check the fuel tank vapor recirculation tube between the fuel pipe and the fuel tank Replace the fuel tank station filling nozzle Fuel overflows during refueling No DTCs set 01821978 Replace the fuel tank Malfunctioning gas station filling nozzle Fig 13 Symptom Troubleshooting Index 2 Of 2 SYSTEM DESCRIPTIONS 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX ELECTRONIC CONTROL SYSTEM The functions of the fuel and emission control systems are managed by the engine control module ECM on vehicles with manual transmissions or the powertrain control module PCM on vehicles with automatic transmissions FAIL SAFE FUNCTION When an abnormality occurs in the signal from a sensor the ECM PCM i
5. BLUWHT VTC VTC OIL CONTROL SOLENOID VALVE Description Signal Drives VTC oil control solenoid valve With ignition switch ON INJ4 4 INJECTOR INJ3 No 3 INJECTOR Drives 4 injector __ At idle duty controlled INJ2 No 2INJECTOR INJ1 No 1 INJECTOR Drives No 3 injector With ignition switch ON 10 battery voltage Drives No 2 injector Drives No 1 injector _ GRN YEL SOLENOID VALVE _ ECT ENGINE COOLANT TEMPERATURE SENSOR RED WHT Drives VTEC solenoid valve At idle about 0 V With ignition switch ON Il about 0 5 4 8 V depending on engine coolant temperature With fully warmed up engine about 0 5 0 7 V Detects ECT sensor signal ALTL ALTERNATOR L _______ SIGNAL _ BLU BLK VTPSW VTEC OIL PRESSURE SWITCH WHT RED ALTERNATOR FR SIGNAL _______ MCS ENGINE MOUNT CONTROL SOLENOID VALVE WHT BLU BLU YEL Detects alternator signal With ignition switch ON 11 about 0 V With engine running battery voltage Detects VTEC oil pressure With engine at low speed about 0 V switch signal With engine at high speed battery voltage Detects alternator FR signal With engine running about 0 V 5 V depending on electrical load At idle about 0 V Above idle battery voltage With ignition switch ON battery voltage Drives engine mount control solenoid valve 17 RED YEL
6. TSX YEL RED APP SENSOR C251 22 6 BLU 13 RED BLU 2 RED BLK THROTTLE ACTUATOR CONTROL MODULE se TesENsOR RED BLK RED BLU GR BLU is THROTTLE ACTUATOR THROTTLE BODY YEL BLK 2 WHT GRN 3 4 THROTTLE ACTUATOR CONTROL MODULE RELAY G01822037 Fig 69 Evaporative Emission EVAP System Wiring Diagram 9 Of 11 Wednesday March 12 2008 2 05 57 AM Page 66 UNDER HOOD FUSE RELAY BOX 23 B IG MAIN 504 No 19 OPTION 40A No 8 FI ECU 15A 4 No 13 HORN STOP 20A No 22 BATTERY 100A G01822038 2004 Ac 2004 ENGINE PERFORMANCE 28P JUNCTION CONNECTOR 28P JUNCTION CONNECTOR 28P JUNCTION CONNECTOR 28P JUNCTION CONNECTOR ura TSX Fuel amp Emissions Systems TSX DATA LINK CONNECTOR BRAKE PEDAL POSITION SWITCH Brake pedal pressed closed Brake pedal released open Brake pedal pressed open Brake pedal released closed A C CLUTCH RELAY GRI RADIATOR FAN RELAY LK RED 3 LK 2 Fig 70 Evaporative Emission EVAP System Wiring Diagram 10 Of 11 Wednesday March 12 2008 2 05 58 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX UNDER DASH FUSE RELAY BOX Es BLU WHT A F SENSOR YEL BLK 28P JUNCTION CONNECTOR RED YEL BLK YEL RN YEL BLK WHT 2 LT
7. valve MRLY PGM FI MAIN RELAY AFSHTCR FUEL RATIO A F SENSOR HEATER CONTROL RELAY Ground for ECM PCM control circuit With ignition switch ON II in the Park position brake pressed and accelerator released 0 V Drives reverse lock solenoid With vehicle speed below 9 4 mph 15 km h battery voltage With vehicle speed above 12 5 mph 20 km h 0 V Less than 1 0 V at all times Drives PGM FI main relay 1 FI MAIN Power source for DTC memo Drives A F sensor heater relay WHT IG1 IGNITION SIGNAL CAN H CAN Detects ignition signal Sends communication COMMUNICATION SIGNAL signal HIGH GRN FANC RADIATOR FAN CONTROL LT GLN BLU BLK FTP FUEL TANK PRESSURE FTP SENSOR ELD ELECTRICAL LOAD DETECTOR With ignition switch OFF about 0 V With ignition switch ON 1 about 0 V With ignition switch OFF battery voltage With ignition switch ON Il 0 V With ignition switch ON Il battery voltage With ignition switch OFF about 0 V With ignition switch ON 11 pulses Drives radiator fan relay Detects FTP sensor signal Detects ELD signal BLU YEL With radiator fan running about 0 V With radiator fan stopped battery voltage With ignition switch ON 11 and fuel fill cap open about25 V __ __________ With ignition switch ON about 0 1 V 4 8 V __ depending on electrical loa
8. GRN YEL ATF TEMPERATURE SENSOR BLU L HIFT SOLENOID VALVE POR SHIFT SOLENOID VALVE B GRN SHIFT SOLENOID VALVE C 1 SHIFT SOLENOID VALVE D Reo SHIFT SOLENOID VALVE E A EL RED BLK 1 LSA BLK A T CLUTCH PRESSURE CONTROL SOLENOID VALVE A A T CLUTCH PRESSURE i CONTROL SOLENOID VALVE B 1 5 ise BLU YEL BLK A T CLUTCH PRESSURE CONTROL SOLENOID VALVE C 6101 YEL RED MAINSHAFT SPEED SENSOR 18 BLK NG BLU RN YEL COUNTERSHAFT SPEED SENSOR ntm 6101 601822033 Fig 65 Evaporative Emission EVAP System Wiring Diagram 5 Of 11 Wednesday March 12 2008 2 05 57 AM Page 62 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 28P JUNCTION CONNECTOR 9 17 18 BLU BLK WHT BLU BLK a C152 BLU WHT H LBLU WHT 4 10 BLU BLK 24 BLK BLU WHT GRN WHT RED BLK 8 RED BLK YEL GRN L4 RED 5 24 RED WHT 24 WHT RED BLK 3 C TRANSMISSION RANGE SWITCH 1 C18 pm BLU YEL ATPFWD 1 c2 m RED WHT ATPRVS 2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH BLU RED 3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH C201 A cu 4 4 M BLU VEL BLU Pes P PINSW 2 PARK PIN 65
9. P2122 37 Accelerator Pedal Position APP Sensor A Throttle Position Sensor D Circuit Low Voltage ERA REGE Accelerator Pedal Position APP Sensor A Throttle Position Sensor D Circuit High Voltage 3 Accelerator Pedal Position APP Sensor Throttie Position Sensor E Circuit Low Valtag P2128 37 Ea Accelerator Pedal Position APP Sensor B Throttle Position Sensor E Circuit High Voltage P2135 __ Throttle Position TP Sensor Incorrect Voltage Correlation Accelerator Pedal Position APP Sensor A B Throttle Position Sensor D E Incorrect Voltage Correlation The icator and MIL may come on simultaneously 1 These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS 2 AIT 3 M T 4 With Navigation System G01821975 Fig 10 DTC Troubleshooting Index 2 Of 3 Wednesday March 12 2008 2 05 57 AM Page 13 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX UE e RN indication Bre Temporary _ P2195 48 JjAirFuel Ratio A F Sensor Sensor 1 Signal Stuck Lean P2227 13 2228 13 Barometric Pressure BARO Sensor Circuit Low Voltage P2229 13 Barometric Pressure BARO Sensor Circuit Hig P2238 48 Air Fuel Ratio A F Sensor Sensor 1 AFS Line Low Voltage P2252 48 Air Fuel Ratio A F Sensor Sensor 1 AFS Line Low Voltage P2279 109 ___ Foe
10. is energized whenever the ignition switch is ON ID to supply battery voltage to the ECM PCM power to the injectors and power for PGM FI main relay 2 FUEL PUMP PGM FI main relay 2 is energized to supply power to the fuel pump for 2 seconds when the ignition switch is turned ON ID and when the engine is cranking or running INTAKE AIR SYSTEM This system supplies air for engine needs Intake Air Bypass Control Thermal Valve When the engine is cold the intake air bypass control thermal valve sends air to the injector The amount of air is regulated by engine coolant temperature Once the engine is hot the intake air bypass control thermal valve closes stopping air to the injector Wednesday March 12 2008 2 05 57 AM Page 50 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX INJECTOR INTAKE AIR BYPASS CONTROL THERMAL VALVE WAX ELEMENT G01822022 Fig 54 Locating Intake Air Bypass Control Thermal Valve Resonator A resonator in the intake air duct provides additional silencing as air is drawn into the engine CATALYTIC CONVERTER SYSTEM Three Way Catalytic Converter TWC The TWC converts hydrocarbons HC carbon monoxide CO and oxides of nitrogen NOX in the exhaust gas to carbon dioxide CO2 nitrogen N2 and water vapor Wednesday March 12 2008 2 05 57 AM Page 51 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX HOUSING THREE WAY CATALYS
11. AM Page 6 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX D 98 1 0 kgf m 7 2 Ibf ft G01821970 Fig 5 Removing The ECM PCM Remove the duct B Disconnect the ECM PCM connectors C Remove the bolts D then remove the ECM PCM E Install the ECM PCM in the reverse order of removal Open the SCS line with the HDS HOW TO TROUBLESHOOT CIRCUITS AT THE ECM PCM Special Tools Required Wednesday March 12 2008 2 05 57 AM Page 7 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX e Digital Multimeter KS AHM 32 003 1 or a commercially available digital multimeter e Backprobe Set 07SAZ 001000A 2 1 Connect the backprobe adapters A to the stacking patch cords B and connect the cords to a digital multimeter 07SAZ 001000A G01821971 Fig 6 Connecting The Backprobe Adapters To The Stacking Patch Cords amp The Cords To A Digital Multimeter Using the wire insulation as a guide for the contoured tip of the backprobe adapter gently slide the tip into the connector from the wire side until it touches the end of the wire terminal Wednesday March 12 2008 2 05 57 AM Page 8 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 3 If you cannot get to the wire side of the connector or the wire side is sealed A disconnect the connector and probe the terminals B from the terminal side Do not force
12. ECM PCM controls current to the throttle actuator to maintain the correct idle speed Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX BRAKE PEDAL POSITION SWITCH The brake pedal position switch signals the ECM PCM when the brake pedal is pressed POWER STEERING PRESSURE PSP SWITCH The PSP switch signals the ECM PCM when the power steering load is high FUEL SUPPLY SYSTEM Fuel Cut off Control During deceleration with the throttle valve closed current to the injectors is cut off to improve fuel economy at engine speeds over 1 000 RPM Fuel cut off control also occurs when the engine speed exceeds 7 300 RPM regardless of the position of the throttle valve to protect the engine from over revving When the vehicle is stopped the ECM PCM cuts the fuel at engine speeds over 5 000 RPM M T 4 500 RPM Engine speed of fuel cut is lower on a cold engine Fuel Pump Control When the ignition is turned on the ECM PCM grounds the PGM FI main relay which feeds current to the fuel pump for 2 seconds to pressurize the fuel system With the engine running the ECM PCM grounds the PGM FI main relay and feeds current to the fuel pump When the engine is not running and the ignition is on the cuts ground to the PGM FI main relay which cuts current to the fuel pump PGM FI MAIN RELAY 1 amp 2 The PGM FI relay consists of two separate relays PGM FI main relay 1 FI MAIN
13. NOTE Do not turn the ignition switch off during the procedure All readiness codes are cleared when the battery is disconnected or when the ECM PCM is cleared with the HDS ENABLE CRITERIA ECT at 140 F 60 C or higher PROCEDURE Start the engine Test drive the vehicle under stop and go conditions with short periods of steady cruise During the drive decelerate with the throttle fully closed for 5 seconds After about 3 5 miles 5 6 km the readiness code should switch from incomplete to complete Check the readiness codes screen for the Air Fuel Ratio A F Sensor in the DTCs MENU with the HDS e If the screen shows complete readiness is complete e If the screen shows not complete go to the next step Wednesday March 12 2008 2 05 58 AM Page 70 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 4 Check for a temporary DTC If there is no DTC the enable criteria was probably not met Select the DATA LIST Menu Check the ECT in the ALL DATA LIST with the HDS If the ECT is lower than 140 F 60 C run the engine until it is higher than 140 F 60 C then repeat the procedure AIR FUEL RATIO A F SENSOR HEATER MONITOR READINESS CODE NOTE All readiness codes are cleared when the battery is disconnected or when the is cleared with the HDS PROCEDURE 1 Start the engine and let it idle for 1 minute The readiness code should switch from incomplete to compl
14. ON II and accelerator pedal pressed PEDAL POSITION APP signal about 2 3 V SENSOR B With ignition switch ON 11 and accelerator pedal released ____ 2 X RED BLU APSA ACCELERATOR Detects APP sensor With ignition switch ON 11 and accelerator pedal pressed PEDAL POSITION APP signal about 4 5 V SENSOR A With ignition switch ON II and accelerator pedal released about 0 5 RED YEL AFS AIR FUEL Detects A F sensor RATIO A F SENSOR sensor 1 signal SENSOR 1 SIDE GRN RED MAP MANIFOLD Detects MAP sensor With ignition switch ON 11 about ABSOLUTE PRESSURE signat At idle about 1 0 V depending on engine speed SENSOR 2 s RED AFS AIR FUEL Detects A F sensor RATIO A F SENSOR sensor 1 signal SENSOR 1 SIDE 501821987 Fig 21 Connector Pin Voltage Chart 2 Of 2 ECM PCM INPUTS amp OUTPUTS AT CONNECTOR B 24P 1 2 3 4 5 VTC INJ4 INU3 INJ2 8 io n 18 15 ECT ALTL VTPSW ALTF MCS 17 18 19 20 21 IAT ALTC SEFD SEDF PCS Wire side of female terminals G01821988 Fig 22 Identifying ECM PCM Connector B 24P Terminals NOTE Standard battery voltage is 12 V Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX Terminal Wire color Terminal name
15. PCM Connector A 31P Terminals NOTE Standard battery voltage is 12 V Wire color RED BLU Terminal name Description Signal KS KNOCK SENSOR YEL BLK YEL BLK IGP2 POWER SOURCE __ IGP1 POWER SOURCE Detects knock sensor signal With engine knocking pulses Power source for ECM PCM circuit Power source for ECM PCM circuit With ignition switch ON 11 battery voltage With ignition switch OFF about 0 V With ignition switch ON II battery voltage With ignition switch OFF about 0 V BLK PG2 POWER GROUND Ground circuit for ECM PCM BLK PG1 POWER GROUND GRN Ground circuit for ECM PCM CMPB CAMSHAFT POSITION SENSOR BLU CKP CRANKSHAFT POSITION SENSOR Detects CMP sensor B signal With the ignition switch ON II about i Less than 1 0 V at all times Less than 1 0 V at all times With engine running pulses Detects CKP sensor sigrial With engine running pulses BRN YEL BRN YEL LG2 LOGIC GROUND LG1 LOGIC GROUND GRN BRN With the ignition switch ON II about 5 V Ground circuitforECM Less than 1 0 V at all times PCM Ground circuit for ECM PCM Less than 1 0 V at all times AFSHTC AIR FUEL RATIO A F SENSOR HEATER CONTROL __ IGPLS4 No 4 IGNITION COIL PULSE Drives A F sensor heater Drives No 4 ignition coil WHT BLU IGPLS3 No 3
16. They are DTC clear ECM PCM clear and CKP pattern clear DTC clear command erases all stored DTC codes freeze data and readiness codes This must be done with the HDS after reproducing the DTC during troubleshooting in this service manual ECM PCM clear command erases all stored DTC codes freeze data readiness codes and all specific data to correct the system except CKP pattern If the CKP pattern data in ECM PCM was cleared you must do the CKP pattern learn procedure The CKP pattern clear command erases only CKP pattern data This command is for the repair of a misfire or CKP sensor DTC CLEAR Do the DTC CLEAR in the CLEAR MENU with the HDS while the engine is stopped Tur the ignition switch OFF Tur the ignition switch ON II Wait for 30 seconds Turn the ignition switch OFF and disconnect the HDS from the DLC ECM PCM RESET This command clears stored specific data from each vehicle such as DTCs freeze data and readiness codes It does not clear CKP PATTERN data Do the ECM PCM RESET in the CLEAR MENU with the HDS while the engine is stopped Tur the ignition switch OFF Turn the ignition switch ON II Wait for 30 seconds Tur the ignition switch OFF and disconnect the HDS from the DLC Do the ECM PCM idle learn procedure see ECM PCM IDLE LEARN PROCEDURE CKP PATTERN CLEAR CKP PATTERN LEARN PROCEDURE Enable Criteria Wednesday March 12 2008 2 05 56 AM Page 5 2004 Acura TSX 2004 ENGINE PERFOR
17. the probe into the connector NOTE Do not puncture the insulation on a wire Punctures can cause poor or intermittent electrical connections MORIA RATTLE Tagan rr rn EIL aang SOO G01821972 Fig 7 Do Not Force The Probe Into The Connector ECM PCM UPDATING AND SUBSTITUTION FOR TESTING Special Tools Required Honda Interface Module HIM EQS05A35570 Use this procedure when you have to substitute a known good ECM PCM in a troubleshooting procedure Update the ECM PCM only if the ECM PCM does not have the latest software loaded NOTE Do not turn the ignition switch OFF while updating the ECM PCM If you turn the ignition switch OFF before completion the ECM PCM can be damaged HOW TO UPDATE THE ECM PCM NOTE To ensure the latest program is installed do an ECM PCM update whenever the ECM PCM is substituted or replaced e You can not update an ECM PCM with the program it already has It will only accept a new program Wednesday March 12 2008 2 05 57 AM Page 9 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX Before you update the ECM PCM make sure the vehicle s battery is fully charged To prevent ECM PCM damage do not operate anything electrical audio system brakes A C power windows moonroof door locks etc during the update e If you need to diagnose the Honda Interface Module HIM because the HIM s
18. toward downshift position 0 V in M position and shift lever in neutral position about 5 With ignition switch ON 11 and clutch pedal released about 0 V With ignition switch ON 1 and clutch pedal pressed battery voltage METINH METER DISPLAY INHIBIT SIGNAL DBWRLY THROTTLE ACTUATOR CONTROL MODULE RELAY Send inhibit signal Orives throttle actuator control module relay With ignition switch ON 11 battery voltage With ignition switch ON 0V Fig 28 ECM PCM Connector D 17P Pin Voltage Chart ECM PCM INPUTS amp OUTPUTS AT CONNECTOR 31P E 3 4 7 103 593 vecs 12 1 15 95 FANC FTP ELD gw 22 23 24 BKSW K LINE 101821996 17 IMO FPR 9 20 2 025 Wire side of female terminals Fig 29 Identifying ECM PCM Connector E 31P Terminals NOTE Standard battery voltage is 12 V Wednesday March 12 2008 2 05 57 AM Page 28 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX Terminal Wire color YEL BLK Terminal name SLS SHIFT LOCK SOLENOID RVS REVERSE LOCK SOLENOID VALVE BRN YEL 5 RED YEL LG3 LOGIC GROUND GRN BLK SG3 SENSOR GROUND Sensorground __ Less than 1 0 V times YEL GRN VCC3 SENSOR VOLTAGE Provides sensor voltage With ignition switch ON 11 about 5 V Description Tp Drives shift lock solenoid
19. 03 SWITCH Clutch pedal pressed closed Clutch pedal released open G01822034 Fig 66 Evaporative Emission EVAP System Wiring Diagram 6 Of 11 Wednesday March 12 2008 2 05 57 AM Page 63 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX To IMMOBILIZER UNIT RED i RED YEL GRN 2 WHT BLK AJF SENSOR SENSOR 1 BLK RED SECONDARY HO2S a SENSOR 2 SO2SHTC SEW BLU VEL ees sammes oe amn 28 JUNCTION CONNECTOR E2 aa LT Fi 515 VEL RED SHIFT LOCK SOLENOID ema SWITCH G01822035 Fig 67 Evaporative Emission EVAP System Wiring Diagram 7 Of 11 Wednesday March 12 2008 2 05 57 AM Page 64 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX ee ot 28 JUNCTION 28 JUNCTION CONNECTOR CONNECTOR GAUGE ASSEMBLY A Clutch pedal pressed closed Clutch pedal released open CLUTCH PEDAL POSITION SWITCH FTP SENSOR TGRN RED BLK RED 2 EVAP CANISTER VENT SHUT VALVE ere 28P JUNCTION CONNECTOR L Le 3 with Navigation System G01822036 Fig 68 Evaporative Emission EVAP System Wiring Diagram 8 Of 11 Wednesday March 12 2008 2 05 57 AM Page 65 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems
20. 2 05 57 AM Page 16 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX IGNITION COIL RELAY 16 COIL PGM FI MAIN RELAY 2 FUEL PUMP A C CLUTCH RELAY b LS BATTERY 1 RADIATOR FAN RELAY d Q IGNITION SWITCH 51 HOT in ON II and STARTIIII UNDER HOOD FUSE RELAY BOX STARTER CUT RELAY STCUT DNo 22 BATTERY 100A No 8 FI ECU 15 23 B IG MAIN 50 A F SENSOR RELAY LAF No 19 OPTION 40A Em No 13 HORN STOP 20A H UNDER DASH FUSE RELAY BOX 2 IG COIL 15A 19 FUEL PUMP 15 18 15A 30 A C 7 5 E15 ELD Arswrcnts E8 15A E12 FANC DNo 23 IGP 7 5A No 1 THROTTLE CLUTCH ACTUATOR CONTROL INTER LOCK 15A G01821979 Fig 14 ECM PCM Wiring Diagram 1 Of 5 Wednesday March 12 2008 2 05 57 AM Page 17 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX MAP SENSOR No 1 INJECTOR a ze Q 561 A24 9 No 2 INJECTOR No 3 INJECTOR mA 9 B3INJS rcs 06 Ee B21NJ4 562 23 9 IAT SENSOR ECT SENSOR 7 BARO SENSOR Built into the ECM PCM IAT B17 is 4 KNOCK SENSOR 9
21. 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX SPECIAL TOOLS _Ref No Tool Number Description A973X 041 XXXXX Vacuum Pump Gauge 0 30 in Hg 07JAZ 001000B Vacuum Pressure Gauge 0 4 in Hg 07SAZ 001000A Backprobe Set 07NAJ P07010A Pressure Gauge Adapter 07XAA 001010A Fuel Sender Wrench 8 07ZAJ S5A0100 Fuel Pressure Gauge Set 07ZAJ S7C0100 Fuel Hose Attachment 072AJ S7C0200 Fuel Joint Attachment 07ZAJ S5A0200 Hose Oil Pressure 9 1 07406 0020201 A T Pressure Hose 09 2 07406 0070300 A T Low Pressure Gauge W Panel 00 3 O7MAJ PY4011A A T Pressure Hose 2 210 mm 00 4 O7MAJ PY40120 A T Pressure Hose Adapter a 07406 004000A Fuel Pressure Gauge 501821966 9 L3 L 28 m o 23 M e ai Fig 1 Special Tools 1 Of 2 00 1 00 2 10 3 10 4 601821967 Fig 2 Special Tools 2 Of 2 GENERAL TROUBLESHOOTING INFORMATION Wednesday March 12 2008 2 06 18 AM Page 1 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX INTERMITTENT FAILURES The term intermittent failure means a system may have had a failure but it checks OK now If the malfunction indicator lamp MIL on the dash does not come on check for poor connections or loose pins at all connectors related to the circuit that you are troubleshooting OPENS amp SHORTS Op
22. 2010 Fig 42 Cutaway View Of Secondary Heated Oxygen Sensor Secondary HO2S ELECTRONIC THROTTLE CONTROL SYSTEM The throttle is electronically controlled by the electronic throttle control system Refer to the System Diagram to see the functional layout of the system Idle Control When the engine is idling the ECM PCM controls the throttle actuator to maintain the proper idle speed according to engine loads Acceleration Control When the accelerator pedal is pressed the ECM PCM opens the throttle valve depending on the accelerator pedal position APP sensor signal Cruise Control The ECM PCM controls the throttle actuator to maintain set speed when the cruise control is operating The throttle actuator takes the place of the cruise control actuator ACCELERATOR PEDAL POSITION APP SENSOR As the accelerator pedal position changes the sensor varies the signal voltage to the ECM PCM Wednesday March 12 2008 2 05 57 AM Page 40 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX APP SENSOR 101822011 Fig 43 Locating Accelerator Pedal Position APP Sensor Wednesday March 12 2008 2 05 57 AM Page 41 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL G01822012 Fig 44 Cutaway View Of Accelerator Pedal Position APP Sensor THROTTLE BODY The throttle body is a single barrel side draft type The lower portion of the throttle valve is hea
23. 7 Cooling System Malfunction m u P0133 61 P0133 Air Fuel Ratio A F Sensor Sensor 1 Response Malfunction P0134 41 lt Air Fuel Ratio A F Sensor Sensor 1 Heater System Malfunction P0135 41 Air Fue Ratio A F Sensor Sensor 1 Heater Circuit Malfunction P0137 63 Secondary Heated Oxygen Sensor Secondary HO2S Sensor 2 Circuit Low Voltage si P0138 63 Secondary Heated Oxygen Sensor Secondary HO2S Sensor 2 Circuit High Voltage P0139 63 Secondary Heated Oxygen Sensor Secondary HO2S Sensor 2 Slow Response P0141 65 Secondary Heated Oxygen Sensor Secondary HO2S Sensor 2 ees NOUS Heater Circuit Malfunction 0171 45 0172 45 Fuel Supply System Too Rich Throttle Position TP Sensor B Circuit Low Voltage _ Throttle Position TP Sensor Circuit High Voltage P0300 Random Misfire Detected some and some of P0301 and P0301 P0302 of P0302 P0303 P0303 P0304 P0304 0301 71 No 1 Cylinder Misfire P0302 72 No 2 Cylinder Misfire _ ON P0303 73 No 3 Cylinder Misfire P0304 74 No 4 Cylinder Misfire P0325 23 Knock Sensor Circuit Malfunction nexum P0335 4 E Crankshaft Position CKP Sensor No Signal me P0339 4 2 Crankshaft Position Sensor Circuit Intermittent Interruption ___ or Camshaft Position Sensor A No Signal Camshaft Position CMP Sensor and Crankshaft Position CKP Sensor Incorrect Ph
24. A T e 2 M T APP SENSOR 3 with Navigation System G01821982 Fig 17 ECM PCM Wiring Diagram 4 Of 5 Wednesday March 12 2008 2 05 57 AM Page 20 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 06 ATPP foam o C20 ATPN SHIFT SOLENOID VALVE A Q 00 C9 ATPD3 SHIFT SOLENOID VALVEB C18 ATPFWD TRANSMISSION C12 ATPRVS RANGE SWITCH 2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH A T CLUTCH ane CLUTCH TRANSMISSION FLUID SOLENOID VALVE A PRESSURE SWITCH m 5 A T CLUTCH C10 5 LSB C15 E FRESSURE ONTROL SOLENOID VALVE 8 A T CLUTCH On 02 SMODE PE ISOLENOID P 5 D3 SUP _ 4 il 5 SDN NM C19 f 2_ MAINSHAFT MODE SWITCH SPEED SENSOR PARK PIN SWITCH COUNTERSHAFT SPEED SENSOR To SHIFT LOCK SOLENOID 1 A T ECM PCM A en B ECM PCM D 31 A T 17 P 31 P 1121314151617 813 a 213 516 81812121 Geant A819107 231241 2528 1710 31 202 2011 ZA b TERMINAL LOCATIONS G01821983 Fig 18 ECM PCM Wiring Diagram 5 Of 5 ECM PCM INPUTS amp OUTPUTS AT CONNECTOR A 31P Wednesday March 12 2008 2 05 57 AM Page 21 G01821984 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 2004 Acura TSX Wire side of female terminals Fig 19 Identifying ECM
25. AG CMPB Q CMP SENSOR B 1 A T G01821980 Fig 15 ECM PCM Wiring Diagram 2 Of 5 Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 5 AFSHTC 10 PURGE VALVE 5 A31 AFS A28 9 EVAP CANISTER VENT SHUT VALVE A F SENSOR SENSOR 1 SHO2S E20 SO2SHTC E21 SECONDARY 02 ALTERNATOR SENSOR 2 CMP SENSOR A CMPA A19 A16 IGPLS1 VTC OIL CONTROL SOLENOID VALVE VTEC OIL PRESSURE SWITCH A14 IGPLS3 A13 IGPLS4 No 4 IGNITION COIL MCS B15 CONTI MOUNT SOLENOID VALVE G01821981 Fig 16 ECM PCM Wiring Diagram 3 Of 5 Wednesday March 12 2008 2 05 57 AM Page 19 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX no s v BRAKE PEDAL POSITION SWITCH FTP SENSOR E14 FTP 4 563 BKSW E22 1 BKSWNC D8 9 Ii __ NAVIGATION UNIT To IMOCD E27 IMMOBILIZER UNIT e 4 ril A24 WEN Q REVERSELOCK _ DATA LINK 16808 SOLENOID VALVE CONNECTOR M7 A14 K LINE PSPSW E17 9 PSP SWITCH GAUGE ASSEMBLY 9 B19 SEFD CANL E24 o B20 SEDF METINH D10 ACTUATOR APSA A26 9 THROTTLE TILE ACTUATO BODY 25 9 THRO CONTROL MODULE 1
26. EVAP canister The EVAP canister vent shut valve controls the venting of the EVAP canister Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL O RING 01822026 Fig 58 Cutaway View Of EVAP Canister Vent Shut Valve ELECTRONIC THROTTLE CONTROL SYSTEM DIAGRAM The electronic throttle control system consists of the throttle actuator throttle position TP sensor accelerator pedal position APP sensor throttle actuator control module and the ECM PCM The throttle is electronically controlled by this system Wednesday March 12 2008 2 05 57 AM Page 55 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX From THROTTLE YEL RED T RED BLU APP GRN WHT E SENSOR A VARIOUS THROTTLE YEL BLU SENSORS ACTUATOR RED YEL ARM GRN YEL APP SENSOR B TP SENSOR A B G01822027 Fig 59 Electronic Throttle Control System Diagram EVAPORATIVE EMISSION EVAP CONTROL DIAGRAM The EVAP controls minimize the amount of fuel vapor escaping to the atmosphere Vapor from the fuel tank is temporarily stored in the EVAP canister unit it can be purged from the canister into the engine and burned The EVAP canister is purged by drawing fresh air through it and into a port on the intake manifold The purging vacuum is controlled by the EVAP canister purge valve which operates whenever engine coolant temperature is
27. GE VALVE TAB NOTE Make sure the clip is installed with the tab facing towards the left side of the vehicle G01822000 Fig 32 Vacuum Hose Routing VACUUM DISTRIBUTION Wednesday March 12 2008 2 05 57 AM Page 30 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX ATMOSPHERE ATMOSPHERE 4 D AIR FUEL RATIO A F SENSOR SENSOR 1 2 SECONDARY HEATED OXYGEN SENSOR SECONDARY HO2S SENSOR 2 9 MANIFOLD ABSOLUTE PRESSURE MAP SENSOR ENGINE COOLANT TEMPERATURE ECT SENSOR INTAKE AIR TEMPERATURE IAT SENSOR CRANKSHAFT POSITION SENSOR KNOCK SENSOR CAMSHAFT POSITION CMP SENSOR B CAMSHAFT POSITION CMP SENSOR A 49 THROTTLE BODY INJECTOR 02 FUEL PRESSURE REGULATOR 19 FUEL FILTER i FUEL PUMP i FUEL TANK G01822001 Fig 33 Vacuum Distribution PGM FI SYSTEM AIR CLEANER i RESONATOR i POSITIVE CRANKCASE VENTILATION PCV VALVE 19 THREE WAY CATALYTIC CONVERTER EVAPORATIVE EMISSION EVAP CANISTER PURGE VALVE EVAPORATIVE EMISSION CANISTER EVAPORATIVE EMISSION EVAP CANISTER VENT SHUT VALVE FUEL TANK PRESSURE FTP SENSOR INTAKE AIR BYPASS CONTROL THERMAL VALVE 99 FUEL TANK VAPOR CONTROL VALVE ENGINE MOUNT CONTROL SOLENOID VALVE The Programmed Fuel Injection PGM FI system is a sequential multiport fuel injection system AIR CONDITIONING A C COM
28. IGNITION COIL PULSE BLU RED IGPLS2 No 2 IGNITION COIL PULSE YEL GRN BLK BLU BLU WHT Drives 3 ignition coil Drives No 2 ignition coil IGPLS1 No 1 IGNITION COIL PULSE NC COUNTERSHAFT SPEED SENSOR _ Drives No 1 ignition coil Detects countershaft speed sensor signal With fully warmed up engine running about 0 V With ignition switch ON II about 0 V With engine running pulses With ignition switch ON II about 0 V or about 5 V CMP A CAMSHAFT POSITION SENSOR A Detects CMP sensor A signal While driving about 2 5 V With engine running pulses With ignition switch ON 11 about 5 V G01821985 Fig 20 ECM PCM Connector A 31P Pin Voltage Chart 1 Of 2 Wednesday March 12 2008 2 05 57 AM Page 22 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX erminal Wire color Terminal name Description Signal number YEL BLU VCC2 SENSOR Provides sensor voltage With ignition switch ON 11 about 5 V VOLTAGE With ignition switch OFF ___ YEURED VCC1 SENSOR Provides sensor voltage With ignition switch ON 11 about 5 V VOLTAGE EA ES With ignition switch OFF about 0 V GRN YEL SG2 SENSOR Sensor ground Less than 1 0 V at all times un GROUND GRN WHT 561 SENSOR Sensor ground Less than 1 0 V at ail times GROUND me RED YEL APSB ACCELERATOR Detects APP sensor With ignition switch
29. INAL G01822004 Fig 36 Cutaway View Of Countershaft Speed Sensor CRANKSHAFT POSITION CKP SENSOR The CKP sensor detects crankshaft speed and is used by the ECM PCM to determine ignition timing and timing for fuel injection of each cylinder as well as detecting engine misfire Wednesday March 12 2008 2 05 57 AM Page 34 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL G01822005 Fig 37 Cutaway View Of Crankshaft Position CKP Sensor ENGINE COOLANT TEMPERATURE ECT SENSOR The ECT sensor is a temperature dependent resistor thermistor The resistance of the thermistor decreases as the engine coolant temperature increases Wednesday March 12 2008 2 05 57 AM Page 35 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL THERMISTOR 101822006 Fig 38 Cutaway View Of Engine Coolant Temperature ECT Sensor IGNITION TIMING CONTROL The ECM PCM contains the memory for basic ignition timing at various engine speeds and manifold absolute pressure It also adjusts the timing according to engine coolant temperature and intake air temperature INJECTOR TIMING amp DURATION The ECM PCM contains the memory for basic discharge duration at various engine speeds and manifold pressures The basic discharge duration after being read out from the memory 15 further modified by signals sent from various sensors to obtain the final discharge dura
30. Intake Air System Leak Detected P2422 117 Evaporative Emission EVAP Canister Vent Shut Valve Stuck Closed M Malfunction P2552 40 Throttle Actuator Control Module Relay Malfunction P2646 22 VTEC Oil Pressure Swi tch Circuit Low Voltage LL VTEC Oil Pressure Switch Circuit High Voltage P2A00 61 P2A00 VTEC So Solenoid Valve Circuit Low Voltag 00073 126 FCAN Malfunction Bus Off U0107 30 _ Lost Communication With Throttle Actuator Control Module 00122 126 ee FCAN Malfunction VSA ECM PCM 0155 126 Malfunction Gauge Control Module ECM PCM The D indicator and MIL may come on simultaneously These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS m A T 3 4 With Navigation System G01821976 Fig 11 DTC Troubleshooting Index 3 Of 3 SYMPTOM TROUBLESHOOTING INDEX When the vehicle has one of these symptoms check for a diagnostic trouble code DTC with the scan tool If there is no DTC do the diagnostic procedure for the symptom in the sequence listed until you find the cause Wednesday March 12 2008 2 05 57 AM Page 14 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX Engine will not start MIL works OK no DTCs set Engine will not start MIL comes on and stays on or never comes on at all no DTCs set Also check Symptom Diagnostic procedure Test
31. MANCE Fuel amp Emissions Systems TSX ECT at 176 F 80 C or higher Procedure Do PATTERN CLEAR in the CLEAR MENU with the HDS while the engine is stopped Turn the ignition OFF Turn the ignition ON and wait for 30 seconds Test drive the vehicle on a level road Decelerate with the throttle fully closed from engine speed of 2 500 RPM to 1 000 RPM with the A T in 2 position or the M T in 2nd or 3rd gear 5 Stop the vehicle Do not turn the ignition off Select the ALL DATA LIST in the DATA LIST MENU of the HDS Check the status of PULSER F B LEARN If it is set to NG the enable criteria was probably not met repeat the procedure from the beginning HOW TO END A TROUBLESHOOTING SESSION REQUIRED AFTER ANY TROUBLESHOOTING Dothe ECM PCM RESET in the CLEAR MENU with the HDS Do the ECM PCM idle learn procedure see ECM PCM IDLE LEARN PROCEDURE Tur the ignition switch OFF Disconnect the HDS from the DLC NOTE The is part of the immobilizer system If you replace the ECM PCM it will have a different immobilizer code In order for the engine to start you must rewrite the immobilizer code with the HDS HOW TO REMOVE THE ECM PCM FOR TESTING If DTC troubleshooting requires voltage or resistance checks at the ECM PCM connectors remove the ECM PCM and test it 1 Jump the SCS line with the HDS 2 Remove the center lower covers A Wednesday March 12 2008 2 05 57
32. PRESSOR CLUTCH RELAY When the ECM PCM receives a demand for cooling from the A C system it delays the compressor from being Wednesday March 12 2008 2 05 57 AM Page 31 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX energized and enriches the mixture to assure smooth transition to the A C mode AIR FUEL RATIO A F SENSOR The A F Sensor operates over a wide air fuel range The A F Sensor is installed upstream of the TWC and sends signals to the ECM PCM which varies the duration of fuel injection accordingly SENSOR ZIRCONIA TERMINALS ELEMENT HEATER TERMINALS 101822002 Fig 34 Identifying Air Fuel Ratio A F Sensor BAROMETRIC PRESSURE BARO SENSOR The BARO sensor is inside the ECM PCM It converts atmospheric pressure into a voltage signal that modifies the basic duration of the fuel injection discharge CAMSHAFT POSITION CMP SENSOR B CMP sensor B detects the position of the No 1 cylinder as a reference for sequential fuel injection to each cylinder Wednesday March 12 2008 2 05 57 AM Page 32 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL MAGNET G01822003 Fig 35 Cutaway View Of Camshaft Position CMP Sensor B COUNTERSHAFT SPEED SENSOR This sensor detects countershaft speed Wednesday March 12 2008 2 05 57 AM Page 33 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX MAGNET TERM
33. T FRONT OF VEHICLE G01822023 Fig 55 Cutaway View Of Three Way Catalytic Converter TWC POSITIVE CRANKCASE VENTILATION PCV SYSTEM The PCV valve prevents blow by gasses from escaping into the atmosphere by venting them into the intake manifold Wednesday March 12 2008 2 05 57 AM Page 52 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX 1277 PIPE MANIFOLD lt BLOW BY VAPOR C FRESH AIR G01822024 Fig 56 Identifying Positive Crankcase Ventilation PCV System EVAPORATIVE EMISSION EVAP CONTROL SYSTEM Refer to the System Diagram to see the functional layout of the system EVAP Canister The EVAP canister temporarily stores fuel vapor from the fuel tank until it can be purged from the EVAP canister into the engine and burned EVAP Canister Purge Valve Wednesday March 12 2008 2 05 57 AM Page 53 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX When the engine coolant temperature is below 131 F 55 C the ECM PCM turns off the EVAP canister purge valve which cuts vacuum to the EVAP canister Fuel Tank Pressure FTP Sensor The FTP sensor converts fuel tank absolute pressure into an electrical input to the ECM PCM during the EVAP leak check SENSOR UNIT TERMINAL 101822025 Fig 57 Cutaway View Of Fuel Tank Pressure FTP Sensor EVAP Canister Vent Shut Valve The EVAP canister vent shut valve is on the
34. above 131 F 55 C Wednesday March 12 2008 2 05 57 AM Page 56 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX YEL GRN LT GRN GRN BLK LT GRN RED EVAP CANISTER VENT SHUT FRESH VALVE AIR HOSE SENSORS mi ATMOSPHERE ATMOSPHERE FUEL FILLER E VAPOR RECIRCULATION SENSOR TUBE FUEL TANK VAPOR y CONTROL VALVE 3 CANISTER aN BLK qx FUEL FILLER ACG RED 15A fuse EVAP CANISTER PURGE VALVE FUEL TANK VAPOR RECIRCULATION TUBE 01822028 Fig 60 Evaporative Emission EVAP System Schematic Wednesday March 12 2008 2 05 57 AM Page 57 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX ECM PCM 24P JUNCTION CONNECTOR 24122 8 0121 YEL BLK YEL BLK 1 3 2 No 1 INJECTOR YEL BLK enun L3 21 YEL BLK 1 No 3 INJECTOR 1 No 4 INJECTOR YEL BLK GRN BRN YEL CMP SENSOR B YEL BLK BLU BRN YEL CKP SENSOR G01822029 Fig 61 Evaporative Emission EVAP System Wiring Diagram 1 Of 11 Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX BLU BLK 1 EH BRN YEL BRN YEL VTEC SOLENOID VALVE BLU BLK MAP SENSOR 24P JUNCTION CONN IECTOR m 1 RED BLU KNOCK SENSOR
35. ase Detected EE Camshaft Position CMP Sensor A Intermittent Interruption P0365 8 gt Camshaft Position CMP Sensor No Signal __ ON P0369 8 Camshaft Position CMP Sensor intermittent Interruption ON Catalyst System Efficiency Below Threshold ON P0442 90 ____ Evaporative Emission System Small Leak Detected P0443 92 Evaporative Emission EVAP Control System Canister Purge Valve Circuit Malfunction 1 These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS 01821974 Fig 9 Troubleshooting Index 1 Of 3 Wednesday March 12 2008 2 05 57 AM Page 12 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX DTC Temporary Detection Item MIL MIL indication P0451 91 P0451 Evaporative Emission Control System Fuel Tank Pressure FTP Sensor Range Performance Problem P0452 91 P0452 Evaporative Emission Control System Fuel Tank Pressure PG Sensor Circuit Low Voltage E P0453 91 P0453 Evaporative Emission Control System Fuel Tank Pressure FTP Sensor Circuit High Voltage P0456 Evaporative Emission System Very Small Leak Detected 0456 90 P04 P0457 90 P0457 Evaporative Emission System Leak Detected Fuel Cap Loose or Missing P0496 92 __ 496 _ Evaporative Emission System High Purge Flow P0497 90 Evaporative Emission System Low Purge Flow P0498 117 Evaporative Em
36. be finished To check if the readiness codes are set to complete turn the ignition switch ON but do not start the engine The MIL will come on for 15 20 seconds If it then goes off the readiness codes are complete If it flashes five Wednesday March 12 2008 2 05 57 AM Page 38 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX times one or more readiness codes are not complete To set each code drive the vehicle or run the engine as described in the procedures in this section see HOW TO SET READINESS CODES MANIFOLD ABSOLUTE PRESSURE MAP SENSOR The MAP sensor converts manifold absolute pressure into electrical signals to the ECM PCM SENSOR UNIT TERMINAL G01822009 Fig 41 Cutaway View Of Manifold Absolute Pressure MAP Sensor SECONDARY HEATED OXYGEN SENSOR SECONDARY HO2S The secondary HO2S detects the oxygen content in the exhaust gas downstream of the three way catalytic converter TWC and sends signals to the ECM PCM which varies the duration of fuel injection accordingly To stabilize its output the sensor has an internal heater The ECM PCM compares the HO2S output with the A F sensor output to determine catalyst efficiency The secondary HO2S is located on the TWC Wednesday March 12 2008 2 05 57 AM Page 39 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX SENSOR MINALS ZIRCONIA ELEMENT HEATER HEATER TERMINALS G0182
37. d PSPSW POWER STEERING Detects PSP switch signal PRESSURE SWITCH At idle with steering wheel straight ahead 0 V At idle with steering wheel at full lock battery SIGNAL IMO FPR IMMOBILIZER FUEL PUMP RELAY GRN YEL Drives PGM FI main relay 2 FUEL PUMP RED _ CLUTCH RELAY Drives clutch relay LT GRN RED VSV EVAPORATIVE EMISSION EVAP CANISTER VENT SHUT VALVE Drives EVAP canister vent shut valve voltage a 0 V for 2 seconds after turning ignition switch ON Il then battery voltage With compressor ON about 0 V With compressor OFF battery voltage With ignition switch ON 11 battery voltage SHO2S SECONDARY HEATED OXYGEN SENSOR SECONDAY 25 E SENSOR 2 21 BLKAWHT SO2SHTC SECONDARY HEATED OXYGEN SENSOR ISECONDAY HO2S HEATER CONTROL WHT RED 1 AT 2 601821997 Detects secondary HO2S sensor 2 signal Drives secondary HO2S heater With throttie fully closed at idle and fully warmed up engine above 0 6 V With throttle quickly closed below 0 4 V With ignition switch ON It battery voltage With fully warmed up engine running duty controlled Fig 30 ECM PCM Connector E 31P Pin Voltage Chart 1 Of 2 Terminal Wire color Terminal name number Description Signal 22 WHT BLK BKSW BRAKE PEDAL CANL CAN COMMUNICATION SIGNAL LOW POSITION SWITCH
38. en and Short are common electrical terms An open is a break in a wire or at a connection A short is an accidental connection of a wire to ground or to another wire In simple electronics this usually means something won t work at all With complex electronics such as ECMs and PCMs this can sometimes mean something works but not the way it s supposed to HOW TO USE THE HDS HONDA DIAGNOSTIC SYSTEM If the MIL Malfunction Indicator Lamp has come on 1 Start the engine and check the MIL NOTE If the ignition switch is turned ON 1 and the engine is not started the MIL will stay on for 15 20 seconds see HOW TO SET READINESS CODES Wednesday March 12 2008 2 05 56 AM Page 2 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX b 6 7 4 8 EQ H G01821968 Fig 3 Identifying MIL Malfunction Indicator Lamp 2 Ifthe MIL stays on connect the HDS to the data link connector DLC A located under the driver s side of the dashboard Wednesday March 12 2008 2 05 56 AM Page 3 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX G01821969 Fig 4 Connecting The HDS To The Data Link Connector DLC Located Under The Driver s Side Of The Dashboard 3 Turn the ignition switch ON ID 4 Check the diagnostic trouble code DTC and note it Also check the freeze data Refer to the DTC Troubleshooting Index and begin the a
39. ete Ifthe readiness code is still not set to complete check for a temporary DTC If there is DTC repeat the procedure MISFIRE MONITOR amp READINESS CODE This readiness code is always set to available because misfiring is continuously monitored Monitoring pauses and the misfire counter resets if the vehicle is driven over a rough road Monitoring also pauses and the misfire counter holds at its current value if the throttle position changes more than a predetermined value or if driving conditions fall outside the range of any related enable criteria FUEL SYSTEM MONITOR amp READINESS CODE e This readiness code is always set to available because the fuel system is continuously monitored during closed loop operation e Monitoring pauses when the catalytic converter EVAP control system and A F sensor monitors are active e Monitoring also pauses when any related enable criteria are not being met Monitoring resumes when the enable criteria is again being met COMPREHENSIVE COMPONENT MONITOR amp READINESS CODE This readiness code is always set to available because the comprehensive component monitor is continuously running whenever the engine is cranking or running Wednesday March 12 2008 2 05 58 AM Page 71
40. gnores that signal and assumes a preprogrammed value for the sensor that allows the engine to continue to run BACK UP FUNCTION When an abnormality occurs in the the injectors are controlled by a back up circuit independent of the system to permit minimal driving SELF DIAGNOSIS When an abnormality occurs in the signal from a sensor the ECM PCM supplies ground for the malfunction indicator lamp MIL and stores the diagnostic trouble code DTC in erasable memory When the ignition is first turned on the ECM PCM supplies ground to the MIL for 15 to 20 seconds to check the MIL bulb condition If all readiness code are not set the MIL will flash five times If readiness codes are set to complete the MIL will go out TWO DRIVING CYCLE DETECTION METHOD To prevent false indications the two driving cycle detection method is used for some self diagnostic functions When an abnormality occurs the ECM PCM stores it in its memory When the same abnormality recurs after the ignition switch is turned OFF and ON II again the ECM PCM turns on the MIL SELF SHUT DOWN MODE SSD After the ignition switch is turned off the ECM PCM stays ON up to 15 minutes If the ECM PCM connector is disconnected during this mode the ECM PCM may be damaged To cancel this mode disconnect the negative cable from the battery or jump the SCS line with the HDS after the key is turned off ECM PCM ELECTRICAL CONNECTIONS Wednesday March 12 2008
41. h short periods of steady cruise After about 5 miles 8 km the readiness code should switch to completed Ifthe readiness code is still not set to complete check for a temporary DTC with the HDS If there is no DTC one or more of the enable criteria were probably not met repeat the procedure EVAPORATIVE EMISSIONS EVAP CONTROL SYSTEM MONITOR amp READINESS CODE Wednesday March 12 2008 2 05 58 AM Page 69 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX NOTE All readiness codes are cleared when the battery is disconnected or when the 1 cleared with the HDS ENABLE CRITERIA Battery voltage is higher than 10 5 V Engine at idle ECT sensor between 176 F 80 C and 212 F 100 MAP sensor less than 46 6 kPa 350 mm Hg 14 in Hg Vehicle speed 0 mph 0 km h IAT sensor between 32 F 0 C and 212 F 100 C PROCEDURE 1 Connect the HDS to the vehicle s data link connector DLC Start the engine Select EVAP TEST the INSPECTION MENU with the HDS then select the FUNCTION TEST in the EVAP TEST MENU e If the functions are normal readiness is complete e If the functions are not normal go to the next step Ifthe readiness code is still not set to complete check a temporary DTC If there is DTC one or more of the enable criteria were probably not met repeat the procedure AIR FUEL RATIO A F SENSOR MONITOR amp READINESS CODE
42. ing ECM PCM Connector D 17 Terminals NOTE Standard battery voltage is 12 V Wednesday March 12 2008 2 05 57 AM Page 27 number 2 BRN WHT BLU WHT Wire color Terminal name S MODE SEQUENTIAL SPORT SHIFT MODE SUP UP SHIFT SWITCH ATPR TRANSMISSION RANGE SWITCH R POSITION signal 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX Description Detects sequential sportshift mode switch Detects upshift switch signal switch R position signal M position 0 V In other than M position about 5 V In M position and shift lever pushed toward upshift position 0 V M position and shift lever in neutral position aboutbV In position about 0 V In any other position about 5 V BLU BLK ATPP TRANSMISSION RANGE SWITCH PARK POSITION Detects transmission range Switch Park position signal In Park position about O V In any other position about 5 V BRN BKSWNC BRAKE PEDAL POSITION SWITCH Detects brake pedal position switch signal With ignition switch ON 11 and brake pedal released battery voltage With ignition switch ON 11 and brake pedal pressed about 0 V SDN DOWN SHIFT SWITCH 1 2 G01821995 CRMTCLS CRUISE CLUTCH PEDAL POSITION SIGNAL Detects downshift switch signal Detects cruise clutch pedal position switch signal In M position and shift lever pushed
43. ission System Vent Shut Valve Circuit Low Voltage P0499 117 _ ___ Evaporative Emission System Vent Shut Valve Circuit High Voltage P0506 14 P0506 Idle Control System RPM Lower Than Expected Idle Air Control Systern RPM Higher Than Expected P0563 34 Engine Control Module ECM Powertrain Control Module PCM ______ Power Source Circuit Unexpected Voltage P0603 131 ECM PCM Internal Control Module Keep Alive Memory KAM Error ON P0606 0 ECM PCM Processor Malfunction ON ECM PCM Power Control Circuit Malfunction P0700 70 77 Automatic Transaxle System Malfunction P0700 Automatic Transaxle System Malfunction Countershaft Speed Sensor Circuit Malfunction Manifold Absolute Pressure MAP Sensor Circuit Lower Than Expected P0720 122 P1128 5 P1129 5 Manifold Absolute Pressure MAP Sensor Circuit Higher Than Expected P1157 48 Air Fuel Ratio A F Sensor Sensor 1 Line High Voltage P1297 20 Electric Load Detector ELD Circuit Low Voltage 25 P1298 20 _ Electric Load Detector ELD Circuit High Voltage P1454 91 Fuel Tank Pressure FTP Sensor Range Performance Problem Throttle Valve Default Position Spring Performance Problem P1684 40 Throttle Valve Return Spring Performance Problem throttle Actuator System Malfunction P2108 40 Throttle Actuator Control Module Problem P2118 40 ____ Actuator Current Range Performance Problem
44. it then goes off the readiness codes are complete If it flashes five times one or more readiness codes are not set to complete To set readiness codes from incomplete to complete do the procedure for the appropriate code To check the status of a specific DTC system check the OBD status in the DTC MENU with the HDS see OBD Status This screen displays the code the current data list of the enable criteria and the status of the readiness testing Catalytic Converter Monitor amp Readiness Code NOTE Do not turn the ignition switch off during the procedure All readiness codes are cleared when the battery is disconnected or when the ECM PCM is cleared with the HDS Low ambient temperatures or excessive stop and go traffic may increase the drive time needed to switch the readiness code from incomplete to complete The readiness code will not switch to complete until all the enable criteria are met If a fault in the secondary HO2S system caused the MIL to come on the readiness code cannot be set to complete until you correct the fault ENABLE CRITERIA e ECT at 158 F 70 C or higher e Intake air temperature IAT at 20 F 7 C or higher e Vehicle speed sensor VSS reads more than 25 mph 40 km h PROCEDURE Connect the HDS to the vehicle s data link connector DLC and bring up the READINESS CODEs screen for Catalyst in the DTCs MENU Start the engine Test drive the vehicle under stop and go conditions wit
45. loss the intake valve is closed quickly This helps the entry of fuel air mixture by the charging effect and maximizes engine power G01822015 Fig 47 VTEC VTC Description VTC system The VTC system makes continuous intake valve timing changes based on operating conditions Intake valve timing is optimized to allow the engine to produce maximum power Cam angle is advanced to obtain the EGR effect and reduce pumping loss The intake valve is closed quickly to reduce the entry of the air fuel mixture into the intake port and improve the charging effect The system reduces the cam advance at idle stabilizes combustion and reduces engine speed Wednesday March 12 2008 2 05 57 AM Page 44 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX If a malfunction occurs the VTC system control is disabled and the valve timing is fixed at the fully retarded position 101822016 Fig 48 VTC System Intake Valve Timing Chart Wednesday March 12 2008 2 05 57 AM Page 45 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX MAXIMUM VTC ADVANCE 25 SHORT OVERLAP 1 1 4 LONG OVERLAP G01822017 Fig 49 VTC System Intake Valve Timing VTEC system The VTEC system changes the cam profile to correspond to the engine speed It maximizes torque at low engine speed and output at high engine speed The low lift cam is used at low e
46. ngine speeds and the high lift cam is used at high engine speeds Wednesday March 12 2008 2 05 57 AM Page 46 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX LOW SPEED VALVE TIMING G01822018 Fig 50 Low Speed Valve Timing HIGH SPEED VALVE TIMING 101822019 Wednesday March 12 2008 2 05 57 Page 47 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX Fig 51 High Speed Valve Timing VTEC VTC BLU YEL e From No 18 me ACG 15A fuse INTAKE CAMSHAFT 77 BRN YEL BLU WHT various CMP SENSOR A BLU WHT SENSORS GRN YEL VTC BLU BLK ADVANCE CHAMBER VTC ACTUATOR p BLK VANE zA VTC OIL CONTROL SOLENOID VALVE BLK HOUSING BRN YEL VTC OIL PRESSURE SWITCH SOLE ENOID VALVE t VTC STRAINER From OIL PUMP 601822020 Fig 52 VTEC VTC System Wiring Diagram CAMSHAFT POSITION CMP SENSOR A This sensor detects camshaft angle position for the VTC system Wednesday March 12 2008 2 05 57 AM Page 48 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL MAGNET G01822021 Fig 53 Cutaway View Of Camshaft Position CMP Sensor A IDLE CONTROL SYSTEM When the engine is cold the A C compressor is on the transmission is in gear the brake pedal is pressed the power steering load is high or the alternator is charging the
47. on or D D3 and M position in 2nd 3rd gears about 0 Drives shift solenoid valve D Drives shift solenoid valve BLU YEL LSC A T CLUTCH PRESSURE CONTROL SOLENOID VALVE RED BLU WHT ATPD3 TRANSMISSION RANGE SWITCH D3 POSITION OP3SW 3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH Drivers A T clutch pressure With the ignition switch ON 11 duty controlled control solenoid valve C Detects transmission range switch D3 position signal input Detects 3rd clutch transmission fluid pressure switch signal output In D3 position about 0 V In any other position about 5 V With ignition switch ON II about 5 V With 3rd clutch pressure 0 V RED WHT BLU YEL 1 P PINSW PARK SWITCH ATPRVS TRANSMISSION RANGE SWITCH R POSITION BLU RED OP2SW 2ND CLUTCH RED YEL 1 601821991 TRANSMISSION FLUID PRESSURE SWITCH _ Detects park pin switch signal _ Detects transmission range switch R position signal o Detects 2nd clutch With ignition switch ON about 5 V transmission fluid pressure With 2nd clutch pressure 0 V Switch signal input With park pin switch ON 11 about 0 V With park pin switch OFF about 5 V R position about 0 V In any other position about 5 V ATFT ATF TEMPERATURE SENSOR Detects ATF temperature With ignition switch ON ll about 0 2 V 3 V sen
48. ons Systems TSX Terminal name T RED BLK LSA A T CLUTCH PRESSURE CONTROL SOLENOID VALVE A _ SHC SHIFT SOLENOID _ VALVE C SHE SHIFT SOLENOID VALVE E Description Signal Drives A T clutch pressure With ignition switch ON II duty controlled control solenoid valve A Drives shift solenoid valve C With engine running in Neutral and R position or in D D3 and M position in 1st 3rd and 5th gears battery voltage With engine running in Park R position or D D3 _____ and position in 2nd 4th gears about 0 V Drives shift solenoid valve With engine running in Park position battery voltage With engine running in Neutral position or in D D3 and M position about 0 V GRN WHT GRN RED BLU BLK SHB SHIFT SOLENOID VALVE B SHD SHIFT SOLENOID VALVE D SHA SHIFT SOLENOID VALVE A Drives shift solenoid valve B With engine running in Park R Neutral or D D3 and M position in 1st 2nd gears battery voltage With engine running in R or D D3 and M position in 3rd 4th 5th gears about V With engine running 2 or D and M position in 2nd 5rd gears battery voltage With engine running in Park R Neutral or D D3 and M position in 1st 3rd 4th gears about 0 V With engine running in R or D D3 and M position in 1st 4th 5th gears battery voltage With engine running in Park Neutral and R positi
49. osition switch signal K LINE Sends and receives scan ___ tool signals Detects brake With brake pedal released about 0 _With brake pedal pressed battery voltage _ _ Sends the communication signal With ignition switch ON II pulses or battery voltage With ignition switch ON 1 pulses NEP ENGINE SPEED PULSE VSSOUT VEHICLE SPEED SENSOR OUTPUT SIGNAL IMOCD IMMOBILIZER CODE BLU WHT RED BLU Outputs engine speed pulse Sends vehicle speed sensor signal Not functional on U S and Canada models Depending on vehicle speed pulses With ignition switch ON 11 battery voltage _ Detects immobilizer signal SCS SERVICE CHECK SIGNAL RED WHT WEN WRITE ENABLE SIGNAL G01821999 Detects service check signal Detects write enable signal With the service check signal shorted using HDS about 0 V With the service check signal open about 5 V With ignition switch ON 11 about 0 V Fig 34 ECM PCM Connector E 31P Pin Voltage Chart 2 Of 2 Wednesday March 12 2008 2 0 Page 29 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX VACUUM HOSE ROUTING To EVAPORATIVE EMISSION CANISTER INTAKE AIR BYPASS CONTROL THERMAL VALVE OTE When installing the tube the mar onhe a to face toward the le FRONT OF side of the vehicle A EVAPORATIVE ENISSION EVAP CANISTER PUR
50. ppropriate troubleshooting procedure NOTE e Freeze data indicates the engine conditions when the first malfunction misfire or fuel trim malfunction was detected e The HDS can read the DTC freeze data current data and other engine control module ECM powertrain control module PCM data For specific operations refer to the user s manual that came with the HDS 5 If no DTC are found go to MIL troubleshooting see MIL CIRCUIT TROUBLESHOOTING If the MIL did not stay on Wednesday March 12 2008 2 05 56 AM 4 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX If the MIL did not stay on but there is a driveability problem refer to the Symptom Troubleshooting Index in this section If you can t duplicate the DTC Some of the troubleshooting requires you to reset the ECM PCM and try to duplicate the DTC If the problem is intermittent and you can t duplicate the code do not continue through the procedure To do so will only result in confusion and possibly a needlessly replaced ECM PCM HDS CLEAR COMMAND The stores various specific data to correct the system even when there is no electrical power such the battery negative terminal or No 8 FI ECU ECM PCM 15A fuse are disconnected Stored data based on failed parts should be cleared by using the CLEAR COMMAND of the HDS if parts are replaced The HDS has three kinds of clear commands to meet the purpose
51. red 3 light came on or was flashing during the update leave the ignition switch in the ON Il position when you disconnect the HIM from the data link connector DLC This will prevent ECM PCM damage 1 Turn the ignition switch ON II Do not start the engine 2 Connect the HDS or the Honda Interface Module HIM to the data link connector DLC A located under the driver s side of the dashboard G01821973 Fig 8 Connecting The HDS Or HIM To The Data Link Connector DLC Located Under The Driver s Side Of The Dashboard Wednesday March 12 2008 2 05 57 AM 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX Do ECM PCM update procedure as described on the HIM label and in the ECM PCM update system Do the ECM PCM idle learn procedure see ECM PCM IDLE LEARN PROCEDURE Do the pattern learn procedure if you did the troubleshooting for DTC P0300 P0301 P0302 P0303 P0304 P0335 or P0339 HOW TO SUBSTITUTE THE ECM PCM Remove the ECM PCM form the vehicle Install a known good ECM PCM Rewrite the immobilizer code with the ECM PCM replacement procedure in the HDS it allows you to start the engine After completing your tests install the original ECM PCM and rewrite the immobilizer code with the ECM PCM replacement procedure in the HDS OBD STATUS The OBD status shows the current system status of each DTC and all of the parameters This function is used to
52. see if the technician s repair was successfully finished The results of diagnostic tests for the DTC are displayed as PASSED On board diagnosis is successfully finished FAILED On board diagnosis has finished but failed EXECUTING The vehicle is in enable criteria conditions for the DTC and the on board diagnosis is running NOT COMPLETED The on board diagnosis was running but is out of the enable conditions of the DTC OUT of COND The vehicle has stayed out of the enable conditions of the DTC DTC TROUBLESHOOTING INDEX Wednesday March 12 2008 2 05 57 AM Page 11 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX DTC Temporary Detection Item MIL indication P0010 56 Malfunction P0011 56 Manifold Absolute Pressure MAP Sensor Circuit Low Voltage ON Manifold Absolute Pressure MAP Sensor Circuit High ON P0112 10 Intake Air Temperature IAT Sensor Circuit Low Voltage MM Intake Air Temperature IAT Sensor Circuit High Voltage P0116 86 Engine Coolant Temperature ECT Sensor Range Performance Problem P0117 6 _ Engine Coolant Temperature ECT Circuit Low Voltage ____ Engine Coolant Temperature ECT Circuit High Voltage P0122 7 Throttle Position TP Sensor A Circuit Low Voltage P012307 __ Throttle Position TP Sensor A Circuit High Voltage P0125 86 Engine Coolant Temperature ECT Sensor Malfunction Slow Response P0128 8
53. sor signal input depending on ATF temperature Fig 25 ECM PCM Connector C 22P Pin Voltage Chart 1 Of 2 Wire color BRN WHT BLU YEL WHT RED RED BLK 1 AT 601821993 Terminal name LSB A T CLUTCH PRESSURE CONTROL SOLENOID VALVE Description Drives A T clutch pressure control solenoid valve With ignition switch Il duty controlled ATPD TRANSMISSION RANGE SWITCH D POSITION In D position about 0 V In any other position about 5V Detects transmission range switch D position signal ATPFWD TRANSMISSION RANGE SWITCH D D3 POSITION NM MAINSHAFT SPEED SENSOR ATPN TRANSMISSION RANGE SWITCH NEUTRAL POSITION Detects transmission range switch D D3 position signal In D D3 position about 0 V In any other position about 5 V Detects mainshaft speed sensor signal Detects transmition range switch Neutral position signal With ignition switch ON 1 about 0 V or about 5 V With engine running in N position about 2 5 V In Neutral position about 0 V In any other position about 5 V Fig 26 ECM PCM Connector C 22P Pin Voltage Chart 2 Of 2 ECM PCM INPUTS amp OUTPUTS AT CONNECTOR D 17P Wednesday March 12 2008 2 05 57 AM Page 26 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX ie BA Wire side of female terminals 01821994 Fig 27 Identify
54. ted by engine coolant from the cylinder head to prevent icing of the throttle plate Wednesday March 12 2008 2 05 57 AM Page 42 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX THROTTLE VALVE THROTTLE POSITION SENSOR and THROTTLE ACTUATOR G01822013 Fig 45 Identifying Throttle Body Components VTEC VTC The i VTEC has a VTC Variable Valve Timing Control mechanism on the intake camshaft in addition to the usual VTEC This mechanism improves fuel efficiency and reduces exhaust emissions at all levels of engine speed vehicle speed and engine load The VTEC mechanism changes the valve lift and timing by using more than one cam profile The VTC changes the phase of the intake camshaft via oil pressure It changes the intake valve timing continuously Wednesday March 12 2008 2 05 57 AM Page 43 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX LOW SPEED CAM ENGINE LOAD LOW LOW 4 ENGINE SPEED 601822014 Fig 46 Operation Chart Driving Condition ___ VTC Control Description QD Light load Base Position For stable combustion the cam angle is retarded and s 46 3 ee reduces the entry of exhaust gas into the cylinder Medium high load Advance Control Cam phase angle is controlled to optimize valve timing improving fuel efficiency and reducing emmission 3 High speed Advance Base Position To reduce the pumping
55. the battery Test the starter Check the fuel pressure Troubleshoot the fuel pump circuit Troubleshoot the MIL circuit Engine will not start immobilizer indicator stays or flashes Hard starting MIL works OK no DTCs set Troubleshoot the immobilizer system Low compression No ignition spark Intake air leaks Locked up engine Broken cam chain Contaminated fuel battery Check the fuel pressure Test the throttle body Cold fast idle too low MIL works OK no DTCs set Do the ECM PCM idle learn procedure Check the idle speed Low compression Intake air leaks Contaminated fuel Weak spark Cold fast idle too high MIL works OK no DTCs set Do the ECM PCM idle learn procedure Check the idle speed Inspect adjust the throttle cable Idle speed fluctuates MIL works OK no DTCs set After warming up idle speed is below specification with no load MIL works OK no DTCs set After warming up idle speed is above specification with no load MIL works OK no DTCs set Low power MIL works OK no DTCs set M 2 9 9 AON Do the ECM PCM idle learn procedure Check the idle speed Inspect adjust the throttle cable Test the throttle body Troubleshoot the alternator FR signal circuit Test the throttle body Inspect adjust the throttle cable Troubleshoot the alternator FR signal circuit
56. tion By monitoring long term fuel trim the ECM PCM detects long term malfunctions in the fuel system and sets a diagnostic trouble code DTC INTAKE AIR TEMPERATURE IAT SENSOR The IAT sensor is a temperature dependent resistor thermistor The resistance of the thermistor decreases as the intake air temperature increases Wednesday March 12 2008 2 05 57 AM Page 36 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL THERMISTOR 101822007 Fig 39 Cutaway View Of Intake Air Temperature IAT Sensor KNOCK SENSOR The knock control system adjusts the ignition timing to minimize knock Wednesday March 12 2008 2 05 57 AM Page 37 2004 Acura TSX 2004 ENGINE PERFORMANCE Fuel amp Emissions Systems TSX TERMINAL Bla ME M AUS oes 2 46 2 PIEZO CERAMIC ELEMENT G01822008 Fig 40 Cutaway View Of Knock Sensor MALFUNCTION INDICATOR LAMP MIL INDICATION IN RELATION TO READINESS CODES The vehicle has certain readiness codes that are part of the on board diagnostics for the emissions systems If the vehicle s battery has been disconnected or gone dead if the DTCs have been cleared or if the ECM PCM has been reset these codes are reset In some states part of the emissions testing is to make sure these codes are set to complete If all of them are not set to complete the vehicle may fail the test or the test cannot
Download Pdf Manuals
Related Search