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Electronic Throttle Control System (V6): Diagnosis Honda Accord VII

Testing & Diagnostics 11 illustrations ~1234 words

DTC CODES

DTCDescription
DTC P0122TP Sensor A Circuit Low Voltage
DTC P0123TP Sensor A Circuit High Voltage
DTC P0222TP Sensor B Circuit Low Voltage
DTC P0223TP Sensor B Circuit High Voltage
DTC P1683Throttle Valve Default Position Spring Performance Problem
DTC P1684Throttle Valve Return Spring Performance Problem
DTC P2101Throttle Actuator System Malfunction
DTC P2108Throttle Actuator Control Module Problem
DTC P2118Throttle Actuator Current Range/Performance Problem
DTC P2122APP Sensor A (Throttle Position Sensor D) Circuit Low Voltage (2003-2004 models)
DTC P2122APP Sensor A (Throttle Position Sensor D) Circuit Low Voltage (2005-2006 models)
DTC P2123APP Sensor A (Throttle Position Sensor D) Circuit High Voltage
DTC 2127APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2003-2004 models)
DTC P2127APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2005-2006 models)
DTC P2128APP Sensor B (Throttle Position Sensor E) Circuit High Voltage
DTC P2135TP Sensor A/B Voltage Incorrect Correlation
DTC P2138APP Sensor A/B (Throttle Position Sensor D/E) Incorrect Voltage Correlation
DTC P2176Throttle Actuator Control System Idle Position Not Learned
DTC P2552Throttle Actuator Control Module Relay Malfunction
DTC U0107Lost Communication With Throttle Actuator Control Module

DTC CHART

DTC 2127: APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2003-2004 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 566

Scheme 566: DTC 2127: APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2003-2004 models)
Scheme 566: DTC 2127: APP Sensor B (Throttle Position Sensor E) Circuit Low Voltage (2003-2004 models)

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Scheme 573
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Check for Temporary DTCs or DTCs with the HDS. Are DTC P0107, P0112, P0117, P0452, P2122, P2127, P2228, P2627 and P2630 indicated at the same time? YES - Go to step 20 . NO - Go to step 4.
  4. Check APP SENSOR B in the DATA LIST with the HDS. Is there about 0.2 V or less? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at APP sensor B and the ECM/PCM.
  5. Turn the ignition switch OFF.
  6. Disconnect the APP sensor 6P connector.
  7. Turn the ignition switch ON (II).
  8. Measure voltage between APP sensor 6P connector terminals No. 1 and No. 2. Is there about 5 V? YES - Go to step 9. NO - Go to step 19 .
  9. Turn the ignition switch OFF.
  10. Jump the SCS line with the HDS.
  11. Disconnect ECM/PCM connector D (17P).
  12. Check for continuity between APP sensor 6P connector terminal No. 3 and body ground. Is there continuity? YES - Repair short in the wire between APP sensor B and the ECM/PCM (D9), then go to step 31 . NO - Go to step 13.
  13. Connect APP sensor 6P connector terminal No. 3 to body ground with a jumper wire.
  14. Check for continuity between ECM/PCM connector terminal D9 and body ground. Is there continuity? YES - Go to step 15. NO - Repair open in the wire between APP sensor B and the ECM/PCM (D9), then go to step 31 .
  15. Reconnect ECM/PCM connector D (17P).
  16. Connect APP sensor 6P connector terminals No. 1 and No. 3 with a jumper wire.
  17. Turn the ignition switch ON (II).
  18. Check APP SENSOR B in the DATA LIST with the HDS. Is there about 0.2 V or less? YES - Go to step 36 . NO - Go to step 29 .
  19. Measure voltage between ECM/PCM connector terminals D10 and D12. Is there about 5 V? YES - Repair open in the wire between APP sensor B and the ECM/PCM (D12), then go to step 31 . NO - Go to step 36 .
  20. Turn the ignition switch OFF.
  21. Jump the SCS line with the HDS.
  22. Disconnect ECM/PCM connectors A (31P) and D (17P).
  23. Disconnect the connectors from these parts: MAP sensor IMT (IMRC) actuator APP sensor EGR valve FTP sensor Input shaft (mainshaft) speed sensor Output shaft (countershaft) speed sensor
  24. Check for continuity between body ground and ECM/PCM connector terminals A31, D2, D6and D12 individually. Is there continuity? YES - Repair short in the wire between the ECM/ PCM (A31, D2, D6, or D12) and each part, then go to step 31 . NO - Go to step 25.
  25. Reconnect ECM/PCM connectors A (31P) and D (17P).
  26. Turn the ignition switch ON (II).
  27. Measure voltage between ECM/PCM connector terminal D6 and body ground. Is there about 5 V? YES - Go to step 28. NO - Go to step 36 .
  28. Continue to monitor voltage at ECM/PCM connector terminal D6 while reconnecting these parts, one at a time: MAP sensor IMT (IMRC) actuator APP sensor EGR valve FTP sensor Input shaft (mainshaft) speed sensor Output shaft (countershaft) speed sensor Did the voltage drop to about 0 V? YES - Replace the sensor that caused the voltage to drop, then go to step 31 . NO - Go to step 36 .
  29. Turn the ignition switch OFF.
  30. Replace the APP sensor (see «APP SENSOR REPLACEMENT»(ref-220841-S42535080602006022100000) ).
  31. Reconnect all connectors.
  32. Turn the ignition switch ON (II).
  33. Reset the ECM/PCM with the HDS.
  34. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-220843-S14332728472006022100000) ).
  35. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2127 is indicated, check for poor connections or loose terminals at APP sensor B and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Troubleshooting is complete.
  36. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220839-S22230196232006022100000) ).
  37. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2127 is indicated, check for poor connections or loose terminals at APP sensor B and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-220840-S07206258092006022100000) ).

APP Sensor Inspection

Note. This procedure checks the APP sensor in its fully closed position. In any other position, the APP sensor stores DTCs which are covered in other troubleshooting procedures. Check for Temporary DTCs or DTCs with the HDS before doing this procedure. If any DTCs are indicated, troubleshoot them first, then do this procedure. Press the accelerator pedal several times to check it. If it does not operate properly, check the pedal, the throttle cable, and the APP sensor individually. If you find a problem in one of them, replace the part(s) that caused the problem.

Scheme 574

Scheme 574: APP Sensor Inspection
Scheme 574: APP Sensor Inspection
  1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
  2. Turn the ignition switch ON (II).
  3. Make sure the HDS communicates with the ECM/PCM.
  4. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. If it is below 2%, the APP sensor is OK. If it is above 2%, adjust the throttle cable (see «THROTTLE CABLE ADJUSTMENT»(ref-220845-S03302096462006022100000) ), then go to step 4.
  5. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. If it is below 2%, the APP sensor is OK. If it is above 2%, Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220839-S22230196232006022100000) ), then go to step 5.
  6. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. If it is below 2%, the APP sensor is OK. If it is above 2%, replace the APP sensor (see «APP SENSOR REPLACEMENT»(ref-220841-S42535080602006022100000) ), then go to step 1 .

Scheme 575

Scheme 575: APP Sensor Replacement
Scheme 575: APP Sensor Replacement
  1. Remove the throttle cable (see «THROTTLE CABLE REMOVAL/INSTALLATION»(ref-220845-S40293936902006022100000) ).
  2. Disconnect the accelerator pedal position (APP) sensor 6P connector (A).
  3. Remove the bolts (B) and the APP sensor (C).
  4. Install the sensor in the reverse order of removal.

Scheme 576

Scheme 576: Throttle Actuator Control Module Replacement
Scheme 576: Throttle Actuator Control Module Replacement
  1. Remove the right kick panel, refer to 2-door (see «2-DOOR - DOOR SILL AREA»(ref-217116-S38157125682006012800000) or 4-door (see «4-DOOR - FRONT DOOR SILL AREA»(ref-217116-S05520744572006012800000) .
  2. Disconnect the throttle actuator control module 16P connector (A).
  3. Remove the bolts (B) and the throttle actuator control module (C).
  4. Install the control module in the reverse order of removal.

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