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Electronic Throttle Control System (4-cyl) Acura TSX II

Engine Control Systems 64 illustrations ~9296 words

Component Location Index

Electronic Throttle Control System

Scheme 87

Scheme 87: Component Location Index
Scheme 87: Component Location Index

DTC P0122: TP Sensor A Circuit Low Voltage

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

Scheme 88

Scheme 88: DTC P0122: TP Sensor A Circuit Low Voltage
Scheme 88: DTC P0122: TP Sensor A Circuit Low Voltage

Scheme 89

Scheme 89
Scheme 89

Scheme 90

Scheme 90
Scheme 90
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Check TP SENSOR A in the DATA LIST with the HDS. Is there about 0.3 V or less? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. -Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  4. Check for Pending or Confirmed DTCs with the HDS. Are DTC P0122 and P0222 indicated at the same time? YES -Go to step 13 . NO -Go to step 5.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the throttle body 6P connector.
  7. Jump the SCS line with the HDS.
  8. Disconnect ECM/PCM connector C (49P).
  9. Check for continuity between throttle body 6P connector terminal No. 1 and body ground. Is there continuity? YES -Repair short in the wire between the throttle body and the ECM/PCM (C20), then go to step 22 . NO -Go to step 27 .
  10. Turn the ignition switch to LOCK (0).
  11. Disconnect the throttle body 6P connector.
  12. Turn the ignition switch to ON (II).
  13. Measure the voltage between throttle body 6P connector terminal No. 2 and body ground. Is there about 5 V? YES -Go to step 17 . NO -Go to step 14.
  14. Turn the ignition switch to LOCK (0).
  15. Jump the SCS line with the HDS.
  16. Disconnect ECM/PCM connector C (49P).
  17. Check for continuity between ECM/PCM connector terminal C12 and throttle body 6P connector terminal No. 2. Is there continuity? YES -Go to step 25 . NO -Repair open in the wire between the throttle body and the ECM/PCM (C12), then go to step 20 .
  18. Turn the ignition switch to LOCK (0).
  19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  20. Reconnect all connectors.
  21. Turn the ignition switch to ON (II).
  22. Reset the ECM/PCM with the HDS.
  23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0122 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  25. Reconnect all connectors.
  26. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0122 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P0123: TP Sensor A Circuit High Voltage

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

Scheme 91

Scheme 91: DTC P0123: TP Sensor A Circuit High Voltage
Scheme 91: DTC P0123: TP Sensor A Circuit High Voltage

Scheme 92

Scheme 92
Scheme 92

Scheme 93

Scheme 93
Scheme 93
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Check TP SENSOR A in the DATA LIST with the HDS. Is there about 4.8 V or more? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  4. Check for Pending or Confirmed DTCs with the HDS. Are DTC P0123 and P0223 indicated at the same time? YES -Go to step 13 . NO -Go to step 5.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the throttle body 6P connector.
  7. Turn the ignition switch to ON (II).
  8. Measure the voltage between throttle body 6P connector terminal No. 1 and body ground. Is there about 5 V? YES -Go to step 18 . NO -Go to step 9.
  9. Turn the ignition switch to LOCK (0).
  10. Jump the SCS line with the HDS.
  11. Disconnect ECM/PCM connector C (49P).
  12. Check for continuity between ECM/PCM connector terminal C20 and throttle body 6P connector terminal No. 1. Is there continuity? YES -Go to step 25 . NO -Repair open in the wire between the throttle body and the ECM/PCM (C20), then go to step 20 .
  13. Turn the ignition switch to LOCK (0).
  14. Disconnect the throttle body 6P connector.
  15. Jump the SCS line with the HDS.
  16. Disconnect ECM/PCM connector C (49P).
  17. Check for continuity between ECM/PCM connector terminal C43 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 25 . NO -Repair open in the wire between the throttle body and the ECM/PCM (C43), then go to step 20 .
  18. Turn the ignition switch to LOCK (0).
  19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  20. Reconnect all connectors.
  21. Turn the ignition switch to ON (II).
  22. Reset the ECM/PCM with the HDS.
  23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0123 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  25. Reconnect all connectors.
  26. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0123 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P0222: TP Sensor B Circuit Low Voltage

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

Scheme 94

Scheme 94: DTC P0222: TP Sensor B Circuit Low Voltage
Scheme 94: DTC P0222: TP Sensor B Circuit Low Voltage

Scheme 95

Scheme 95
Scheme 95

Scheme 96

Scheme 96
Scheme 96
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Check TP SENSOR B in the DATA LIST with the HDS. Is there about 0.3 V or less? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  4. Check for Pending or Confirmed DTCs with the HDS. Are DTC P0122 and P0222 indicated at the same time? YES -Go to step 10 . NO -Go to step 5.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the throttle body 6P connector.
  7. Jump the SCS line with the HDS.
  8. Disconnect ECM/PCM connector C (49P).
  9. Check for continuity between throttle body 6P connector terminal No. 3 and body ground. Is there continuity? YES -Repair short in the wire between the throttle body and the ECM/PCM (C21), then go to step 18 . NO -Go to step 23 .
  10. Measure the voltage between throttle body 6P connector terminal No. 2 and body ground. Is there about 5 V? YES -Go to step 16 . NO -Go to step 11.
  11. Turn the ignition switch to LOCK (0).
  12. Jump the SCS line with the HDS.
  13. Disconnect ECM/PCM connector C (49P).
  14. Disconnect the throttle body 6P connector.
  15. Check for continuity between ECM/PCM connector terminal C12 and throttle body 6P connector terminal No. 2. Is there continuity? YES -Go to step 23 . NO -Repair open in the wire between the throttle body and the ECM/PCM (C12), then go to step 18 .
  16. Turn the ignition switch to LOCK (0).
  17. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  18. Reconnect all connectors.
  19. Turn the ignition switch to ON (II).
  20. Reset the ECM/PCM with the HDS.
  21. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  22. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0222 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 2 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  23. Reconnect all connectors.
  24. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  25. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0222 indicated?

YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the ECM/PCM was substituted, go to step 2 .

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 ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P0223: TP Sensor B Circuit High Voltage

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

Scheme 97

Scheme 97: DTC P0223: TP Sensor B Circuit High Voltage
Scheme 97: DTC P0223: TP Sensor B Circuit High Voltage

Scheme 98

Scheme 98
Scheme 98

Scheme 99

Scheme 99
Scheme 99
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Check TP SENSOR B in the DATA LIST with the HDS. Is there about 4.8 V or more? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  4. Check for Pending or Confirmed DTCs with the HDS. Are DTC P0123 and P0223 indicated at the same time? YES -Go to step 13 . NO -Go to step 5.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the throttle body 6P connector.
  7. Turn the ignition switch to ON (II).
  8. Measure the voltage between throttle body 6P connector terminal No. 3 and body ground. Is there about 5 V? YES -Go to step 18 . NO -Go to step 9.
  9. Turn the ignition switch to LOCK (0).
  10. Jump the SCS line with the HDS.
  11. Disconnect ECM/PCM connector C (49P).
  12. Check for continuity between ECM/PCM connector terminal C21 and throttle body 6P connector terminal No. 3. Is there continuity? YES -Go to step 25 . NO -Repair open in the wire between the throttle body and the ECM/PCM (C21), then go to step 20 .
  13. Turn the ignition switch to LOCK (0).
  14. Disconnect the throttle body 6P connector.
  15. Jump the SCS line with the HDS.
  16. Disconnect ECM/PCM connector C (49P).
  17. Check for continuity between ECM/PCM connector terminal C43 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 25 . NO -Repair open in the wire between the throttle body and the ECM/PCM (C43), then go to step 20 .
  18. Turn the ignition switch to LOCK (0).
  19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  20. Reconnect all connectors.
  21. Turn the ignition switch to ON (II).
  22. Reset the ECM/PCM with the HDS.
  23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0223 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  25. Reconnect all connectors.
  26. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0223 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P1658: ETCS Control Relay ON Malfunction

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

Scheme 100

Scheme 100: DTC P1658: ETCS Control Relay ON Malfunction
Scheme 100: DTC P1658: ETCS Control Relay ON Malfunction

Scheme 101

Scheme 101
Scheme 101

Scheme 102

Scheme 102
Scheme 102
  1. Turn the ignition switch to ON (II).
  2. Do the ETCS TEST in the INSPECTION MENU with the HDS. Is the RELAY circuit OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM. NO -Go to step 3.
  3. Turn the ignition switch to LOCK (0).
  4. Remove the ETCS control relay (A) from the under-hood fuse/relay box.
  5. Test the ETCS control relay (see «POWER RELAY TEST»(/acura/tsx/ii-2008-2014/remont/body-electrical/#relays-4-cyl__power-relay-test) ). Is the ETCS control relay OK? YES -Go to step 6. NO -Replace the ETCS control relay, then go to step 13 .
  6. Jump the SCS line with the HDS.
  7. Disconnect ECM/PCM connector A (49P).
  8. Check for continuity between ECM/PCM connector terminal A21 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A21) and the ETCS control relay, then go to step 13 . NO -Go to step 9.
  9. Disconnect ECM/PCM connector C (49P).
  10. Turn the ignition switch to ON (II).
  11. Measure the voltage between ECM/PCM connector terminal C1 and body ground. Is there battery voltage? YES -Repair short to power in the wire between the ECM/PCM (C1) and the ETCS control relay, then go to step 12. NO -Go to step 18 .
  12. Turn the ignition switch to LOCK (0).
  13. Reconnect all connectors.
  14. Turn the ignition switch to ON (II).
  15. Reset the ECM/PCM with the HDS.
  16. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  17. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1658 indicated? YES -Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  18. Turn the ignition switch to LOCK (0).
  19. Reconnect all connectors.
  20. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  21. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P1658 indicated?

YES -Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the ECM/PCM was substituted, go to step 1 .

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 ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P1659: ETCS Control Relay OFF Malfunction

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

Scheme 103

Scheme 103: DTC P1659: ETCS Control Relay OFF Malfunction
Scheme 103: DTC P1659: ETCS Control Relay OFF Malfunction

Scheme 104

Scheme 104
Scheme 104

Scheme 105

Scheme 105
Scheme 105

Scheme 106

Scheme 106
Scheme 106

Scheme 107

Scheme 107
Scheme 107

Scheme 108

Scheme 108
Scheme 108

Scheme 109

Scheme 109
Scheme 109

Scheme 110

Scheme 110
Scheme 110
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1659 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM.
  4. Turn the ignition switch to LOCK (0).
  5. Check the No. 18 DBW (ETCS) (15 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES -Go to step 6. NO -Go to step 17 .
  6. Remove the ETCS control relay (A) from the under-hood fuse/relay box.
  7. Test the ETCS control relay (see «POWER RELAY TEST»(/acura/tsx/ii-2008-2014/remont/body-electrical/#relays-4-cyl__power-relay-test) ). Is the ETCS control relay OK? YES -Go to step 8. NO -Replace the ETCS control relay, then go to step 23 .
  8. Turn the ignition switch to ON (II).
  9. Measure the voltage between ETCS control relay 4P connector terminal No. 4 and body ground. Is there battery voltage? YES -Go to step 10. NO -Check the under-hood fuse/relay box, and replace it if needed (see «REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/fuses-circuit-breakers/#under-hood-fuserelay-box-4-cyl__removal-and-installation) ), then go to step 22 .
  10. Measure the voltage between ETCS control relay 4P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 11. NO -Check the under-hood fuse/relay box, and replace it if needed (see «REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/fuses-circuit-breakers/#under-hood-fuserelay-box-4-cyl__removal-and-installation) ), then go to step 22 .
  11. Turn the ignition switch to LOCK (0).
  12. Jump the SCS line with the HDS.
  13. Disconnect ECM/PCM connector C (49P).
  14. Check for continuity between ETCS control relay 4P connector terminal No. 2 and ECM/PCM connector terminal C1. Is there continuity? YES -Go to step 15. NO -Repair open in the wire between the ECM/PCM (CI) and the ETCS control relay, then go to step 23 .
  15. Disconnect ECM/PCM connector A (49P).
  16. Check for continuity between ETCS control relay 4P connector terminal No. 3 and ECM/PCM connector terminal A21. Is there continuity? YES -Go to step 28 . NO -Repair open in the wire between the ECM/PCM (A21) and the ETCS control relay, then go to step 23 .
  17. Remove the ETCS control relay (A) from the under-hood fuse/relay box.
  18. Jump the SCS line with the HDS.
  19. Disconnect ECM/PCM connector C (49P).
  20. Check for continuity between ECM/PCM connector terminal C1 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (C1) and the ETCS control relay, then go to step 23 . NO -Go to step 21.
  21. Check for continuity between ETCS control relay 4P connector terminal No. 1 and body ground. Is there continuity? YES -Check the under-hood fuse/relay box, and replace it if needed (see «REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/fuses-circuit-breakers/#under-hood-fuserelay-box-4-cyl__removal-and-installation) ), then go to step 23 . NO -Go to step 28 .
  22. Turn the ignition switch to LOCK (0).
  23. Reconnect all connectors.
  24. Turn the ignition switch to ON (II).
  25. Reset the ECM/PCM with the HDS.
  26. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1659 indicated? YES -Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  28. Reconnect all connectors.
  29. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  30. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1659 indicated? YES -Check for poor connections or loose terminals at the ETCS control relay and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P1683: Throttle Valve Default Position Spring Performance Problem

CAUTIONDo not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the ignition switch is in ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.

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

Scheme 111

Scheme 111
Scheme 111
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3, 000 RPM without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
  4. Turn the ignition switch to LOCK (0), and wait 10 seconds.
  5. Turn the ignition switch to ON (II).
  6. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1683 indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  7. Turn the ignition switch to LOCK (0).
  8. Disconnect the intake air duct from the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  9. Push the throttle valve closed as shown.
  10. Release the throttle valve. Does the throttle valve return? YES -Clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ), then go to step 12 . NO -Go to step 11.
  11. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  12. Turn the ignition switch to ON (II).
  13. Reset the ECM/PCM with the HDS.
  14. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  15. Turn the ignition switch to LOCK (0), and wait 10 seconds.
  16. Turn the ignition switch to ON (II).
  17. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P1683 indicated?

YES -If the throttle body was cleaned, go to step 11 . If the throttle body was replaced, check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 .

NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P1684: Throttle Valve Return Spring Performance Problem

CAUTIONDo not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the ignition switch is in ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.

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

Scheme 112

Scheme 112
Scheme 112
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3, 000 RPM without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
  4. Turn the ignition switch to LOCK (0), and wait 10 seconds.
  5. Turn the ignition switch to ON (II).
  6. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1684 indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  7. Turn the ignition switch to LOCK (0).
  8. Disconnect the intake air duct from the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  9. Push the throttle valve open as shown.
  10. Release the throttle valve. Does the throttle valve return? YES -Clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ), then go to step 12 . NO -Go to step 11.
  11. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  12. Turn the ignition switch to ON (II).
  13. Reset the ECM/PCM with the HDS.
  14. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  15. Turn the ignition switch to LOCK (0), and wait 10 seconds.
  16. Turn the ignition switch to ON (II).
  17. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P1684 indicated?

YES -If the throttle body was cleaned, go to step 11 . If the throttle body was replaced, check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 .

NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2101: Electronic Throttle Control System (ETCS) Malfunction

CAUTIONDo not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the ignition switch is in ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.

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

Scheme 113

Scheme 113
Scheme 113

Scheme 114

Scheme 114
Scheme 114

Scheme 115

Scheme 115
Scheme 115
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Do the ETCS TEST in the INSPECTION MENU with the HDS.
  4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2101 indicated? YES -Go to step 7 . NO -Go to step 5.
  5. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VEHICLE SPEED APP SENSOR
  6. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2101 indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ).
  7. Turn the ignition switch to LOCK (0).
  8. Disconnect the intake air duct from the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  9. Turn the ignition switch to ON (II).
  10. Clear the DTC with the HDS.
  11. Do the ETCS TEST in the INSPECTION MENU with the HDS.
  12. Visually check the throttle valve operation. Does the throttle valve operate smoothly? YES -Clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ), then go to step 23 and recheck. If DTC P2101 is indicated, go to step 20 . NO -Go to step 13.
  13. Turn the ignition switch to LOCK (0).
  14. Disconnect the throttle body 6P connector.
  15. Jump the SCS line with the HDS.
  16. Disconnect ECM/PCM connector C (49P).
  17. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
  18. Check for continuity between ECM/PCM connector terminals C3 and C4. Is there continuity? YES -Go to step 19. NO -Repair open in the wires between the throttle body and the ECM/PCM (C3, C4), then go to step 22.
  19. At the throttle body side, measure the resistance between throttle body 6P connector terminals No. 5 and No. 6 with the throttle fully closed. THROTTLE BODY 6P CONNECTOR Is there about 1.0 kohms or more? YES -Go to step 21. NO -Go to step 28
  20. Turn the ignition switch to LOCK (0).
  21. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  22. Reconnect all connectors.
  23. Turn the ignition switch to ON (II).
  24. Reset the ECM/PCM with the HDS.
  25. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  26. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VEHICLE SPEED APP SENSOR
  27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2101 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ), and go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  28. Reconnect all connectors.
  29. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  30. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VEHICLE SPEED APPSENSOR
  31. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2101 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then go to step 30. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2118: Throttle Actuator Current Range/Performance Problem

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

Scheme 116

Scheme 116: DTC P2118: Throttle Actuator Current Range/Performance Problem
Scheme 116: DTC P2118: Throttle Actuator Current Range/Performance Problem

Scheme 117

Scheme 117
Scheme 117

Scheme 118

Scheme 118
Scheme 118

Scheme 119

Scheme 119
Scheme 119
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Slowly press the accelerator pedal to the floor.
  4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2118 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  5. Turn the ignition switch to LOCK (0).
  6. Jump the SCS line with the HDS.
  7. Disconnect the throttle body 6P connector.
  8. Disconnect ECM/PCM connector C (49P).
  9. Check for continuity between ECM/PCM connector terminal C43 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 10. NO -Repair open in the wire between the throttle body and the ECM/PCM (C43), then go to step 16 .
  10. Check for continuity between throttle body 6P connector terminals No. 5 and No. 6. Is there continuity? YES -Repair short in the wires between throttle body 6P connector terminals No. 5 (ETCS- line) and No. 6 (ETCS+ line), then go to step 16 . NO -Go to step 11.
  11. Check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually. Is there continuity? YES -Repair short in the wire between the throttle body 6P connector and body ground, then go to step 16 . NO -Go to step 12.
  12. At the throttle body side, measure the resistance between throttle body 6P connector terminals No. 5 and No. 6 with the throttle fully closed. Is there about 1.0 ohms or less? YES -Go to step 13. NO -Go to step 15 .
  13. At the throttle body side, check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually. Is there continuity? YES -Go to step 14. NO -Go to step 23
  14. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  15. Reconnect all connectors.
  16. Turn the ignition switch to ON (II).
  17. Reset the ECM/PCM with the HDS.
  18. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  19. Turn the ignition switch to LOCK (0).
  20. Turn the ignition switch to ON (II).
  21. Slowly press the accelerator pedal to the floor.
  22. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2118 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  23. Reconnect all connectors.
  24. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  25. Turn the ignition switch to LOCK (0).
  26. Turn the ignition switch to ON (II).
  27. Slowly press the accelerator pedal to the floor.
  28. Check for Pending or Confirmed DTCs with the HDS.

Is DTCP2118 indicated?

YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step 25 . If the ECM/PCM was substituted, go to step 1 .

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 ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2122: APP Sensor A (TP Sensor D) Circuit Low Voltage

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

Scheme 120

Scheme 120: DTC P2122: APP Sensor A (TP Sensor D) Circuit Low Voltage
Scheme 120: DTC P2122: APP Sensor A (TP Sensor D) Circuit Low Voltage

Scheme 121

Scheme 121
Scheme 121

Scheme 122

Scheme 122
Scheme 122

Scheme 123

Scheme 123
Scheme 123

Scheme 124

Scheme 124
Scheme 124

Scheme 125

Scheme 125
Scheme 125

Scheme 126

Scheme 126
Scheme 126
  1. Turn the ignition switch to ON (II).
  2. Check APP SENSOR A in the DATA LIST with the HDS. Is there about 0.2 V or less? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the APP sensor and the ECM/PCM.
  3. Turn the ignition switch to LOCK (0).
  4. Disconnect the APP sensor 6P connector.
  5. Turn the ignition switch to ON (II).
  6. Measure the voltage between APP sensor 6P connector terminals No. 2 and No. 3. Is there about 5 V? YES -Go to step 7. NO -Go to step 17 .
  7. Turn the ignition switch to LOCK (0).
  8. Jump the SCS line with the HDS.
  9. Disconnect ECM/PCM connector A (49P).
  10. Check for continuity between APP sensor 6P connector terminal No. 1 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A18) and the APP sensor, then go to step 24 . NO -Go to step 11.
  11. Connect APP sensor 6P connector terminal No. 1 to body ground with a jumper wire.
  12. Check for continuity between ECM/PCM connector terminal A18 and body ground. Is there continuity? YES -Go to step 13. NO -Repair open in the wire between the ECM/PCM (A18) and the APP sensor, then go to step 24 .
  13. Reconnect ECM/PCM connector A (49P).
  14. Connect APP sensor 6P connector terminals No. 1 and No. 3 with a jumper wire.
  15. Turn the ignition switch to ON (II).
  16. Check APP SENSOR A in the DATA LIST with the HDS. Is there about 0.2 V or less? YES -Go to step 29 . NO -Go to step 22 .
  17. Turn the ignition switch to LOCK (0).
  18. Jump the SCS line with the HDS.
  19. Disconnect ECM/PCM connector A (49P).
  20. Connect APP sensor 6P connector terminal No. 3 to body ground with a jumper wire.
  21. Check for continuity between ECM/PCM connector terminal A26 and body ground. Is there continuity? YES -Go to step 30 . NO -Repair open in the wire between the ECM/PCM (A26) and the APP sensor, then go to step 24 .
  22. Turn the ignition switch to LOCK (0).
  23. Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/engine-control-systems/#electronic-throttle-control-system-4-cyl) ).
  24. Reconnect all connectors.
  25. Turn the ignition switch to ON (II).
  26. Reset the ECM/PCM with the HDS.
  27. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  28. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2122 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC' s troubleshooting.
  29. Turn the ignition switch to LOCK (0).
  30. Reconnect all connectors.
  31. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  32. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P2122 indicated?

YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the ECM/PCM was substituted, go to step 1 .

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 ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2123: APP Sensor A (TP Sensor D) Circuit High Voltage

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

Scheme 127

Scheme 127: DTC P2123: APP Sensor A (TP Sensor D) Circuit High Voltage
Scheme 127: DTC P2123: APP Sensor A (TP Sensor D) Circuit High Voltage

Scheme 128

Scheme 128
Scheme 128

Scheme 129

Scheme 129
Scheme 129
  1. Turn the ignition switch to ON (II).
  2. Check APP SENSOR A in the DATA LIST with the HDS. Is there about 4.9 V or more? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the APP sensor and the ECM/PCM.
  3. Turn the ignition switch to LOCK (0).
  4. Disconnect the APP sensor 6P connector.
  5. Turn the ignition switch to ON (II).
  6. Measure the voltage between APP sensor 6P connector terminals No. 2 and No. 3. Is there about 5 V? YES -Go to step 12 . NO -Go to step 7.
  7. Turn the ignition switch to LOCK (0).
  8. Jump the SCS line with the HDS.
  9. Disconnect ECM/PCM connector A (49P).
  10. Connect APP sensor 6P connector terminal No. 2 to body ground with a jumper wire.
  11. Check for continuity between ECM/PCM connector terminal A36 and body ground. Is there continuity? YES -Go to step 19 . NO -Repair open in the wire between the ECM/PCM (A36) and the APP sensor, then go to step 14 .
  12. Turn the ignition switch to LOCK (0).
  13. Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/engine-control-systems/#electronic-throttle-control-system-4-cyl) ).
  14. Reconnect all connectors.
  15. Turn the ignition switch to ON (II).
  16. Reset the ECM/PCM with the HDS.
  17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  18. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2123 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  19. Reconnect all connectors.
  20. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  21. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P2123 indicated?

YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the ECM/PCM was substituted, go to step 1 .

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 ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2127: APP Sensor B (TP Sensor E) Circuit Low Voltage

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

Scheme 130

Scheme 130: DTC P2127: APP Sensor B (TP Sensor E) Circuit Low Voltage
Scheme 130: DTC P2127: APP Sensor B (TP Sensor E) Circuit Low Voltage

Scheme 131

Scheme 131
Scheme 131

Scheme 132

Scheme 132
Scheme 132

Scheme 133

Scheme 133
Scheme 133

Scheme 134

Scheme 134
Scheme 134

Scheme 135

Scheme 135
Scheme 135

Scheme 136

Scheme 136
Scheme 136
  1. Turn the ignition switch to ON (II).
  2. Check APP SENSOR B in the DATA LIST with the HDS. Is there about 0.2 V or less? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the APP sensor and the ECM/PCM.
  3. Turn the ignition switch to LOCK (0).
  4. Disconnect the APP sensor 6P connector.
  5. Turn the ignition switch to ON (II).
  6. Measure the voltage between APP sensor 6P connector terminals No. 5 and No. 6. Is there about 5 V? YES -Go to step 7. NO -Go to step 17 .
  7. Turn the ignition switch to LOCK (0).
  8. Jump the SCS line with the HDS.
  9. Disconnect ECM/PCM connector A (49P)
  10. Check for continuity between APP sensor 6P connector terminal No. 4 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A19) and the APP sensor, then go to step 24 . NO -Go to step 11.
  11. Connect APP sensor 6P connector terminal No. 4 to body ground with a jumper wire.
  12. Check for continuity between ECM/PCM connector terminal A19 and body ground. Is there continuity? YES -Go to step 13. NO -Repair open in the wire between the ECM/PCM (A19) and the APP sensor, then go to step 24 .
  13. Reconnect ECM/PCM connector A (49P).
  14. Connect APP sensor 6P connector terminals No. 4 and No. 6 with a jumper wire.
  15. Turn the ignition switch to ON (II).
  16. Check APP SENSOR B in the DATA LIST with the HDS. Is there about 0.2 V or less? YES -Go to step 29 . NO -Go to step 22 .
  17. Turn the ignition switch to LOCK (0).
  18. Jump the SCS line with the HDS.
  19. Disconnect ECM/PCM connector A (49P).
  20. Connect APP sensor 6P connector terminal No. 6 to body ground with a jumper wire. APP SENSOR 6P CONNECTOR
  21. Check for continuity between ECM/PCM connector terminal A25 and body ground. Is there continuity? YES -Go to step 30 . NO -Repair open in the wire between the ECM/PCM (A25) and the APP sensor, then go to step 24 .
  22. Turn the ignition switch to LOCK (0).
  23. Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/engine-control-systems/#electronic-throttle-control-system-4-cyl) ).
  24. Reconnect all connectors.
  25. Turn the ignition switch to ON (II).
  26. Reset the ECM/PCM with the HDS.
  27. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  28. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2127 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  29. Turn the ignition switch to LOCK (0).
  30. Reconnect all connectors.
  31. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  32. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2127 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2128: APP Sensor B (TP Sensor E) Circuit High Voltage

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

Scheme 137

Scheme 137: DTC P2128: APP Sensor B (TP Sensor E) Circuit High Voltage
Scheme 137: DTC P2128: APP Sensor B (TP Sensor E) Circuit High Voltage

Scheme 138

Scheme 138
Scheme 138

Scheme 139

Scheme 139
Scheme 139
  1. Turn the ignition switch to ON (II).
  2. Check APP SENSOR B in the DATA LIST with the HDS. Is there about 4.0 V or more? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the APP sensor and the ECM/PCM.
  3. Turn the ignition switch to LOCK (0).
  4. Disconnect the APP sensor 6P connector.
  5. Turn the ignition switch to ON (II).
  6. Measure the voltage between APP sensor 6P connector terminals No. 5 and No. 6. APP SENSOR 6P CONNECTOR Is there about 5 V? YES -Go to step 12 . NO -Go to step 7.
  7. Turn the ignition switch to LOCK (0).
  8. Jump the SCS line with the HDS.
  9. Disconnect ECM/PCM connector A (49P).
  10. Connect APP sensor 6P connector terminal No. 5 to body ground with a jumper wire.
  11. Check for continuity between ECM/PCM connector terminal A35 and body ground. Is there continuity? YES -Go to step 19 . NO -Repair open in the wire between the ECM/PCM (A35) and the APP sensor, then go to step 14 .
  12. Turn the ignition switch to LOCK (0).
  13. Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/engine-control-systems/#electronic-throttle-control-system-4-cyl) ).
  14. Reconnect all connectors.
  15. Turn the ignition switch to ON (II).
  16. Reset the ECM/PCM with the HDS.
  17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  18. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2128 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  19. Reconnect all connectors.
  20. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  21. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2128 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2135: TP Sensor A/B Incorrect Voltage Correlation

CAUTIONDo not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the ignition switch is in ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.

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

Scheme 140

Scheme 140
Scheme 140

Scheme 141

Scheme 141
Scheme 141
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Do the ETCS TEST in the INSPECTION MENU with the HDS.
  4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2135 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the intake air duct from the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  7. Turn the ignition switch to ON (II).
  8. Visually check the throttle valve operation while you clear the DTC with the HDS. Does the valve temporarily move to its fully closed position? YES -Go to step 15 . NO -Go to step 9.
  9. Turn the ignition switch to LOCK (0).
  10. Jump the SCS line with the HDS.
  11. Disconnect ECM/PCM connector C (49P).
  12. Check for continuity between ECM/PCM connector terminals C20 and C21. Is there continuity? YES -Go to step 13. NO -Go to step 22 .
  13. Disconnect the throttle body 6P connector.
  14. Check for continuity between ECM/PCM connector terminals C20 and C21. Is there continuity? YES -Repair short in the wires between ECM/PCM connector terminals C20 (TPSA line) and C21 (TPSB line), then go to step 17 . NO -Go to step 15.
  15. Turn the ignition switch to LOCK (0).
  16. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  17. Reconnect all connectors.
  18. Turn the ignition switch to ON (II).
  19. Reset the ECM/PCM with the HDS.
  20. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  21. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2135 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  22. Reconnect all connectors.
  23. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2135 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.

DTC P2138: APP Sensor A/B (TP Sensor D/E) incorrect Voltage Correlation

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

Scheme 142

Scheme 142: DTC P2138: APP Sensor A/B (TP Sensor D/E) incorrect Voltage Correlation
Scheme 142: DTC P2138: APP Sensor A/B (TP Sensor D/E) incorrect Voltage Correlation

Scheme 143

Scheme 143
Scheme 143
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with HDS.
  3. Press the accelerator pedal to the floor.
  4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2138 indicated? YES -Go to step 5 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the APP sensor and the ECM/PCM.
  5. Check APP SENSOR A and APP SENSOR B in the DATA LIST with the HDS. Are they the same voltage? YES -Go to step 6. NO -Go to step 12 .
  6. Turn the ignition switch to LOCK (0).
  7. Jump the SCS line with the HDS.
  8. Disconnect ECM/PCM connector A (49P).
  9. Check for continuity between ECM/PCM connector terminals A18 and A19. Is there continuity? YES -Go to step 10. NO -Go to step 22 .
  10. Disconnect the APP sensor 6P connector.
  11. Check for continuity between ECM/PCM connector terminals A18 and A19. Is there continuity? YES -Repair short in the wires between ECM/PCM connector terminals A18 (APSA line) and A19 (APSB line), then go to step 14 . NO -Go to step 13 .
  12. Turn the ignition switch to LOCK (0).
  13. Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/engine-control-systems/#electronic-throttle-control-system-4-cyl) ).
  14. Reconnect all connectors.
  15. Turn the ignition switch to ON (II).
  16. Reset the ECM/PCM with the HDS.
  17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  18. Turn the ignition switch to LOCK (0).
  19. Turn the ignition switch to ON (II).
  20. Press the accelerator pedal to the floor.
  21. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2138 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  22. Reconnect all connectors.
  23. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  24. Turn the ignition switch to LOCK (0).
  25. Turn the ignition switch to ON (II).
  26. Press the accelerator pedal to the floor.
  27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2138 indicated? YES -Check for poor connections or loose terminals at the APP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then go to step 24 . If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting

DTC P2176: Throttle Actuator Control System Idle Position Not Learned

CAUTIONDo not insert your fingers into the installed throttle body when you turn the ignition switch to ON (II) or while the ignition switch is in ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If DTC P2135 is stored at the same time as DTC P2176, troubleshoot DTC P2135 first, then recheck for DTC P2176.

Scheme 144

Scheme 144
Scheme 144

Scheme 145

Scheme 145
Scheme 145
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Turn the ignition switch to LOCK (0).
  4. Turn the ignition switch to ON (II), and wait 10 seconds.
  5. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2176 indicated? YES -Go to step 6. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ).
  6. Turn the ignition switch to LOCK (0).
  7. Disconnect the intake air duct from the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  8. Turn the ignition switch to ON (II).
  9. Clear the DTC with the HDS.
  10. Visually check the throttle valve operation while doing the ETCS TEST in the INSPECTION MENU with the HDS. Does the throttle valve move to its fully closed position? YES -Go to step 11. NO -Go to step 12 .
  11. Check for sludge or carbon on the throttle valve. Is there sludge or carbon on the throttle valve? YES -Clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ), then go to step 21 and recheck. NO -Go to step 18 .
  12. Turn the ignition switch to LOCK (0).
  13. Disconnect the throttle body 6P connector.
  14. Jump the SCS line with the HDS.
  15. Disconnect ECM/PCM connector C (49P).
  16. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
  17. Check for continuity between ECM/PCM connector terminals C3 and C4. Is there continuity? YES -Go to step 27 . NO -Repair open in the wires between the throttle body and the ECM/PCM (C3, C4), then go to step 20 .
  18. Turn the ignition switch to LOCK (0).
  19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-removalinstallation) ).
  20. Reconnect all connectors.
  21. Turn the ignition switch to ON (II).
  22. Reset the ECM/PCM with the HDS.
  23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#idle-control-system-4-cyl__ecmpcm-idle-learn-procedure) ).
  24. Turn the ignition switch to LOCK (0).
  25. Turn the ignition switch to ON (II), and wait 10 seconds.
  26. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2176 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/ii-2008-2014/remont/mechanical/#intake-air-system-4-cyl__throttle-body-cleaning) ), and go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
  27. Reconnect all connectors.
  28. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ).
  29. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2176 indicated? YES -Check for poor connections or loose terminals at the throttle body and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . 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»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting

APP Sensor Signal 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 Pending or Confirmed 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 its operation. If it does not operate smoothly, check the pedal. If you find a problem, replace the accelerator pedal module (see ACCELERATOR PEDAL MODULE REMOVAL AND INSTALLATION ).

Scheme 146

Scheme 146: APP Sensor Signal Inspection
Scheme 146: APP Sensor Signal 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 to ON (II).
  3. Make sure the HDS communicates with the ECM/PCM. If it doesn't, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__dlc-circuit-troubleshooting) ).
  4. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. If it is 0%, the APP sensor is OK. If it is not 0%, update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#pgm-fi-system-4-cyl__ecmpcm-update) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/ii-2008-2014/remont/testing-diagnostics/#fuel-and-emissions-systems-4-cyl__substituting-the-ecmpcm) ), then go to step 5.
  5. Make sure the accelerator pedal is not pressed, then check the APP SENSOR in the DATA LIST with the HDS. If it is 0%, the APP sensor is OK. If it is not 0%, replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL AND INSTALLATION»(/acura/tsx/ii-2008-2014/remont/engine-control-systems/#electronic-throttle-control-system-4-cyl) ), then go to step 1 .

Scheme 147

Scheme 147: Removal
Scheme 147: Removal
  1. Disconnect the APP sensor 6P connector (A).
  2. Remove the two mounting nuts (B), then remove the clip (C). Using a flat-tip screwdriver (D), push the lock (E), then remove the accelerator pedal pad (F) from the pedal stop (G).
  3. Remove the accelerator pedal module. NOTE: The APP sensor is not available separately. Do not disassemble the accelerator pedal module. If the pedal stop is damaged, replace it by pulling back the carpet (A), and removing the nuts (B), the bolt (C), and the pedal stop (D).

Scheme 148

Scheme 148
Scheme 148

Scheme 149

Scheme 149: Installation
Scheme 149: Installation

Scheme 150

Scheme 150
Scheme 150
  1. Attach the accelerator pedal pad (A) to the pedal stop (B), and slide the pad until it locks with a clicking sound.
  2. Install a new clip (A). NOTE: The clip must be replaced whenever the accelerator pedal module is installed. Make sure that the accelerator pedal module and the clip are secure.
  3. Install the nuts (B), and connect the APP sensor 6P connector (C).

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