Electronic Throttle Control System Acura MDX II рестайлинг

Scheme 8

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 9

Scheme 10

Scheme 11

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 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 PCM connector B (49P).
9. Check for continuity between throttle body 6P connector terminal No. 1 and body ground. Is there continuity YES -Repair a short in the wire between the throttle body and the PCM (B17), then go to step 20 . NO -Go to step 25 .
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 18 . NO -Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Jump the SCS line with the HDS.
16. Disconnect PCM connector B (49P).
17. Check for continuity between PCM connector terminal B18 and throttle body 6P connector terminal No. 2. Is there continuity? YES -Go to step 25 . NO -Repair an open in the wire between the throttle body and the PCM (B18), then go to step 20 .
18. Turn the ignition switch to LOCK (0).
19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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 12

Scheme 13

Scheme 14

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 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 PCM connector B (49P).
12. Check for continuity between PCM connector terminal B17 and throttle body 6P connector terminal No. 1. Is there continuity? YES -Go to step 25 . NO -Repair an open in the wire between the throttle body and the PCM (B17), 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 PCM connector B (49P).
17. Check for continuity between PCM connector terminal B33 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 25 . NO -Repair an open in the wire between the throttle body and the PCM (B33), then go to step 20 .
18. Turn the ignition switch to LOCK (0).
19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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 15

Scheme 16

Scheme 17

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 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 PCM connector B (49P).
9. Check for continuity between throttle body 6P connector terminal No. 3 and body ground. Is there continuity? YES -Repair a short in the wire between the throttle body and the PCM (B26), then go to step 20 . NO -Go to step 25 .
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 18 . NO -Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Jump the SCS line with the HDS.
16. Disconnect PCM connector B (49P).
17. Check for continuity between PCM connector terminal B18 and throttle body 6P connector terminal No. 2. Is there continuity? YES -Go to step 25 . NO -Repair an open in the wire between the throttle body and the PCM (B18), then go to step 20 .
18. Turn the ignition switch to LOCK (0).
19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
24. 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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
27. 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__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 18

Scheme 19

Scheme 20

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 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 PCM connector B (49P).
12. Check for continuity between PCM connector terminal B26 and throttle body 6P connector terminal No. 3. Is there continuity? YES -Go to step 25 . NO -Repair an open in the wire between the throttle body and the PCM (B26), 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 PCM connector B (49P).
17. Check for continuity between PCM connector terminal B33 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 25 . NO -Repair an open in the wire between the throttle body and the PCM (B33), then go to step 20 .
18. Turn the ignition switch to LOCK (0).
19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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 21

Scheme 22

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 under-hood fuse/relay box (ETCS control relay) and the PCM. NO -Go to step 3.
3. Turn the ignition switch to LOCK (0).
4. Test the ETCS control relay (built into the relay control module) (see «RELAY CONTROL MODULE TEST»(/acura/mdx/ii-2010-2013/remont/body-electrical/#relays__relay-control-module-test) ). Is the ETCS control relay OK? YES -Go to step 5. NO -Replace the under-hood fuse/relay box (see «DTC B1065: RELAY CONTROL MODULE LOST COMMUNICATION WITH DRIVER'S MPCS UNIT (DRLOCKSW MESSAGE)»(/acura/mdx/ii-2010-2013/remont/fuses-circuit-breakers/#under-hood-fuserelay-box__dtc-b1065-relay-control-module-lost) ), then go to step 14 .
5. Jump the SCS line with the HDS.
6. Disconnect PCM connector A (49P).
7. Disconnect under-hood fuse/relay box connector E (14P).
8. Check for continuity between PCM connector terminal A29 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (A29) and the under-hood fuse/relay box (ETCS control relay), then go to step 14 . NO -Go to step 9.
9. Disconnect PCM connector C (49P).
10. Disconnect under-hood fuse/relay box connector H (9P).
11. Turn the ignition switch to ON (II).
12. Measure the voltage between PCM connector terminal C4 and body ground. Is there battery voltage? YES -Repair a short to power in the wire between the PCM (C4) and the under-hood fuse/relay box (ETCS control relay), then go to step 13. NO -Go to step 19 .
13. Turn the ignition switch to LOCK (0).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the PCM with the HDS.
17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
18. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1658 indicated? YES -Check for poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the 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. Turn the ignition switch to LOCK (0).
20. Reconnect all connectors.
21. Update the PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
22. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1658 indicated? YES -Check for poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__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 23

Scheme 24

Scheme 25

Scheme 26

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 under-hood fuse/relay box (ETCS control relay) and the PCM.
4. Turn the ignition switch to LOCK (0).
5. Check the No. 10 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 14 .
6. Test the ETCS control relay (built into the relay control module) (see «RELAY CONTROL MODULE TEST»(/acura/mdx/ii-2010-2013/remont/body-electrical/#relays__relay-control-module-test) ). Is the ETCS control relay OK? YES -Go to step 7. NO -Replace the under-hood fuse/relay box (see «DTC B1065: RELAY CONTROL MODULE LOST COMMUNICATION WITH DRIVER'S MPCS UNIT (DRLOCKSW MESSAGE)»(/acura/mdx/ii-2010-2013/remont/fuses-circuit-breakers/#under-hood-fuserelay-box__dtc-b1065-relay-control-module-lost) ), then go to step 22 .
7. Jump the SCS line with the HDS.
8. Disconnect PCM connector C (49P).
9. Disconnect under-hood fuse/relay box connector H (9P).
10. Check for continuity between under-hood fuse/relay box connector H (9P) terminal No. 7 and PCM connector terminal C4. Is there continuity? YES -Go to step 11. NO -Repair an open in the wire between the PCM (C4) and the under-hood fuse/relay box, then go to step 22 .
11. Disconnect PCM connector A (49P).
12. Disconnect under-hood fuse/relay box connector E (14P).
13. Check for continuity between under-hood fuse/relay box connector E (14P) terminal No. 14 and PCM connector terminal A29. Is there continuity? YES -Go to step 27 . NO -Repair an open in the wire between the PCM (A29) and the under-hood fuse/relay box, then go to step 22 .
14. Jump the SCS line with the HDS.
15. Disconnect PCM connector C (49P).
16. Disconnect under-hood fuse/relay box connector H (9P).
17. Check for continuity between PCM connector terminal C4 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (C4) and the under-hood fuse/relay box, then go to step 22 . NO -Go to step 18 .
18. Reconnect under-hood fuse/relay box connector H (9P), and replace the No. 10 DBW (ETCS) fuse in the under-hood fuse/relay box.
19. Turn the ignition switch to ON (II).
20. Measure the voltage between PCM connector terminal C4 and body ground. Is there battery voltage? YES -Go to step 27 . NO -Replace the under-hood fuse/relay box. Also replace the No. 10 DBW (ETCS) fuse in the under-hood fuse/relay box, then go to step 21.
21. Turn the ignition switch to LOCK (0).
22. Reconnect all connectors.
23. Turn the ignition switch to ON (II).
24. Reset the PCM with the HDS.
25. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
26. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1659 indicated? YES -Check for poor connections or loose terminals at the under-hood fuse/relay box and the 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.
27. Reconnect all connectors.
28. Update the PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
29. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1659 indicated? YES -Check for poor connections or loose terminals at the under-hood fuse/relay box and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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

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

Scheme 27

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 (in P or N) 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 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/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__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 TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ), then go to step 12 , and recheck. If DTC P1683 is indicated, go to step 11. NO -Go to step 11.
11. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
12. Turn the ignition switch to ON (II).
13. Reset the PCM with the HDS.
14. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 -Check for poor connections or loose terminals at the throttle body and the 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

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

Scheme 28

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 (in P or N) 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 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/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__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 TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ), then go to step 12 , and recheck. If DTC P1684 is indicated, go to step 11. NO -Go to step 11.
11. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
12. Turn the ignition switch to ON (II).
13. Reset the PCM with the HDS.
14. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 -Check for poor connections or loose terminals at the throttle body and the 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: ETCS 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 29

Scheme 30

Scheme 31

Scheme 32

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 A
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 PCM, then clean the throttle body (see «THROTTLE BODY TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ).
7. Turn the ignition switch to LOCK (0).
8. Disconnect the intake air duct from the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__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 TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ), then go to step 25 and recheck. If DTC P2101 is indicated, go to step 22 . 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 PCM connector B (49P).
17. Check for continuity between PCM connector terminal B33 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 18. NO -Repair an open in the wire between the throttle body and the PCM (B33), then go to step 24 .
18. Disconnect PCM connector C (49P).
19. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
20. Check for continuity between PCM connector terminals C2 and C3. Is there continuity? YES -Go to step 21. NO -Repair an open in the wires between the throttle body and the PCM (C2, C3), then go to step 24 .
21. 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 kohms or more? YES -Go to step 23 . NO -Go to step 30 .
22. Turn the ignition switch to LOCK (0).
23. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
24. Reconnect all connectors.
25. Turn the ignition switch to ON (II).
26. Reset the PCM with the HDS.
27. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
28. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VEHICLE SPEED APP SENSOR A
29. 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 PCM, then clean the throttle body (see «THROTTLE BODY TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ), 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.
30. Reconnect all connectors.
31. Update the PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
32. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VEHICLE SPEED APP SENSOR A
33. 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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 33

Scheme 34

Scheme 35

Scheme 36

Scheme 37

Scheme 38

Scheme 39

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 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 PCM connector B (49P).
9. Check for continuity between PCM connector terminal B33 and throttle body 6P connector terminal No. 4. Is there continuity? YES -Go to step 10. NO -Repair an open in the wire between the throttle body and the PCM (B33), then go to step 18 .
10. Disconnect PCM connector C (49P).
11. Check for continuity between throttle body 6P connector terminals No. 5 and No. 6. Is there continuity? YES -Repair a short in the wires between throttle body 6P connector terminals No. 5 (ETCS-line) and No. 6 (ETCS+ line), then go to step 18 . NO -Go to step 12.
12. Check for continuity between body ground and throttle body 6P connector terminals No. 5 and No. 6 individually. Is there continuity? YES -Repair a short in the wire between the throttle body 6P connector and body ground, then go to step 18 . NO -Go to step 13.
13. 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 14. NO -Go to step 17 .
14. Connect throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.
15. Check for continuity between PCM connector terminals C2 and C3. Is there continuity? YES -Go to step 16. NO -Repair an open in the wires between the throttle body and the PCM (C2, C3), then go to step 18 .
16. 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 17. NO -Go to step 26 .
17. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
18. Reconnect all connectors.
19. Turn the ignition switch to ON (II).
20. Reset the PCM with the HDS.
21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
22. Turn the ignition switch to LOCK (0).
23. Turn the ignition switch to ON (II).
24. Slowly press the accelerator pedal to the floor.
25. 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 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.
26. Reconnect all connectors.
27. Update the PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
28. Turn the ignition switch to LOCK (0).
29. Turn the ignition switch to ON (II).
30. Slowly press the accelerator pedal to the floor.
31. 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 28 . If the PCM was substituted, go to step 1. NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__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 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

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 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 PCM connector A (49P).
10. Check for continuity between APP sensor 6P connector terminal No. 1 and body ground. Is there continuity? YES -Repair a short in the wire between the 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 PCM connector terminal A18 and body ground. Is there continuity? YES -Go to step 13. NO -Repair an open in the wire between the PCM (A18) and the APP sensor, then go to step 24.
13. Reconnect 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 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 PCM connector terminal A24 and body ground. Is there continuity? YES -Go to step 30. NO -Repair an open in the wire between the PCM (A24) 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/Installation»(/acura/mdx/ii-2010-2013/remont/engine-control-systems/#electronic-throttle-control-system) ).
24. Reconnect all connectors.
25. Turn the ignition switch to ON (II).
26. Reset the PCM with the HDS.
27. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__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 47

Scheme 48

Scheme 49

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 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 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 PCM connector terminal A26 and body ground. Is there continuity? YES -Go to step 19 . NO -Repair an open in the wire between the PCM (A26) 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/Installation»(/acura/mdx/ii-2010-2013/remont/engine-control-systems/#electronic-throttle-control-system) ).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the PCM with the HDS.
17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__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 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

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 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 PCM connector A (49P).
10. Check for continuity between APP sensor 6P connector terminal No. 4 and body ground. Is there continuity? YES -Repair a short in the wire between the 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 PCM connector terminal A19 and body ground. Is there continuity? YES -Go to step 13. NO -Repair an open in the wire between the PCM (A19) and the APP sensor, then go to step 24 .
13. Reconnect 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 PCM connector A (49P).
20. Connect APP sensor 6P connector terminal No. 6 to body ground with a jumper wire.
21. Check for continuity between PCM connector terminal A25 and body ground. Is there continuity? YES -Go to step 30 . NO -Repair an open in the wire between the 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/Installation»(/acura/mdx/ii-2010-2013/remont/engine-control-systems/#electronic-throttle-control-system) ).
24. Reconnect all connectors.
25. Turn the ignition switch to ON (II).
26. Reset the PCM with the HDS.
27. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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 57

Scheme 58

Scheme 59

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 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 12 . NO -Go to step 7.
7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.
9. Disconnect 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 PCM connector terminal A27 and body ground. Is there continuity? YES -Go to step 19 . NO -Repair an open in the wire between the PCM (A27) 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/Installation»(/acura/mdx/ii-2010-2013/remont/engine-control-systems/#electronic-throttle-control-system) ).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the PCM with the HDS.
17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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

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

Scheme 60

Scheme 61

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 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/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__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 the 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 PCM connector B (49P).
12. Check for continuity between PCM connector terminals B17 and B26. 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 PCM connector terminals B17 and B26. Is there continuity? YES -Repair a short in the wires between PCM B17 (TPSA line) and B26 (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/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
17. Reconnect all connectors.
18. Turn the ignition switch to ON (II).
19. Reset the PCM with the HDS.
20. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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 62

Scheme 63

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 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 PCM connector A (49P).
9. Check for continuity between 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 PCM connector terminals A18 and A19. Is there continuity? YES -Repair a short in the wires between 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/Installation»(/acura/mdx/ii-2010-2013/remont/engine-control-systems/#electronic-throttle-control-system) ).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the PCM with the HDS.
17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 24 . If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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

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 64

Scheme 65

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 PCM, then clean the throttle body (see «THROTTLE BODY TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ).
6. Turn the ignition switch to LOCK (0).
7. Disconnect the intake air duct from the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__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 TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ), then go to step 21 . 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 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 PCM connector terminals C2 and C3. Is there continuity? YES -Go to step 27 . NO -Repair an open in the wires between the throttle body and the PCM (C2, C3), then go to step 20 .
18. Turn the ignition switch to LOCK (0).
19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system__throttle-body-removalinstallation) ).
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#idle-control-system__pcm-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 PCM, then clean the throttle body (see «THROTTLE BODY TEST»(/acura/mdx/ii-2010-2013/remont/mechanical/#intake-air-system) ), 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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
29. Turn the ignition switch to LOCK (0).
30. Turn the ignition switch to ON (II), and wait 10 seconds.
31. 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__pcm-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/Installation ).

Scheme 66

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 PCM. If it does not, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system__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 PCM if it does not have the latest software (see «KNOCK SENSOR REPLACEMENT»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#pgm-fi-system) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/mdx/ii-2010-2013/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), 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.

1. If it is 0 %, the APP sensor is OK.
2. If it is not 0 %, replace the accelerator pedal module (see «Accelerator Pedal Module Removal/Installation»(/acura/mdx/ii-2010-2013/remont/engine-control-systems/#electronic-throttle-control-system) ), then go to step 1 .

Scheme 67

1. Disconnect the APP sensor 6P connector (A).
2. Remove the accelerator pedal module (B). NOTE: The APP sensor is not available separately. Do not disassemble the accelerator pedal module.
3. Install the parts in the reverse order of removal.

See also:
• GENERAL TROUBLESHOOTING INFORMATION
• THROTTLE BODY REMOVAL/INSTALLATION
• PCM IDLE LEARN PROCEDURE
• KNOCK SENSOR REPLACEMENT
• SUBSTITUTING THE PCM
• PCM REPLACEMENT
• RELAY CONTROL MODULE TEST
• DTC B1065: RELAY CONTROL MODULE LOST COMMUNICATION WITH DRIVER'S MPCS UNIT (DRLOCKSW MESSAGE)
• THROTTLE BODY TEST
• DLC CIRCUIT TROUBLESHOOTING
• Accelerator Pedal Module Removal/Installation