Active Control Engine Mount (Acm) System (V6): Diagnosis Honda Accord VIII

DTC Clear

1. Clear the DTC with the HDS while the engine is stopped.
2. Turn the ignition switch to LOCK (0).
3. Turn the ignition switch to ON (II), and wait 30 seconds.
4. Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.

DTC Troubleshooting Index

DTC TROUBLESHOOTING INDEX

DTC P0A14: Front Engine Mount Actuator Circuit Malfunction; DTC P0AB6: Rear Engine Mount Actuator Circuit Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshots, and review the general troubleshooting information (see DTC CLEAR ). Information marked with an asterisk (*) applies to the rear engine mount actuator. When testing the engine mount actuator, be sure to use a Digital volt/ohm meter (DVOM) capable of reading 0.01 ohms change of resistance. Be sure to zero the meter before checking the engine mount actuator. If the vehicle has been driven, allow the engine mount actuator to cool down for about 2 hours before testing.

Scheme 13

Scheme 14

Scheme 15

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS (see «HDS CLEAR COMMAND»(ref-423708-S15183142662011092800000) ).
3. Start the engine, and let it idle 20 seconds.
4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0A14 and/or P0AB6* 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 engine mount control unit and the engine mount actuator.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the front engine mount actuator (rear engine mount actuator)* 2P connector.
7. Disconnect the engine mount control unit 16P connector.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between body ground and the appropriate engine mount control unit 16P connector terminal (see table). DTC ENGINE MOUNT REFERENCE CHART DTC ENGINE MOUNT ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR P0AB6 Rear side No. 1 No. 9 GRN P0AB6 Rear side No. 2 No. 8 WHT P0A14 Front side No. 1 No. 16 YEL/GRN P0A14 Front side No. 2 No. 2 BLU Is there battery voltage? YES -Repair a short to power in the wire between the engine mount control unit and the engine mount actuator, then go to step 13 . NO -Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Check for continuity between engine mount control unit 16P connector terminals No. 2 and No. 16 (No. 8 and No. 9)". Is there continuity? YES -Repair short in the wire(s) between engine mount control unit 16P connector terminal No. 2 and No. 16 (No. 8 and No. 9)*, then go to step 14 . NO -Go to step 12.
12. At the engine mount actuator side, measure the resistance between front engine mount actuator (rear engine mount actuator)* 2P connector terminals No. 1 and No. 2. NOTE: Zero-out the meter before testing to adjust the meter to the test leads. Is there about 0.48-0.54 ohms (68°F/20°C)? YES -Check for poor connections or loose terminals at the engine mount control unit and the engine mount actuator. If it is OK, replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ), then go to step 14 . NO -Replace the front engine mount (see «FRONT ENGINE MOUNT REMOVAL AND INSTALLATION»(ref-423707-S08595473222011092800000) ), or the rear engine mount (see «REAR ENGINE MOUNT REMOVAL AND INSTALLATION»(ref-423707-S09511596972011092800000) ), then go to step 14 .
13. Turn the ignition switch to LOCK (0).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
17. Start the engine, and let it idle 20 seconds.
18. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0A14 and/or P0AB6" indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the engine mount actuator, 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»(ref-423708-S16687259482011092800000) .

DTC P0A15: Front Engine Mount Actuator Control Circuit Low Current; DTC P0AB7: Rear Engine Mount Actuator Control Circuit Low Current

Note. Before you troubleshoot, record all freeze data and any on-board snapshots, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Information marked with an asterisk (*) applies to the rear engine mount actuator. When testing the engine mount actuator, be sure to use a Digital volt/ohm meter (DVOM) capable of reading 0.01 ohms change of resistance. Be sure to zero the meter before checking the engine mount actuator. If the vehicle has been driven, allow the engine mount actuator to cool down for about 2 hours before testing.

Scheme 16

Scheme 17

Scheme 18

Scheme 19

Scheme 20

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
3. Start the engine, and let it idle 20 seconds.
4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0A15 and/or P0AB7 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 engine mount control unit and the engine mount actuator, the engine mount control unit, and body ground G302.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the front engine mount actuator (rear engine mount actuator)* 2P connector.
7. At the engine mount actuator side, measure the resistance between front engine mount actuator (rear engine mount actuator)* 2P connector terminals No. 1 and No. 2. NOTE: Zero-out the meter before testing to adjust the meter to the test leads. Is there about 0.48-0.54 ohms (68°F 120°C)? YES -Go to step 8. NO -Replace the front engine mount (see «FRONT ENGINE MOUNT REMOVAL AND INSTALLATION»(ref-423707-S08595473222011092800000) ) or the rear engine mount (see «REAR ENGINE MOUNT REMOVAL AND INSTALLATION»(ref-423707-S09511596972011092800000) ), then go to step 13 .
8. Disconnect the engine mount control unit 16P connector.
9. Check for continuity between engine mount control unit 16P connector terminal No. 1 and body ground. Is there continuity? YES -Go to step 10. NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 1 and body ground G302, then go to step 13 .
10. Check for continuity between body ground and the appropriate engine mount control unit 16P connector terminal (see table). DTC ENGINE MOUNT REFERENCE CHART DTC ENGINE MOUNT ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR P0AB7 Rear side No. 1 No. 9 GRN P0AB7 Rear side No. 2 No. 8 WHT P0A15 Front side No. 1 No. 16 YEL/GRN P0A15 Front side No. 2 No. 2 BLU Is there continuity? YES -Repair a short to ground in the wire between the engine mount control unit and the engine mount actuator, then go to step 13 . NO -Go to step 11.
11. Connect the appropriate front engine mount actuator (rear engine mount actuator)* 2P connector terminal to body ground with a jumper wire (see table). DTC ENGINE MOUNT REFERENCE CHART DTC ENGINE MOUNT ACTUATOR TERMINAL WIRE COLOR P0AB7 Rear side No. 1 GRN P0AB7 Rear side No. 2 WHT P0A15 Front side No. 1 YEL/GRN P0A15 Front side No. 2 BLU
12. Check for continuity between body ground and the appropriate engine mount control unit 16P connector terminal (see table). DTC ENGINE MOUNT REFERENCE CHART DTC ENGINE MOUNT ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR P0AB7 Rear side No. 1 No. 9 GRN P0AB7 Rear side No. 2 No. 8 WHT P0A15 Front side No. 1 No. 16 YEL/GRN P0A15 Front side No. 2 No. 2 BLU Is there continuity? YES -Check for poor connections or loose terminals at the engine mount control unit and the engine mount actuator. If it is OK, replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ), then go to step 13. NO -Repair an open in the wire between the engine mount control unit and the engine mount actuator, then go to step 13.
13. Reconnect all connectors.
14. Turn the ignition switch to ON (II).
15. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
16. Start the engine, and let it idle 20 seconds.
17. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0A15 and/or P0AB7" indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the engine mount actuator, 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»(ref-423708-S16687259482011092800000) .

DTC P15AB: Engine Mount Control Unit Power Source Circuit Low Voltage

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

Scheme 21

Scheme 22

1. Turn the ignition switch to ON (II).
2. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16C5 indicated? YES -Do the troubleshooting for the DTC P16C5 (see «DTC P16C5: ENGINE MOUNT ACTUATOR CONTROL POWER CIRCUIT STUCK ON»(ref-423708-S22696093012011092800000) ). NO -Go to step 3.
3. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
4. Start the engine, and let it idle 10 seconds.
5. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15AB 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 engine mount control unit and the body ground G302.
6. Turn the ignition switch to LOCK (0).
7. Inspect the No. 7 ACG (15 A) fuse in the driver's under-dash fuse/relay box. Is the fuse OK? YES -Go to step 8. NO -Repair a short to ground in the wire between the No. 7 ACG (15 A) fuse and engine mount control unit 16P connector terminal No. 5. Also replace the No. 7 ACG (15 A) fuse, then go to step 14 .
8. Check for poor connections or loose terminals at the engine mount control unit 16P connector. Are the connections and the terminals OK? YES -Go to step 9. NO -Repair the connections or the terminals, then go to step 14 .
9. Disconnect the engine mount control unit 16P connector.
10. Turn the ignition switch to ON (II).
11. Measure the voltage between engine mount control unit 16P connector terminal No. 5 and body ground. Is there battery voltage? YES -Go to step 12. NO -Repair an open in the wire between the No. 7 ACG (15 A) fuse and engine mount control unit 16P connector terminal No. 5. Turn the ignition switch to LOCK (0), then go to step 14 .
12. Turn the ignition switch to LOCK (0).
13. Check for continuity between engine mount control unit 16P connector terminal No. 3 and body ground. Is there continuity? YES -Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ), then go to step 14. NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 3 and body ground G302, then go to step 14.
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
17. Start the engine, and let it idle 10 seconds.
18. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15AB indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and body ground G302, then recheck. If the symptom still does not go away, replace the engine mount control unit. NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-423708-S16687259482011092800000) .

DTC P15AE: Cylinder Pause Signal 1 Malfunction ('08-10 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshots, 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 (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
3. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 3 CYLINDER ACTIVATION TEST with the HDS.
4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15AE 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 engine mount control unit and the PCM.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the engine mount control unit 16P connector.
7. Turn the ignition switch to ON (II).
8. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 3 CYLINDER ACTIVATION TEST with the HDS.
9. Measure the voltage between engine mount control unit 16P connector terminal No. 6 and body ground during 3 cylinder pause mode. Is there battery voltage? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If it is OK, replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ). Turn the ignition switch to LOCK (0), then go to step 16 . NO -Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Jump the SCS line with the HDS. NOTE: This step must be done to protect the PCM from damage.
12. Disconnect PCM connector A (49P).
13. Check for continuity between engine mount control unit 16P connector terminal No. 6 and body ground. Is there continuity? YES -Repair a short to ground in the wire between engine mount control unit 16P connector terminal No. 6 and PCM connector terminal A14, then go to step 16 . NO -Go to step 14.
14. Connect engine mount control unit 16P connector terminal No. 6 to body ground with a jumper wire.
15. Check for continuity between PCM connector terminal A14 and body ground. Is there continuity? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If it is OK, go to step 21 . NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 6 and PCM connector terminal A14, then go to step 16.
16. Reconnect all connectors.
17. Turn the ignition switch to ON (II).
18. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
19. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 3 CYLINDER ACTIVATION TEST with the HDS.
20. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15AE indicated? YES -Check for poor connections or loose terminals at the engine mount control unit 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»(ref-423708-S16687259482011092800000) .
21. Reconnect all connectors.
22. Update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-423675-S07984033632011092800000) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ).
23. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 3 CYLINDER ACTIVATION TEST with the HDS.
24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15AE indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ), and retest. If the PCM was substituted and the symptom indicated goes away, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-423708-S16687259482011092800000) .

DTC P15B0: CKP Sensor Signal Malfunction; DTC P15C0: CKP Sensor Signal Intermittent Interruption

Note. Before you troubleshoot, record all freeze data and any on-board snapshots, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If PGM-FI system's DTC P0335 and/or P0339 is stored at the same time as DTC P15B0 and/or P15C0, troubleshoot P0335 and/or P0339 first, then recheck for P15B0 and/or P15C0.

Scheme 27

Scheme 28

Scheme 29

Scheme 30

Scheme 31

Scheme 32

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
3. Start the engine, and let it idle 20 seconds.
4. Check for pending or Confirmed DTCs with the HDS. Is DTC P15B0 and/or P15C0 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 engine mount control unit and the PCM.
5. Turn the ignition switch to LOCK (0).
6. Check for poor connections or loose terminals at the engine mount control unit 16P connector and PCM connector A (49P). Are the connections and terminals OK? YES -Go to step 7. NO -Repair the connections or terminals, then go to step.
7. Disconnect CKP sensor 3P connector.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between engine mount control unit 16P connector terminal No. 15 and body ground. Is there about 5 V? YES -Go to step 10. NO -Go to step 20 .
10. Turn the ignition switch to LOCK (0).
11. Connect CKP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
12. Turn the ignition switch to ON (II).
13. Measure the voltage between engine mount control unit 16P connector terminal No. 15 and body ground. Is there about 0 V? YES -Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ). Turn the ignition switch to LOCK (0), then go to step. NO -Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Remove the jumper wire from the CKP sensor 3P connector.
16. Jump the SCS line with the HDS. NOTE: This step must be done to protect the PCM from damage.
17. Disconnect PCM connector A (49P).
18. Turn the ignition switch to ON (II).
19. Measure the voltage between PCM connector terminal A34 and body ground. Is there about 5 V? YES -Turn the ignition switch to LOCK (0), then go to step. NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 15 and PCM connector terminal A34. Turn the ignition switch to LOCK (0), then go to step.
20. Turn the ignition switch to LOCK (0).
21. Jump the SCS line with the HDS. NOTE: This step must be done to protect the PCM from damage.
22. Disconnect PCM connector A (49P).
23. Turn the ignition switch to ON (II).
24. Measure the voltage between engine mount control unit 16P connector terninal No. 15 and body ground. Is there continuity? YES -Go to step 23. NO -Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ), then go to step 26 .
25. Turn teh ignition switch to LOCK (0).
26. Disconnect the engine mount control unit 16P
27. Check for continuity between engine mount control unit 16P connector terminal No. 15 and body ground. Is there continuity? YES -Repair a short to ground in the wire between engine mount control unit 16P connector terminal No. 15 and PCM connector terminal A34, then go to step 28. NO -Go to step 31 .
28. Reconnect all connectors.
29. Turn the ignition switch to ON (II).
30. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
31. Start the engine, and let it idle 20 seconds.
32. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15B0 and/or P15C0 indicated? YES -Check for poor connections or loose terminals at the engine mount control unit 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»(ref-423708-S16687259482011092800000) .
33. Reconnect all connectors.
34. Update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-423675-S07984033632011092800000) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ).
35. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15B0 and/or P15C0 indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If the PCM was updated, substituted a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ), and retest. If the PCM was substituted and the symptom indicated goes away, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-423708-S16687259482011092800000) .

DTC P15BD: Cylinder Pause Signal 2 Malfunction ('08-10 models)

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

Scheme 33

Scheme 34

Scheme 35

Scheme 36

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
3. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 4 CYLINDER ACTIVATION TEST with the HDS.
4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15BD 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 engine mount control unit and the PCM.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the engine mount control unit 16P connector.
7. Turn the ignition switch to ON (II).
8. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 4 CYLINDER ACTIVATION TEST with the HDS.
9. Measure the voltage between engine mount control unit 16P connector terminal No. 4 and body ground during 2 cylinder pause mode. Is there battery voltage? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If it is OK, replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ). Turn the ignition switch to LOCK (0), then go to step 16 . NO -Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Jump the SCS line with the HDS. NOTE: This step must be done to protect the PCM from damage.
12. Disconnect PCM connector A (49P).
13. Check for continuity between engine mount control unit 16P connector terminal No. 4 and body ground. Is there continuity? YES -Repair a short to ground in the wire between connector terminal engine mount control unit 16P connector terminal No. 4 and PCM connector terminal A15, then go to step 16 . NO -Go to step 14.
14. Connect engine mount control unit 16P connector terminal No. 4 to body ground with a jumper wire.
15. Check for continuity between PCM connector terminal A15 and body ground. Is there continuity? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If it is OK, go to step 21 . NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 4 and PCM connector terminal A15, then go to step 16.
16. Reconnect all connectors.
17. Turn the ignition switch to ON (II).
18. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
19. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 4 CYLINDER ACTIVATION TEST with the HDS.
20. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15BD indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to indicated «DTC'S TROUBLESHOOTING»(ref-423708-S16687259482011092800000) .
21. Reconnect all connectors.
22. Update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-423675-S07984033632011092800000) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ).
23. Select the VTEC TEST in the PGM-FI INSPECTION menu, and do the VPS TEST of the 4 CYLINDER ACTIVATION TEST with the HDS.
24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15BD indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ), and retest. If the PCM was substituted and the symptom indicated goes away, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-423708-S16687259482011092800000) .

DTC P15BE: CMP Sensor Signal Malfunction; DTC P15BF: CMP Sensor Signal Intermittent Interruption

Note. Before you troubleshoot, record all freeze data and any on-board snapshots, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If PGM-FI system's DTC P0365 and/or P0369 is stored at the same time as DTC P15BE and/or P15BF, troubleshoot P0365 and/or P0369 first, then recheck for P15BE and/or P15BF. Information marked with an asterisk (*) applies to '10-11 models.

Scheme 37

Scheme 38

Scheme 39

Scheme 40

Scheme 41

Scheme 42

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
3. Start the engine, and let it idle 20 seconds.
4. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15BE and/or P15BF 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 engine mount control unit and the PCM.
5. Turn the ignition switch to LOCK (0).
6. Check for poor connections or loose terminals at the engine mount control unit 16P connector and PCM connector A (49P). Are the connections and terminals OK? YES -Go to step 7. NO -Repair the connections or terminals, then go to step 28.
7. Disconnect CMP sensor 3P connector.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between engine mount control unit 16P connector terminal No. 7 and body ground. Is there about 5 V? YES -Go to step 10. NO -Go to step 20 .
10. Turn the ignition switch to LOCK (0).
11. Connect CMP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
12. Turn the ignition switch to ON (II).
13. Measure the voltage between engine mount control unit 16P connector terminal No. 7 and body ground. Is there about 0 V? YES -Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ). Turn the ignition switch to LOCK (0), the go to step 26 . NO -Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Remove the jumper wire from the CMP sensor 3P connector.
16. Jump the SCS line with the HDS. NOTE: This step must be done to protect the PCM from damage.
17. Disconnect PCM connector A (49P).
18. Turn the ignition switch to ON (II).
19. Measure the voltage between PCM connector terminal A35 and body ground. Is there about 5 V? YES -Turn the ignition switch to LOCK (0), then go to step 33. NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 7 and PCM connector terminal A35. Turn the ignition switch to LOCK (0), then go to step 28.
20. Turn the ignition switch to LOCK (0).
21. Jump the SCS line with the HDS.Disconnect the engine mount control unit 16P connector. NOTE: This step must be done to protect the PCM from damage.
22. Disconnect PCM connector A (49P).Check for continuity between engine mount control unit 16P connector terminal No. 7 and body ground.
23. Turn the ignition switch to ON (II).
24. Measure the voltage between engine mount control unit 16P connector terminal No. 7 and body ground. Is there about 5V? YES -Turn the ignition switch to LOCK (0), go to step 33. NO -Go to step 25.
25. Turn the ignition switch to LOCK (0)
26. Disconnect the engine mount control unit 16P connector.
27. Check for continuity between engine mount control unit 16P connector terminal No. 7 and body ground. Is there continuity? YES -Repair a short to ground in the wire between engine mount control unit 16P connector terminal No. 7 and PCM connector terminal A35, then go to step 26. NO -Go to step 28.
28. Reconnect all connectors.
29. Turn the ignition switch to ON (II).
30. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
31. Start the engine, and let it idle 20 seconds.
32. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15BE and/or P15BF indicated? YES -Check for poor connections or loose terminals at the engine mount control unit 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»(ref-423708-S16687259482011092800000) .
33. Reconnect all connectors.
34. Update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-423675-S07984033632011092800000) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ).
35. Check for Pending or Confirmed DTCs with the HDS. Is DTC P15BE and/or P15BF indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the PCM. If the PCM was updated, substituted a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-423698-S03157902762011092800000) ), and retest. If the PCM was substituted and the symptom indicated goes away, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-423675-S30806157422011092800000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-423708-S16687259482011092800000) .

DTC P16C4: Engine Mount Actuator Control Power Circuit Stuck OFF

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

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

Scheme 48

Scheme 49

1. Turn the ignition switch to ON (II).
2. Check the ACM UNIT SUPPLY VOLTAGE in the DATA LIST with the HDS. Is there battery voltage? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the driver's under-dash fuse/relay box (active control engine mount (ACM) control relay). NO -Go to step 3.
3. Turn the ignition switch to LOCK (0).
4. Inspect the No. 14 ACM (10 A) fuse in the driver's under-dash fuse/relay box. Is the fuse OK? YES -Go to step 9 . NO -Go to step 5.
5. Remove the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(ref-423709-S23027057072011092800000) ).
6. Disconnect driver's under-dash fuse/relay box connector G(13P).
7. Disconnect the engine mount control unit 16P connector.
8. Check for continuity between engine mount control unit 16P connector terminal No. 10 and body ground. Is there continuity? YES -Repair a short to ground in the wire between engine mount control unit 16P connector terminal No. 10 and the driver's under-dash fuse/relay box (ACM control relay). Also replace the No. 14 ACM (10 A) fuse, then go to step 25 . NO -Check the driver's under-dash fuse/relay box, and replace it if needed. Also replace the No. 14 ACM (10 A) fuse, then go to step 25 .
9. Remove the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(ref-423709-S23027057072011092800000) ).
10. Disconnect the engine mount control unit 16P connector.
11. Turn the ignition switch to ON (II).
12. Measure the voltage between engine mount control unit 16P connector terminal No. 10 and body ground. Is there battery voltage? YES -Go to step 16 . NO -Go to step 13.
13. Turn the ignition switch to LOCK (0).
14. Disconnect driver's under-dash fuse/relay box connector G (13P).
15. Check for continuity between engine mount control unit 16P connector terminal No. 11 and driver's under-dash fuse/relay box connector G (13P) terminal No. 4. Is there continuity? YES -Replace the driver's under-dash fuse/relay box; USA models (see «DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL AND INSTALLATION»(ref-423710-S13284333742011092800000) ), Canada models (see «CANADA MODELS»(ref-423710-S16150183142011092800000) ), then go to step 25 . NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 11 and driver's under-dash fuse/relay box connector G terminal No. 4, then go to step 25 .
16. Turn the ignition switch to LOCK (0).
17. Connect engine mount control unit 16P connector terminal No. 11 and body ground with a jumper wire.
18. Turn the ignition switch to ON (II).
19. Measure the voltage between engine mount control unit 16P connector terminal No. 10 and body ground. Is there battery voltage? YES -Go to step 23 . NO -Go to step 20.
20. Turn the ignition switch to LOCK (0).
21. Disconnect driver's under-dash fuse/relay box connector G (13P).
22. Check for continuity between engine mount control unit 16P connector terminal No. 10 and driver's under-dash fuse/relay box connector G (13P) terminal No. 8. Is there continuity? YES -Replace the driver's under-dash fuse/relay box; USA models (see «DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL AND INSTALLATION»(ref-423710-S13284333742011092800000) ), Canada models (see «CANADA MODELS»(ref-423710-S16150183142011092800000) ), then go to step 25 . NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 10 and driver's under-dash fuse/relay box connector G terminal No. 8, then go to step 25 .
23. Turn the ignition switch to LOCK (0).
24. Check for continuity between engine mount control unit 16P connector terminal No. 1 and body ground. Is there continuity? YES -Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ), then go to step 25. NO -Repair an open in the wire between engine mount control unit 16P connector terminal No. 1 and body ground G302, then go to step 25.
25. Reconnect all connectors.
26. Turn the ignition switch ON (II).
27. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
28. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16C4 indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the driver's under-dash fuse/relay box (ACM control relay), 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»(ref-423708-S16687259482011092800000) .

DTC P16C5: Engine Mount Actuator Control Power Circuit Stuck ON

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

Scheme 50

Scheme 51

Scheme 52

1. Turn the ignition switch to ON (II).
2. Check the ACM UNIT SUPPLY VOLTAGE and ACM RELAY CONTROL in the DATA LIST with the HDS. Does the ACM UNIT SUPPLY VOLTAGE Indicate battery voltage when the ACM RELAY CONTROL indicates OFF? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the driver's under-dash fuse/relay box (active control engine mount (ACM) control relay).
3. Turn the ignition switch to LOCK (0).
4. Disconnect driver's under-dash fuse/relay box connector G(13P).
5. Disconnect the engine mount control unit 16P connector.
6. Check for continuity between engine mount control unit 16P connector terminal No. 11 and body ground. Is there continuity? YES -Repair a short to ground in the wire between engine mount control unit 16P connector terminal No. 11 and driver's under-dash fuse/relay box connector G (13P) terminal No. 4, then go to step 12 . NO -Go to step 7.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between engine mount control unit 16P connector terminal No. 10 and body ground. Is there battery voltage? YES -Repair a short to power in the wire between engine mount control unit 16P connector terminal No. 10 and driver's under-dash fuse/relay box connector G (13P) terminal No. 8, then go to step 12 . NO -Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Reconnect driver's under-dash fuse/relay box connector G (13P).
11. Measure the voltage between engine mount control unit 16P connector terminal No. 10 and body ground. Is there battery voltage? YES -Replace the driver's under-dash fuse/relay box, then go to step 12. NO -Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-423708-S21175949822011092800000) ), then go to step 12.
12. Reconnect all connectors.
13. Turn the ignition switch to ON (II).
14. Clear the DTC with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
15. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16C5 indicated? YES -Check for poor connections or loose terminals at the engine mount control unit and the driver's under-dash fuse/relay box (ACM control relay), 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»(ref-423708-S16687259482011092800000) .

DTC P16C6: Engine Mount Actuator High Voltage During Function Test

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

1. Turn the ignition switch to ON (II).
2. Clear the DTCs with the HDS (see «DTC CLEAR»(ref-423708-S32759314642011092800000) ).
3. Start the engine, and let it idle 20 seconds.
4. Check for Pending or Confirmed DTCs with the HDS. Are any Pending or Confirmed DTCs indicated? YES -Go to the indicated «DTC'S TROUBLESHOOTING»(ref-423708-S16687259482011092800000) . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit, the engine mount actuator, and body ground G302.