Active Control Engine Management (Acm) System: Diagnosis Honda Pilot I рестайлинг

Diagnostic Trouble Codes Troubleshooting

DIAGNOSTIC TROUBLE CODES (DTC) LIST

DTC P0A14, P0AB6: Front/Rear Engine Mount Actuator Circuit Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Information marked with an asterisk (*) applies to rear active control engine mount (ACM) actuator.

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1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Do the VTEC TEST in the INSPECTION MENU with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0A14 and/or P0AB6 indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator.
5. Turn the ignition switch OFF.
6. Disconnect the front active control engine mount (ACM) actuator (rear active control engine mount (ACM) actuator)* 2P connector.
7. Disconnect the engine mount control unit 20P connector.
8. Turn the ignition switch ON (II).
9. Measure voltage between body ground and the appropriate engine mount control unit 20P connector terminal (see «DTC TROUBLESHOOTING TABLE»(ref-243332-S06341126002006082300000) ). DTC TROUBLESHOOTING TABLE DTC ACTIVE CONTROL ENGINE MOUNT (ACM) ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR P0AB6 Rear side No. 1 No. 1 GRN/BLK P0AB6 Rear side No. 2 No. 10 BLU/BLK P0AH Front side No. 1 No. 9 YEL/GRN P0AH Front side No. 2 No. 20 BLU Is there battery voltage? YES - Repair short to power in the wire between the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 13 . NO - Go to step 10 .
10. Turn the ignition switch OFF.
11. Check for continuity between engine mount control unit 20P connector terminals No. 9 (No. 1)* and No. 20 (No. 10)*. Is there continuity? YES - Repair short in the wire between the engine mount control unit No. 9 and No. 20 terminals (No. 1 and No. 10 terminals), then go to step 14 . NO - Go to step 12 .
12. Check the resistance between active control engine mount (ACM) actuator 2P connector terminals No. 1 and No. 2. Is there about 0.75-1.15 ohms? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 14 . NO - Replace the front engine mount (see «FRONT ENGINE MOUNT REPLACEMENT»(ref-243320-S21455371132006082300000) ) or rear engine mount (see «REAR ENGINE MOUNT REPLACEMENT»(ref-243320-S10564612192006082300000) )*, then go to step 14 .
13. Turn the ignition switch OFF.
14. Reconnect all connectors.
15. Turn the ignition switch ON (II).
16. Reset the PCM with the HDS.
17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
18. Do the VTEC TEST in the INSPECTION MENU with the HDS.
19. Check for Temporary DTCs or DTCs with the HDS. If DTC P0A14 and/or P0AB6* is indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

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

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Information marked with an asterisk (*) applies to rear active control engine mount (ACM) actuator.

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1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Wait 10 seconds.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0A15 and/or P0AB7* Indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator or the engine mount control unit and G503.
5. Turn the ignition switch OFF.
6. Disconnect the front (rear)* active control engine mount (ACM) actuator 2P connector.
7. Check the resistance between front (rear)* active control engine mount (ACM) actuator 2P connector terminals No. 1 and No. 2. Is there about 0.75-1.15 ohms? YES - Go to step 8 . NO - Replace the front engine mount (see «FRONT ENGINE MOUNT REPLACEMENT»(ref-243320-S21455371132006082300000) ) or rear engine mount (see «REAR ENGINE MOUNT REPLACEMENT»(ref-243320-S10564612192006082300000) )*, then go to step 13 .
8. Disconnect the engine mount control unit 20P connector.
9. Check for continuity between engine mount control unit 20P connector terminals No. 2 and No. 11 and body ground. Is there continuity? YES - Go to step 10 . NO - Repair open in the wire between the engine mount control unit (No. 2, No. 11) and the G503, then go to step 13 .
10. Check for continuity between body ground and the appropriate engine mount control unit (see «DTC P0A15 AND DTC P0AB7 TABLE»(ref-243332-S01193225842006082300000) ). DTC P0A15 AND DTC P0AB7 TABLE DTC ACTIVE CONTROL ENGINE MOUNT (ACM) ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR P0AB7 Rear side No. 1 No. 1 GRN/BLK P0AB7 Rear side No. 2 No. 10 BLU/BLK P0A15 Front side No. 1 No. 9 YEL/GRN P0A15 Front side No. 2 No. 20 BLU Is there continuity? YES - Repair short in the wire between the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 13 . NO - Go to step 11 .
11. Connect the appropriate active control engine mount (ACM) actuator 2P connector terminal to body ground with a jumper wire (see «DTC REFERENCE TABLE»(ref-243332-S39062244842006082300000) ). DTC REFERENCE TABLE DTC ACTIVE CONTROL ENGINE MOUNT (ACM) ACTUATOR TERMINAL WIRE COLOR P0AB7 Rear side No. 1 GRN/BLK P0AB7 Rear side No. 2 BLU/BLK 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 20P connector terminal (see «DTC REFERENCE TABLE»(ref-243332-S39021640092006082300000) ). DTC REFERENCE TABLE DTC ACTIVE CONTROL ENGINE MOUNT (ACM) ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR P0AB7 Rear side No. 1 No. 1 GRN/BLK P0AB7 Rear side No. 2 No. 10 BLU/BLK P0A15 Front side No. 1 No. 9 YEL/GRN P0A15 Front side No. 2 No. 20 BLU Is there continuity? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 13 . NO - Repair open in the wire between the engine mount control unit and active control engine mount (ACM) actuator, then go to step 13 .
13. Reconnect all connectors.
14. Turn the ignition switch ON (II).
15. Reset the PCM with the HDS.
16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
17. Let the engine idle 10 seconds.
18. Check for Temporary DTCs or DTCs with the HDS. If DTC P0A15 and/or P0AB7* are indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 1 . NO - Troubleshooting is complete. If any other temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P0A16, P0AB8: Front/Rear Engine Mount Actuator Control Circuit High Current

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Information marked with an asterisk (*) applies to rear active control engine mount (ACM) actuator.

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1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Wait 10 seconds.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0A16 and/or P0AB8* indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator.
5. Turn the ignition switch OFF.
6. Disconnect the appropriate active control engine mount (ACM) actuator 2P connector.
7. Disconnect the engine mount control unit 20P connector.
8. Turn the ignition switch ON (II).
9. Measure voltage between body ground and the appropriate engine mount control unit 20P connector terminal (see «DTC REFERENCE TABLE»(ref-243332-S09046207492006082300000) ). DTC REFERENCE TABLE DTC ACTIVE CONTROL ENGINE MOUNT (ACM) ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR P0AB8 Rear side No. 1 No. 1 GRN/BLK P0AB8 Rear side No. 2 No. 10 BLU/BLK P0A16 Front side No. 1 No. 9 YEL/GRN P0A16 Front side No. 2 No. 20 BLU Is there battery voltage? YES - Repair short to power in the wire between the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 13 . NO - Go to step 10 .
10. Turn the ignition switch OFF.
11. Check for continuity between engine mount control unit 20P connector terminals No. 9 (No. 1)* and No. 20 (No. 10)*. Is there continuity? YES - Repair short in the wire between the engine mount control unit No. 9 and No. 20 terminals (No. 1 and No. 10 terminals)*, then go to step 14 . NO - Go to step 12 .
12. Measure the resistance between front (rear)* active control engine mount (ACM) actuator 2P connector terminals No. 1 and No. 2. Is there about 0.75- 1.15 ohms? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 14 . NO - Replace the front engine mount (see «FRONT ENGINE MOUNT REPLACEMENT»(ref-243320-S21455371132006082300000) ), or rear engine mount (see «REAR ENGINE MOUNT REPLACEMENT»(ref-243320-S10564612192006082300000) )*, then go to step 14 .
13. Turn the ignition switch OFF.
14. Reconnect all connectors.
15. Turn the ignition switch ON (II).
16. Reset the PCM with the HDS.
17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
18. Check for Temporary DTCs or DTCs with the HDS. If DTC P0A16 and/or P0AB8* are indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and active control engine mount (ACM) actuator, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P15AB: Engine Mount Control Unit Power Source 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 ). If DTC P15AB is stored at the same time as DTC P16C5, troubleshoot DTC P16C5 first, then recheck for P15AB.

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1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS. Is DTC U0073 indicated? YES - Do the troubleshooting for the DTC U0073 (see «DTC U0073: F-CAN MALFUNCTION (BUS-OFF); DTC U0155: F-CAN MALFUNCTION (PCM-GAUGE CONTROL MODULE)»(ref-298125-S15406416652008091500000) ), then go to step 19 . NO - Go to step 3 .
3. Clear the DTC with the HDS.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON (II).
6. Check for DTCs with the HDS. Is DTC U1101 indicated? YES - Go to step 8 . NO - Go to step 7 .
7. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AB indicated? YES - Go to step 8 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the PCM, or the engine mount control unit and G503.
8. Turn the ignition switch ON (II).
9. Check for poor connections at PCM connector A (44P) and the engine mount control unit 20P connector. Are the connections OK? YES - Go to step 10 . NO - Repair the poor connections, then go to step 16 .
10. Turn the ignition switch OFF.
11. Disconnect the engine mount control unit 20P connector.
12. Turn the ignition switch ON (II).
13. Measure voltage between engine mount control unit 20P connector terminal No. 4 and body ground. Is there battery voltage? YES - Go to step 16 . NO - Go to step 14 .
14. Turn the ignition switch OFF.
15. Inspect the No. 9 BACK UP LIGHT, INSTRUMENT LIGHT (10A) fuse in the driver's under-dash fuse/relay box. Is the fuse OK? YES - Repair open in the wire between the No. 9 BACK UP LIGHT, INSTRUMENT LIGHT (10A) fuse and engine mount control unit (No. 4), then go to step 22 . NO - Repair short in the wire between the No. 9 BACK UP LIGHT, INSTRUMENT LIGHT (10A) fuse and engine mount control unit (No. 4). Also replace the No. 9 BACK UP LIGHT, INSTRUMENT LIGHT (10A) fuse, then go to step 22 .
16. Turn the ignition switch OFF.
17. Check for continuity between body ground and engine mount control unit 20P connector terminals No. 2, No. 11, and No. 14 individually. Is there continuity? YES - Go to step 20 . NO - Repair open in the wire between engine mount control unit (No. 2, No. 11, or No. 14) and G503, then go to step 22 .
18. Jump the SCS line with the HDS.
19. Disconnect the PCM connector A (44P)
20. Connect engine mount control unit 20P connector terminals No.5 and No.17* to body fround with a jumper wire.
21. Check for continuity between PCM connector terminals A36 and A1* and body ground individually. Is there continuity? YES - Replace the engine mount control unit (see «Engine Mount Vibration and Noise Inspection»(ref-243332-S19062393772006082300000) ), then go to step 22 . NO - Repair open in the wire between PCM (A36 (A1)*) and engine mount control unit (No. 5 (No. 17)*), then go to step 22 . *: CANL line
22. Reconnect all connectors.
23. Turn the ignition switch ON (II).
24. Reset the PCM with the HDS.
25. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
26. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AB 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 Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P15AC: Engine Mount Control Unit Internal Circuit Malfunction

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

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AC indicated? YES - Go to step 4 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator.
4. Turn the ignition switch OFF.
5. Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ).
6. Turn the ignition switch ON (II).
7. Reset the PCM with the HDS.
8. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
9. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AC indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P15AD: Engine Mount Control Unit Internal Circuit Malfunction

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

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AD indicated? YES - Go to step 4 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator.
4. Turn the ignition switch OFF.
5. Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ).
6. Turn the ignition switch ON (II).
7. Reset the PCM with the HDS.
8. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
9. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AD indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 7 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P15AE: Cylinder Pause Signal Malfunction

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

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1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Do the ACM ACTIVATION with VTEC in the INSPECTION MENU with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AE indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the rocker arm oil control solenoid (VTEC solenoid valve).
5. Turn the ignition switch OFF.
6. Jump the SCS line with the HDS.
7. Disconnect PCM connector A (44P).
8. Disconnect the engine mount control unit 20P connector.
9. Connect engine mount control unit 20P connector terminal No. 6 to body ground with a jumper wire.
10. Check for continuity between PCM connector terminal A3 and body ground. Is there continuity? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 11 . NO - Repair open in the wire between the PCM (A3) and the engine mount control unit (No. 6), then go to step 11 .
11. Reconnect all connectors.
12. Turn the ignition switch ON (II).
13. Reset the PCM with the HDS.
14. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
15. Do the VTEC TEST in the INSPECTION MENU with the HDS.
16. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AE indicated? YES - Check for poor connections or loose terminals at the PCM and the engine mount control unit, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P15AF: CMP Sensor Signal Malfunction

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 P0340 and/or P0344 is stored at the same time as DTC P15AF, troubleshoot DTC P0340 and/or P0344 first, then recheck for DTC P15AF.

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1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 10 seconds.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AF indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the PCM and the engine mount control unit.
5. Turn the ignition switch OFF.
6. Check for poor connections at the PCM connector A (44P) and the engine mount control unit 20P connector and C204. Are the connections OK? YES - Go to step 7 . NO - Repair the poor connections, then go to step 25 .
7. Disconnect the CMP sensor 3P connector.
8. Turn the ignition switch ON (II).
9. Measure voltage between engine mount control unit 20P connector terminal No. 15 and body ground. Is there about 5 V? YES - Go to step 10 . NO - Go to step 15 .
10. Turn the ignition switch OFF.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector A (44P).
13. Disconnect the engine mount control unit 20P connector.
14. Check for continuity between engine mount control unit 20P connector terminal No. 15 and body ground. Is there continuity? YES - Repair short in the wire between the engine mount control unit (No. 15) and the PCM (A27), then go to step 25 . NO - Go to step 30
15. Turn the ignition switch OFF.
16. Connect CMP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
17. Turn the ignition switch ON (II).
18. Measure voltage between engine mount control unit 20P 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-243332-S22140098562006082300000) ), then go to step 25 . NO - Go to step 19 .
19. Turn the ignition switch OFF.
20. Disconnect the engine mount control unit 20P connector.
21. Jump the SCS line with the HDS.
22. Disconnect PCM connector A (44P).
23. Connect engine mount control unit 20P connector terminal No. 15 to body ground with a jumper wire.
24. Check for continuity between PCM connector terminal A27 and body ground. Is there continuity? YES - Go to step 31 . NO - Repair open in the wire between the PCM (A27) and the engine mount control unit (No. 15), then go to step 25 .
25. Reconnect all connectors.
26. Turn the ignition switch ON (II).
27. Reset the PCM with the HDS.
28. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) (see ).
29. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AF indicated? YES - Check for poor connections or loose terminals at the PCM and the engine mount control unit, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .
30. Reconnect all connectors.
31. Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-243311-S19790429062006082300000) ), or substitute a known-good PCM (see «HOW TO SUBSTITUTE THE PCM»(ref-243311-S24543735662006082300000) ).
32. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15AF indicated? YES - Check for poor connections or loose terminals at the PCM and the engine mount control unit, then 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»(ref-298125-S08727755362008091500000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P15B0: CKP Sensor Signal Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see ). If DTC P0335 and/or P0339 is stored at the same time as DTC P0335, troubleshoot DTC P0335 and/or P0339 first, then recheck for DTC P15B0.

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1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 10 seconds.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15B0 indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the PCM and the engine mount control unit.
5. Turn the ignition switch OFF.
6. Check for poor connections at PCM connector A (44P) and the engine mount control unit 20P connector and C204. Are the connections OK? YES - Go to step 7 . NO - Repair the poor connections, then go to step 25 .
7. Disconnect CKP sensor A/B 6P connector (see «CKP SENSOR REPLACEMENT»(ref-298125-S05885482552008091500000) ).
8. Turn the ignition switch ON (II).
9. Measure voltage between engine mount control unit 20P connector terminal No. 16 and body ground. Is there about 5 V? YES - Go to step 10 . NO - Go to step 16 .
10. Turn the ignition switch OFF.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector A (44P).
13. Disconneconnect the engine mount control unit 20P connector.
14. Check for continuity between engine mount control unit 20P connector terminal No. 16 and body ground. Is there continuity? YES - Repair short in the wire between the PCM (A26) and the engine mount control unit (No. 16), then go to step 25 NO - Go to step 32
15. Turn the ignition switch OFF.
16. Connect CKP sensor 6P connector terminal No. 5 to body ground with a jumper wire.
17. Turn the ignition switch ON (II).
18. Measure voltage between engine mount control unit 20P connector terminal No. 16 and body ground. Is there about 0 V? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 25 . NO - Go to step 19 .
19. Turn the ignition switch ON (II).
20. Disconnect the engine mount control unit 20P connector.
21. Jump the SCS line with the HDS.
22. Disconnect PCM connector A (44P).
23. Connect engine mount control unit 20P connector terminal No. 16 to body ground with a jumper wire.
24. Check for continuity between PCM connector terminal A26 and body ground. Is there continuity? YES - Go to step 31 . NO - Repair open in the wire between the PCM (A26) and engine mount control unit (No. 16), then go to step 25 .
25. Reconnect all connectors.
26. Turn the ignition switch ON (II).
27. Reset the PCM with the HDS.
28. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
29. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P15B0 is indicated, check for poor connections or loose terminals at the engine mount control unit and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) . NO - Troubleshooting is complete.
30. Reconnect all connectors.
31. Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-243311-S19790429062006082300000) ), or substitute a known-good PCM (see «HOW TO SUBSTITUTE THE PCM»(ref-243311-S24543735662006082300000) ).
32. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15B0 indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the PCM, then 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»(ref-298125-S08727755362008091500000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P15B1: CMP Sensor/CKP Sensor Signal Incorrect Correlation

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 P0335, P0339, P0340 and/or P0344 is stored at the same time as DTC P15B1, troubleshoot DTC P0335, P0339, P0340 and/or P0344 first, then recheck for DTC P15B1. Information marked with an asterisk (*) applies to CKPOUT-CKP1 line.

Scheme 490

Scheme 491

Scheme 492

Scheme 493

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle for 20 minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15B1 indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at PCM and engine mount control unit.
5. Turn the ignition switch OFF.
6. Check for poor connections at the PCM connector A (44P) and engine mount control unit 20P connector and C204. Is the connection OK? YES - Go to step 7 . No - Repair the poor connections, then go to step 19 .
7. Turn the ignition switch OFF.
8. Disconnect the CMP sensor 3P connector.
9. Disconnect CKP sensor A/B 6P connector (see «CKP SENSOR REPLACEMENT»(ref-298125-S05885482552008091500000) ).
10. Disconnect the engine mount control unit 20P connector.
11. Turn the ignition switch ON (II).
12. Measure voltage between engine mount control unit 20P connector terminal No. 15 (No. 16) and body ground. Is there about 5 V? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 19 . NO - Go to step 13 .
13. Turn the ignition switch OFF.
14. Check for continuity between engine mount control unit 20P connector terminal No. 15 (No. 16) and body ground. Is there continuity? YES - Repair short in the wire between the PCM (A27 (A26)*) and engine mount control unit (No. 15 (No. 16)*), then go to step 19 . NO - Go to step 15 .
15. Jump the SCS line with the HDS.
16. Disconnect the PCM connector A (44P).
17. Connect engine mount control unit 20P connector terminal No. 15 (No. 16)' and body ground with the jumper wire.
18. Check for continuity between PCM connector terminal A27 (A26)' and body ground. Is there continuity? YES - Go to step 26 . NO - Repair open in the wire between the PCM (A27 (A26) and engine mount control unit (No. 15 (No. 16)"), then go to step 19 .
19. Reconnect all connectors.
20. Turn the ignition switch ON (II).
21. Reset the PCM with the HDS.
22. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
23. Test-drive the vehicle for 20 minutes in the range of the recorded freeze data.
24. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15B1 indicated? YES - Check for poor connections or loose terminals at the PCM and the engine mount control unit, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .
25. Reconnect all connectors.
26. Update the PCM if it does not have latest software, (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-243311-S19790429062006082300000) ) or substitute a known-good PCM (see «HOW TO SUBSTITUTE THE PCM»(ref-243311-S24543735662006082300000) ).
27. Test-drive the vehicle for 20minutes in the range of the recorded freeze data parameter. ENGINE SPEED VSS
28. Check for Temporary DTCs or DTCs with the HDS. Is DTC P15B1 indicated? YES - Check for poor connections or loose terminals at the PCM and engine mount control unit, then 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»(ref-298125-S08727755362008091500000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P16C4: Engine Mount Actuator Control Power Circuit Stuck OFF

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

Scheme 494

Scheme 495

Scheme 496

Scheme 497

Scheme 498

Scheme 499

1. Turn the ignition switch ON (II).
2. Clear the DTCs with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C4 indicated? YES - Go to step 4 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) control relay.
4. Turn the ignition switch OFF.
5. Inspect the No. 5 ACM (10 A) fuse in the under-hood auxiliary fuse box. Is the fuse OK? YES - Go to step 9 . NO - Go to step 6 .
6. Remove the driver's dashboard lower cover (see «INSTRUMENT PANEL REMOVAL/ INSTALLATION»(ref-243318-S41799567622006082300000) ), then remove the active control engine mount (ACM) control relay (A).
7. Disconnect the engine mount control unit 20P connector.
8. Check for continuity between body ground and engine mount control unit 20P connector terminals No. 3 and No. 12 individually. Is there continuity? YES - Repair short in the wire between the engine mount control unit (No. 3, No. 12) and active control engine mount (ACM) control relay. Also replace the No. 5 ACM (10 A) fuse, then go to step 20 . NO - Repair short in the wire between active control engine mount (ACM) control relay and the No. 5 ACM (10 A) fuse. Also replace the No. 5 ACM (10 A) fuse, then go to step 20 .
9. Remove the driver's dashboard lower cover (see «INSTRUMENT PANEL REMOVAL/ INSTALLATION»(ref-243318-S41799567622006082300000) ), then remove the active control engine mount (ACM) control relay (A).
10. Test the active control engine mount (ACM) control relay (see «POWER RELAY TEST»(ref-243309-S30998182412006082300000) ). Is the active control engine mount (ACM) control relay OK? YES - Go to step 11 . NO - Replace the active control engine mount (ACM) control relay, then go to step 20 .
11. Measure voltage between active control engine mount (ACM) control relay 4P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 12 . NO - Repair open in the wire between the active control engine mount (ACM) control relay and the No. 5 ACM (10 A) fuse, then go to step 20 .
12. Disconnect the engine mount control unit 20P connector.
13. Check for continuity between active control engine mount (ACM) control relay 4P connector terminal No. 2 and engine mount control unit 20P connector terminals No. 3 and No. 12 individually. Is there continuity? YES - Go to step 14 . NO - Repair open in the wire between the engine mount control unit (No. 3 (No. 12)) and active control engine mount (ACM) control relay, then go to step 20 .
14. Turn the ignition switch ON (II).
15. Measure voltage between active control engine mount (ACM) control relay 4P connector terminal No. 4 and body ground. Is there battery voltage? YES - Go to step 18 . NO - Go to step 16 .
16. Turn the ignition switch OFF.
17. Inspect the No. 9 IG METER (7.5 A) fuse in the driver's under-dash fuse/relay box. Is the fuse OK? YES - Repair open in the wire between the active control engine mount (ACM) control relay and the No. 9 IG METER (7.5 A) fuse, then go to step 20 . NO - Repair short in the wire between active control engine mount (ACM) control relay and the No. 9 IG METER (7.5 A) fuse. Also replace the No. 9 IG METER (7.5 A) fuse, then go to step 20 .
18. Turn the ignition switch OFF.
19. Check for continuity between engine mount control unit 20P connector terminal No. 8 and active control engine mount (ACM) control relay 4P connector terminal No. 3. Is there continuity? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 20 . NO - Repair open in the wire between the engine mount control unit (No. 8) and the active control engine mount (ACM) control relay, then go to step 20 .
20. Reconnect all connectors.
21. Turn the ignition switch ON (II).
22. Reset the PCM with the HDS.
23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
24. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P16C4 is indicated, check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) control relay, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P16C5: Engine Mount Actuator Control Power Circuit Stuck ON

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

Scheme 500

Scheme 501

1. Turn the ignition switch ON (II).
2. Check the VBACM and ACMRLY in the DATA LIST with the HDS. Is there battery voltage? YES - Go to step 4 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) control relay.
3. Remove the driver's dashboard lower cover (see «INSTRUMENT PANEL REMOVAL/INSTALLATION»(ref-243318-S41799567622006082300000) ), then remove the active control engine mount (ACM) control relay (A).
4. Test active control engine mount (ACM) control relay (see «POWER RELAY TEST»(ref-243309-S30998182412006082300000) ). Is the active control engine mount (ACM) control relay OK? YES - Go to step 5 . No - Replace the active control engine mount (ACM) control relay, then go to step 10 .
5. Turn the ignition switch OFF.
6. Disconnect the engine mount control unit 20P connector.
7. Measure voltage between body ground and engine mount control unit 20P connector terminals No. 3 and No. 12 individually. Is there battery voltage? YES - Repair short to power in the wire between the engine mount control unit (No. 3/No. 12) and the active control engine mount (ACM) control relay, then go to step 9 . NO - Go to step 8 .
8. Check for continuity between engine mount control unit 20P connector terminal No. 8 and body ground. Is there continuity? YES - Repair short in the wire between the engine mount control unit (No. 8) and active control engine mount (ACM) control relay, then go to step 9 . NO - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 9 .
9. Reconnect all connectors.
10. Turn the ignition switch ON (II).
11. Reset the PCM with the HDS.
12. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
13. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C5 indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) control relay, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P16C6: Engine Mount Actuator High Voltage During Function Test

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 P0A14, P0A16, P0AB6, P0AB8, P16C7, or P16C8 are stored at the same time as DTC P16C6, troubleshoot those DTCs first, then recheck for P16C6. Information marked with an asterisk (*) applies to the rear active control engine mount (ACM) actuator.

Scheme 502

Scheme 503

Scheme 504

1. Turn the ignition switch ON (II).
2. Clear the DTCs with the HDS.
3. Do the ACM ACTIVATION with VTEC in the INSPECTION MENU with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C6 indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator.
5. Turn the ignition switch OFF.
6. Disconnect both active control engine mount (ACM) actuator 2P connectors.
7. Disconnect the engine mount control unit 20P connector.
8. Turn the ignition switch ON (II).
9. Measure voltage between body ground and the appropriate engine mount control unit connector terminal (see table). DTC P16C6 TABLE ACTIVE CONTROL ENGINE MOUNT (ACM) ACTUATOR TERMINAL ENGINE MOUNT CONTROL UNIT TERMINAL WIRE COLOR Rear side No. 1 No. 1 GRN/BLK Rear side No. 2 No. 10 BLU/BLK Front side No. 1 No. 9 YEL/GRN Front side No. 2 No. 20 BLU Is there battery voltage? YES - Repair short to power in the wire between the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 13 . NO - Go to step 10 .
10. Turn the ignition switch OFF.
11. Check for continuity between engine mount control unit 20P connector terminals No. 9 (No. 1)* and No. 20 (No. 10)*. Is there continuity? YES - Repair short in the wire between the engine mount control unit No. 9 and No. 20 terminals (No. 1 and No. 10 terminals)', then go to step 14 . NO - Go to step 12 .
12. At the actuator side, measure resistance between active control engine mount (ACM) actuator 2P connector terminals No. 1 and No. 2. Is there about 0.75- 1.15 ohms? YES - Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ), then go to step 14 . NO - Replace the faulty engine mount, front engine mount (see «FRONT ENGINE MOUNT REPLACEMENT»(ref-243320-S21455371132006082300000) ), rear engine mount (see «REAR ENGINE MOUNT REPLACEMENT»(ref-243320-S10564612192006082300000) ).
13. Turn the ignition switch OFF.
14. Reconnect all connectors.
15. Turn the ignition switch ON (II).
16. Reset the PCM with the HDS.
17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
18. Do the ACM ACTIVATION with VTEC in the INSPECTION MENU with the HDS.
19. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C6 indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P16C7, P16C8: Rear/Front Engine Mount Actuator Control Circuit High Current

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Information marked with an asterisk (') applies to the front active control engine mount (ACM) actuator.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Wait 10 seconds.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C7 and/or P16C8' indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator.
5. Turn the ignition switch OFF.
6. Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ).
7. Turn the ignition switch ON (II).
8. Reset the PCM with the HDS.
9. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
10. Wait 10 seconds.
11. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C7 and/or P16C8* indicated? YES - Check for poor connections or loose terminals at the engine mount control unit and the active control engine mount (ACM) actuator, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

DTC P16C9: Engine Mount Control Unit Internal Circuit Malfunction

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

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Wait 10 seconds.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C9 indicated? YES - Go to step 5 . NO - Intermittent failure, system is OK at this time.
5. Turn the ignition switch OFF.
6. Replace the engine mount control unit (see «ENGINE MOUNT CONTROL UNIT REPLACEMENT»(ref-243332-S22140098562006082300000) ).
7. Turn the ignition switch ON (II).
8. Reset the PCM with the HDS.
9. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) ).
10. Wait 10 seconds.
11. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16C9 indicated? YES - Check for poor connections or loose terminals at the engine mount control unit, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) .

Engine Mount Vibration and Noise Inspection

1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS. If there are any Temporary DTCs or DTCs indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-243332-S33787529392006082300000) . If there are no Temporary DTCs or DTCs indicated, go to step 4 .
3. Clear the DTC with the HDS.
4. Open the engine hood.
5. Select ACM in the INSPECTION MENU with the HDS.
6. Feel the engine for vibration while you turn the engine mounts on and off with the HDS. If the engine move when you turn the engine mounts on and off, go to step 7 . If the engine does not move when you turn the engine mounts on and off, replace the corresponding engine mount, front engine mount (see «FRONT ENGINE MOUNT REPLACEMENT»(ref-243320-S21455371132006082300000) ), rear engine mount (see «REAR ENGINE MOUNT REPLACEMENT»(ref-243320-S10564612192006082300000) ).
7. Check for any of these conditions that may cause increased vibration and noise: Engine misfire Deformed radiator mounting parts (brackets upper cushions, or lower cushions) Loose bumper beam Looseness, deformation, or tears in the rubber portion of the engine or transmission mounts Loose, damaged, or interfering from exhaust system parts Collision damage to the frame or undercarriage Abnormal wear of tires Loose or damaged suspension parts Wheel alignment out of specification

Scheme 505

1. Remove the passenger's console side trim (see «CENTER CONSOLE REMOVAL/INSTALLATION»(ref-243337-S13673740122006082300000) ).
2. Disconnect the engine mount control unit 20P connector (A).
3. Remove the bolts and the engine mount control unit (B).
4. Install the engine mount control unit in the reverse order of removal.