P0AB8

DTC P0A16: Front Engine Mount Actuator Control Circuit High Current

DTC P0AB8: 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.
- Information marked with an asterisk (*) applies to rear 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 PA016 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 table).

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 resistance between front (rear)* active control engine mount (ACM) actuator 2P connector terminals No. 1 and No. 2

Is there about 075-1.15 Ohm?

YES - Replace the engine mount control unit, then go to step 14.

NO - Replace the front engine mount, or rear engine mount, 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. Programming and Relearning
18. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs with the HDS?

YES - If DTC P0A16 and/or P0AB8* are indicated, 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. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Troubleshooting is complete.