P15AB
DTC P15AB: Engine Mount Control Unit Power Source Circuit Low VoltageNOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
- If DTC P15AB is stored at the same time as DTC P16C5, troubleshoot DTC P16C5 first, then recheck for P15AB.
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, 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 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 G202.
8. Turn the ignition switch ON (II).
9. Check for poor connections at PCM connector E (31P) 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 19.
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 step16.
NO - Go to step 14.
14. Turn the ignition switch OFF.
15. Inspect the No. 18ACG (15 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Repair open in the wire between the No. 18 ACG (15 A) fuse and the engine mount control unit (No. 4), then go to step 19.
NO - Repair short in the wire between the No. 18 ACG (15 A) fuse and the engine mount control unit (No. 4). Also replace the No. 18ACG (15 A) fuse, then go to step 19.
16. Turn the ignition switch OFF.
17. Check for continuity between engine mount control unit 20P connector terminal No. 14 and body ground.
Is there continuity?
YES - Go to step 18.
NO - Repair open in the wire between the engine mount control unit (No.14)and G202,then go to step 19.
18. Check for continuity between engine mount control unit 20P connector terminals No. Band No. 17.
Is there continuity?
YES - Replace the engine mount control unit, then go to step 19.
NO - Repair open in the wire between the PCM (E15(E26)*) and the engine mount control unit (No. 5 (No. 7)*), then go to step 19.
*:CANL line
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. Programming and Relearning
23. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P15AB 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.
NO - Troubleshooting is complete.