U0164

DTC U0164: IMA-CAN Malfunction (A/C compressor driver-PCM)

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the 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 U0164 indicated?

YES - Go to step 4.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MCM, the A/C compressor driver and the PCM.

4. Check for Temporary DTCs or DTCs with the HDS again.

Are DTC U0037 and U0164 indicated at the same time?

YES - Go to troubleshooting DTC U0037.

NO - Go to step 5.

5. Check for Temporary DTCs or DTCs with the HDS again.

Are DTC U0110, U0164 and U1201 indicated at the same time?

YES - Go to troubleshooting DTC U0110., or DTC U 1201.

NO - Go to step 6.

6. Check the No. 29 (7.5 A) fuse in under-dash fuse/relay box.

Is the fuse blown?

YES - Repair short in the wire the A/C compressor driver and the No. 29 (7.5 A) fuse. Also replace the No. 29 (7.5 A) fuse, then go to step 17.

NO - Go to step 7.

7. Turn the ignition switch OFF.
8. Remove the IPU lid.
9. Disconnect MCM connector A (31P).
10. Disconnect the A/C compressor driver 4P connector.




11. Check for continuity between MCM connector terminal A7 and A/C compressor driver 4P connector terminal No. 2.

Is there continuity?

YES - Go to step 12.

NO - Repair open in the wire between the MCM (A7) and the A/C compressor driver, then go to step 18.




12. Check for continuity between MCM connector terminal A6 and A/C compressor driver 4P connector terminal No. 3.

Is there continuity?

YES - Go to step 13.

NO - Repair open in the wire between the MCM (A6) and the A/C compressor driver, then go to step 18.

13. Turn the ignition switch ON (II).




14. Measure voltage between A/C compressor driver 4P connector terminal No. 4 and body ground.

Is there battery voltage9

YES - Go to step 15.

NO - Repair open in the wire between the A/C compressor driver and the No. 29 (7.5 A) fuse, then go to step 18.

15. Turn the ignition switch OFF.




16. Check for continuity between A/C compressor driver 4P connector terminal No. 1 and body ground.

Is there continuity?

YES - Go to step 17.

NO - Repair open in the wire between the A/C compressor driver and G651, then go to step 18.

17. Replace the A/C compressor driver.
18. Turn the ignition switch OFF.
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.
23. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC U0164 is indicated, check for poor connections or loose terminals at the MCM, the A/C compressor driver, 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.