Integrated Motor Assist

DTC U1207 (80): IMA-CAN Malfunction (A/C Compressor Driver-BCM Module)

NOTE: Before you troubleshoot, record all freeze data, and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U0037 (99) indicated?

YES - Do the troubleshooting for DTC U0037 (99).

NO - Go to step 3.

3. Clear the DTC with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U1207 (80) 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 BCM module, the A/C compressor driver, and the PCM.

5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF.
7. Remove the IPU lid.
8. Check the A/C compressor driver 4P connector.

Is the connector OK?

YES - Go to step 9.

NO - Repair the connector, then go to step 18.

9. Check the No.22 IGI HAC (A/C) (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES - Go to step 10.

NO - Repair short to ground in the wire between the A/C compressor driver and the No. 22 IGI HAC (A/C) (7.5 A) fuse. Also replace the No. 22 IGI HAC (A/C) fuse, then go to step 18.

10. Disconnect the A/C compressor driver 4P connector.
11. Disconnect BCM module connector A (40P).
12. Check for continuity between BCM module connector terminal A20 and A/C compressor driver 4P connector terminal No. 2.






Is there continuity?

YES - Go to step 13.

NO - Repair open in the wire between the BCM module (A20) and the A/C compressor driver, then go to step 18.

13. Check for continuity between BCM module connector terminal A40 and A/C compressor driver 4P connector terminal No. 3.






Is there continuity?

YES - Go to step 14.

NO - Repair open in the wire between the BCM module (A401 and the A/C compressor driver, then go to step 18.

14. Turn the ignition switch ON (II).
15. Measure voltage between A/C compressor driver 4P connector terminal No. 4 and body ground.






Is there 72 V battery voltage?

YES - Go to step 16.

NO - Repair open in the wire between the A/C compressor driver and the No. 22 IGI HAC (A/C) (7.5 A) fuse, then go to step 18.

16. Turn the ignition switch OFF.
17. Check for continuity between A/C compressor driver 4P connector terminal No. 1 and body ground.






Is there continuity?

YES - Replace the A/C compressor driver, then go to step 18.

NO - Repair open in the wire between the A/C compressor driver and G902, then go to step 18.

18. Turn the ignition switch OFF.
19. Reconnect all connectors.
20. Reinstall the IPU lid, then turn the battery module switch ON.
21. Turn the ignition switch ON (II).
22. Clear the DTC with the HDS.
23. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U1207 (80) indicated?

YES - Check for poor connections or loose terminals at the BCM module, the A/C compressor driver, and the PCM, then go to step 1.

NO - Go to step 24.

24. Monitor the OBD STATUS for DTC U1207 (80) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 23, go to the indicated DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the BCM module, the A/C compressor driver, and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.