PGM-FI System

DTC Troubleshooting: U1207

DTC U1207:

IMA-CAN Malfunction (PCM-A/C Compressor Driver)

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Check for Pending or Confirmed DTCs with the HDS.

Are U0037 and DTC U1207 indicated at the same time?

YES -

Go to Troubleshooting for DTC P0037 U0037.�

NO -

Go to step 4.

4. Check for Pending or Confirmed DTCs with the HDS again.

Is DTC U1207 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 MCM, the BCM module, the A/C compressor driver, and the PCM.�

5. Check the No. 9 (7.5 A) fuse in under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 6.

NO -

Repair short in the wire the A/C compressor driver and the No. 9 (7.5 A) fuse. Also replace the No. 9 (7.5 A) fuse, then go to step 21.

6. Turn the ignition switch to LOCK (0).

7. Remove the rear seat Rear Seat Removal/Installation.

8. Turn the battery module switch OFF.

9. Remove the IPU lid IPU Lid Removal/Installation.

10. Disconnect BCM module connector A (40P) Service and Repair.

11. Disconnect the A/C compressor driver 4P connector Service and Repair.

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 19.

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 (A40) and the A/C compressor driver, then go to step 19.

14. Turn the ignition switch to ON (II).

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





Is there battery voltage?

YES -

Go to step 16.

NO -

Repair open in the wire the A/C compressor driver and the No. 9 (7.5 A) fuse, then go to step 18.

16. Turn the ignition switch to LOCK (0).

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





Is there continuity?

YES -

Substitute a known-good A/C compressor driver Service and Repair, then go to step 18 and recheck. If DTC U1207 is not indicated after substitution, replace the original A/C compressor driver Service and Repair, then go to step 18.

NO -

Repair open in the wire between the A/C compressor driver and G902, then go to step 19.

18. Turn the ignition switch to LOCK (0).

19. Reconnect all connectors.

20. Reinstall the IPU lid IPU Lid Removal/Installation, then turn the battery module switch ON High Voltage Safety.

21. Turn the ignition switch to ON (II).

22. Reset the PCM with the HDS.

23. Do the PCM idle learn procedure PCM Idle Learn Procedure.

24. Check for Pending or Confirmed DTCs with the HDS.

Is DTC U1207 indicated?

YES -

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

NO -

Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�