Fuel and Emissions

DTC U1206: IMA-CAN Malfunction (PCM-BCM Module)

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.

Are DTC U0037 and U1206 indicated at the same time?

YES - Go to troubleshooting for DTC U0037.

NO - Go to step 4.

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

Is DTC U1206 indicated?

YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MCM, the BCM module, and the PCM.

6. Turn the ignition switch OFF.
7. Remove the rear seat.
8. Turn the battery module switch OFF.
9. Remove the IPU lid.
10. Remove the BCM module.
11. Disconnect the MCM 20P connector.
12. Check for continuity between BCM module connector terminal A20 and MCM 20P connector terminal No. 11.






Is there continuity?

YES - Go to step 13.

NO - Repair open in the wire between the BCM module (A20) and the MCM (No. 11), then go to step 14.

13. Check for continuity between BCM module connector terminal A40 and MCM 20P connector terminal No.1.






Is there continuity?

YES - Update the BCM module if it does not have the latest software, or substitute a known-good BCM module, then go to step 14 and recheck. If DTC U1206 is not indicated with a known-good BCM module, replace the original BCM module, then go to step 14.

NO - Repair open in the wire between the BCM module (A40) and the MCM (No. 1), then go to step 14.

14. Turn the ignition switch OFF.
15. Reconnect all connectors.
16. Reinstall the IPU lid, then turn the battery module switch ON.
17. Turn the ignition switch ON (II).
18. Reset the PCM with the HDS.
19. Do the PCM idle learn procedure.
20. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U1206 indicated?

YES - Check for poor connections or loose terminals at the MCM, the BCM module, and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.