DTC Troubleshooting

DTC P0A1F (112): F-CAN Malfunction (BCM Module-MCM)

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 (98) indicated?

YES - Do the troubleshooting for DTC U0037 (98).

NO - Go to step 3.

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

Is DTC P0A1F (112) 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 and the MCM.

5. Turn the ignition switch OFF.
6. Turn the battery module switch OFF.
7. Remove the IPU lid.
8. Remove the BCM module
9. Disconnect the MCM 20P connector.
10. Check for continuity between BCM module connector terminal A1 and MCM 20P connector terminal No. 20, between BCM module connector terminal A21 and MCM 20P connector terminal No. 10, between BCM module connector terminal A20 and MCM 20P connector terminal No. 11, and between BCM module connector terminal A40 and MCM 20P connector terminal No. 1.






Is there continuity?

YES - Go to step 17.

NO - Repair open in the wire between the BCM module (A1, A21, A20, A40) and the MCM (No. 10, No. 20, No. 11, No. 1), then go to step 11.

11. Reconnect all connectors.
12. Reinstall the IPU lid, then turn the battery module switch ON.
13. Turn the ignition switch ON (II).
14. Clear the DTC with the HDS.
15. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0A1F (112) indicated?

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

NO - Go to step 16.

16. Monitor the OBD STATUS for DTC POAIF (112) 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 15, go to the indicated DTC's troubleshooting.

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

17. Reconnect all connectors.
18. Reinstall the IPU lid, then turn the battery module switch ON.
19. Update the BCM module if it does not have the latest software, or substitute a known-good BCM module.
20. Check for Temporary DTCs or DTCs with the HDS.

Is DTC PO607 (82) indicated?

YES - Check for poor connections or loose terminals at the BCM module and the MCM. If the BCM module was updated, substitute a known-good BCM module, then recheck. If the BCM module was substituted, go to step 1.

NO - Go to step 21.

21. Monitor the OBD STATUS for DTC P0A1F (112) in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - If the BCM module was updated, troubleshooting is complete. If the BCM module was substituted, replace the original BCM module. If any other Temporary DTCs or DTCs were indicated in step 20, go to the indicated DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the BCM module and the MCM. If the BCM module was updated, substitute a known-good BCM module, then recheck. If the BCM module was substituted, go to step 1. If the screen indicates NOT COMPLETED, keep the ignition switch ON (II) until a result comes on.