DTC Troubleshooting

DTC Troubleshooting: U0114

DTC U0114: F-CAN Malfunction (PCM-VTM-4 Control Unit)

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 Temporary DTCs or DTCs with the HDS.

Is DTC U0114 indicated?
YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the VTM-4 control unit and the PCM.


4. Check for VTM-4 system DTCs in the DTCs MENU with the HDS.

Is TCS DTC 41 indicated?
YES - Go to the VTM-4 system's DTC troubleshooting. Initial Inspection and Diagnostic Overview

NO - Go to step 5.


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

6. Jump the SCS line with the HDS.

7. Disconnect VTM-4 control unit connector A (22P).

8. Disconnect PCM connector A (49P).

9. Connect VTM-4 control unit connector A (22P) terminal No. 11 to body ground with a jumper wire.






10. Check for continuity between PCM connector terminal A48 and body ground.

Is there continuity?
YES - Go to step 11.

NO - Repair open in the wire between the PCM (A48) and the VTM-4 control unit, then go to step 13.






11. Connect VTM-4 control unit connector A (22P) terminal No. 22 to body ground with a jumper wire.






12. Check for continuity between PCM connector terminal A49 and body ground.

Is there continuity?
YES - Substitute a known-good VTM-4 control unit, Service and Repair then go to step 13 and recheck. If DTC U0114 is not indicated after substitution, replace the original VTM-4 control unit, Service and Repair then go to step 13.

NO - Repair open in the wire between the PCM (A49) and the VTM-4 control unit, then go to step 14.






13. Reconnect all connectors.

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

15. Reset the PCM with the HDS.

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

17. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U0114 indicated?
YES - Check for poor connections or loose terminals at the VTM-4 control unit 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 DTC's troubleshooting.