DTC Troubleshooting

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.
- If DTC U0073 is stored at the same time as DTC U0114, troubleshoot DTC U0073 first, then recheck for DTC U0114.

1. Turn the ignition switch 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 gauge control module, the VTM-4 control unit, and the PCM.

4. Check for the DTCs of the VTM-4 system.

Is VTM-4 DTC 41 indicated?

YES - Go to step 5.

NO - Go to step 8.

5. Turn the ignition switch OFF.
6. Disconnect VTM-4 control unit connector A (22P).




7. Check for continuity between VTM-4 control unit 22P connector terminals A11 and A22*.

Is there continuity?

YES - Substitute a known-good VTM-4 control unit, then go to step 17 and recheck. If DTC U0114 is not indicated, replace the original VTM-4 control unit, then go to step 17.

NO - Repair open in the wire between the VTM-4 control unit (A11 (A22)*) and the PCM (A36 (A1)*), then go to step 17.

*: CANL line

8. Check for poor connections at the VTM-4 control unit 22P connector and 12P connector.

Are the connections OK?

YES - Go to step 9.

NO - Repair the connections, then go to step 17.

9. Turn the ignition switch OFF.
10. If not already done, disconnect VTM-4 control unit connector A (22P).
11. Turn the ignition switch ON (II).




12. Measure voltage between VTM-4 control unit 22P connector terminal A1 and body ground.

Is there battery voltage?

YES - Go to step 13.

NO - Check the No.11 IG1 VTM-4 (7.5 A) fuse in the driver's under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No.11 IG1 VTM-4 (7.5 A) fuse and the VTM-4 control unit, then go to step 16.

13. Turn the ignition switch OFF.
14. Disconnect VTM-4 control unit connector B (12P).




15. Check for continuity between VTM-4 control unit 12P connector terminal B5and body ground.
Is there continuity?

YES - Substitute a known-good VTM-4 control unit, then go to step 17 and recheck. If DTC U0114 is not indicated, replace the original VTM-4 control unit, then go to step 17.

NO - Repair open in the wire between the VTM-4 control unit and G602, then go to step 17.

16. Turn the ignition switch OFF.
17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Reset the PCM with the HDS.
20. Do the PCM idle learn procedure.
21. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U0114 indicated?

YES - Check for poor connections or loose terminals at the gauge control module, 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 DTCs troubleshooting.