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. Check for Pending or Confirmed DTCs with the HDS.

Are DTC U0029 and U0114 indicated at the same time?

YES -

Go to troubleshooting for DTC U0029 U0029.�

NO -

Go to step 3.

3. Clear the DTC with the HDS.

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

Is DTC U0114 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 VTM-4 control unit and the PCM.�

5. Check for communication to the VTM-4 system with the HDS.

Does the HDS communicate with the VTM-4 control unit?

YES -

Go to step 6.

NO -

Go to symptom troubleshooting for VTM-4 LOCK indicator comes on when the ignition switch is turned ON (II) and does not go off The VTM-4 Lock Indicator Comes On When The Ignition Switch Is Turned On (II) And Does Not Go Off.�

6. 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 41-1.

NO -

Go to step 7.

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

8. Jump the SCS line with the HDS.

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

10. Disconnect PCM connector A (49P).

11. Check for continuity between PCM connector terminal A48 and VTM-4 control unit connector A (22P) terminal No. 11.





Is there continuity?

YES -

Go to step 12.

NO -

Repair an open in the wire between the PCM(A48) and the VTM-4 control unit, then go to step 13.

12. Check for continuity between PCM connector terminal A49 and VTM-4 control unit connector A (22P) terminal No. 22.





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 an open in the wire between the PCM(A49) and the VTM-4 control unit, then go to step 13.

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 Pending or Confirmed 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 Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�