The VTM-4 Indicator Does Not Go Off, But No DTCs Are Stored In Any System: VTM-4, VSA, Or PGM-FI

Rear Differential Symptom Troubleshooting - The VTM-4 indicator does not go off, but no DTCs are stored in any system: VTM-4, VSA, or PGM-FI

The VTM-4 indicator does not go off, but no DTCs are stored in any system: VTM-4, VSA, or PGM-FI

NOTE: Before you troubleshoot, review the general troubleshooting information Initial Inspection and Diagnostic Overview.

1. Check the No. 1 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 2.

NO -

Replace the fuse, and recheck.�

2. Do the VTM-4 control unit Initialization.

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

4. Check the VTM-4 indicator.

Does the VTM-4 indicator come on and stay on?

YES -

Go to step 5.

NO -

The system is OK at this time.�

5. Measure the voltage between VTM-4 control unit connector terminals A1 and A10, and between VTM-4 control unit connector terminals A1 and B12 respectively.





Is there battery voltage?

YES -

Go to step 6.

NO -

Repair an open in the wire between VTM-4 control unit connector terminal A1 and the under-dash fuse/relay box, or VTM-4 control unit connector terminal A10 or B12 and body ground.�

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

7. Disconnect VTM-4 control unit connector A (22P) and the gauge control module 32P connector.

8. Check for continuity between VTM-4 control unit connector terminals A14 and B11 to body ground respectively.





Is there continuity?

YES -

Repair a short to ground in the wire between VTM-4 control unit connector terminal A14 or B11 and the gauge control module.�

NO -

Go to step 9.

9. Reconnect the gauge control module 32P connector.

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

11. Check the VTM-4 indicator.

Does the VTM-4 indicator come on?

YES -

Go to the gauge control module self-diagnostic function Initial Inspection and Diagnostic Overview.�

NO -

Check for poor connections or loose terminals at the VTM-4 control unit connectors. If the connections are OK, substitute a known-good VTM-4 control unit Service and Repair, and recheck. If the symptom/indication goes away with the known-good VTM-4 control unit, replace the original VTM-4 control unit Service and Repair.�