The VTM-4 Lock Indicator Does Not Come on For About 4 Seconds When the Ignition Switch Is Turned ON (II)

Symptom Troubleshooting: The VTM-4 LOCK indicator does not come on for about 4 seconds when the ignition switch is turned ON (II)

The VTM-4 LOCK indicator does not come on for about 4 seconds when the ignition switch is turned ON (II)

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

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

3. Connect VTM-4 control unit connector terminal A16 to body ground with a jumper wire.






4. Watch the VTM-4 LOCK indicator.

Does the VTM-4 LOCK indicator come on?
YES - 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

NO - Go to step 5.


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

6. Remove the VTM-4 LOCK switch.

7. Connect the VTM-4 LOCK switch 5P connector terminal No. 5 to body ground with a jumper wire.






8. Check for continuity between VTM-4 control unit connector terminal A16 and body ground.

Is there continuity?
YES - Go to step 9.

NO - Repair open in the wire between VTM-4 control unit (A16) and the VTM-4 LOCK switch.






9. Turn the ignition switch ON (II).

10. Measure the voltage between the VTM-4 LOCK switch 5P connector terminal No. 2 and body ground.

Is there battery voltage?
YES - Replace the VTM-4 LOCK indicator bulb.

NO - Repair open in the wire between the No. 2 terminal of the VTM-4 LOCK switch 5P connector and the driver's under-dash fuse/relay box.