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The VTM-4 Lock Indicator Does Not Come on When the VTM-4 Lock Switch Is Pressed
The VTM-4 LOCK indicator does not come on when the VTM-4 LOCK switch is pressedNOTE: The VTM-4 LOCK indicator will only come on when the engine is running and the transmission is in R, 1, or 2 before the VTM-4 LOCK switch is pressed.
1. Check the No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 2.
NO - Replace the fuse, and recheck.
2. Turn the ignition switch ON (II).
3. Watch the VTM-4 LOCK indicator.
Does the VTM-4 LOCK indicator come on, and does it go off about 4 seconds later?
YES - Go to step 4.
NO - Go to step 11.
4. Start the engine, and move the shift lever to R, 1, and 2, then watch the VTM-4 LOCK indicator.
Does the VTM-4 LOCK indicator come on when the VTM-4 LOCK switch is pressed?
YES - The system is OK at this time.*
NO - Go to step 5.
5. Check for an A/T system DTC.
Is there a DTC?
YES - Troubleshoot the A/T system indicated DTC.
NO - Go to step 6.
6. Turn the ignition switch OFF.
7. Disconnect the VTM-4 control unit connector A (22P).
8. Turn the ignition switch ON (II).
9. Connect a voltmeter between the A8 terminal of the VTM-4 control unit and body ground.
Is there battery voltage when the VTM-4 LOCK switch is pressed?
YES - Check for poor connections or loose terminals at the VTM-4 control unit connectors. If the connections are OK, replace the VTM-4 control unit.
NO - Go to step 10.
10. Test the VTM-4 LOCK switch.
Is the VTM-4 LOCK switch OK?
YES - Repair open in the wire between the VTM-4 LOCK switch and the VTM-4 control unit.
NO - Replace the VTM-4 LOCK switch.
11. Connect the No. 16 terminal of the VTM-4 control unit connector A (22P) to body ground with a jumper wire.
12. 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, replace the VTM-4 control unit.
NO - Go to step 13.
13. Turn the ignition switch OFF.
14. Remove the VTM-4 LOCK switch.
15. Connect the No. 5 terminal of the VTM-4 LOCK switch 6P connector to body ground with a jumper wire.
16. Check the continuity between the No. 16 terminal of the VTM-4 control unit connector A (22P) and body ground.
Is there continuity?
YES - Go to step 17.
NO - Repair open in the wire between the VTM-4 control unit (A16) and the VTM-4 LOCK switch.
17. Turn the ignition switch ON (II).
18. Measure voltage between the No. 2 terminal of the VTM-4 LOCK switch 6P connector 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 6P connector and the driver's under-dash fuse/relay box.