The VTM-4 Lock Indicator Does Not Come On When the VTM-4 Lock Button Is Pressed

The VTM-4 LOCK indicator does not come on when the VTM-4 LOCK button is pressed

NOTE: The VTM-4 LOCK indicator will only come on when the engine is running and the transmission is in R, 1, or 2 position before the button is pressed.

1. Check the No. 4 (7.5 A) fuse in the driver's underdash 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), and watch the VTM-4 LOCK indicator.
Does the VTM-4 LOCK indicator come on with the ignition switch ON (II), and does it go off 4 seconds later?
YES-Go to step 3.
NO-Go to step 10.
3. Start the engine, and move the shift lever to the R, 1, and 2 position, then watch the VTM-4 LOCK indicator.
Does the VTM-4 LOCK indicator come on when the VTM-4 LOCK button is pressed?
YES-The system is OK at this time.
NO-Go to step 4.
4. Check for an A/T system DTC.
Is there a DTC?
YES-Troubleshoot the A/T system for the cause of the DTC.
NO-Go to step 5.
5. Turn the ignition switch OFF.
6. Disconnect connector A (22P) from the VTM-4 control unit.
7. Turn the ignition switch ON (II).





8. 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 button is pressed?
YES-Check for loose terminal fit in the VTM-4 control unit connector. If it is normal, replace the VTM-4 control unit.
NO-Go to step 9.
9. Test the VTM-4 LOCK button.
Is the VTM-4 LOCK button OK?
YES-Repair open in the wire between the VTM-4 LOCK button and the VTM-4 control unit.
NO-Replace the VTM-4 LOCK button.





10. Connect the A16 terminal of the VTM-4 control unit to body ground with a jumper wire, and watch the VTM-4 LOCK indicator.
Does the VTM-4 LOCK indicator come on?
YES-Check for loose terminal fit in the VTM-4 control unit connector. If it is normal, replace the VTM-4 control unit.
NO-Go to step 11.
11. Turn the ignition switch OFF.
12. Remove the VTM-4 LOCK button.





13. Connect the No. 1 terminal of the VTM-4 LOCK button 6P connector to body ground with a jumper wire. Check the continuity between the A16 terminal of the VTM-4 control unit connector and body ground.
Is there continuity?
YES-Go to step 14.
NO-Repair open in the wire between the A16 terminal and the VTM-4 LOCK button.
14. Turn the ignition switch ON (II).





15. Measure the voltage between the No. 2 terminal of the VTM-4 LOCK button 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 button 6P connector and the driver's under-dash fuse/relay box.