Indicator Does Not Come on When the Vtm-4 Lock Switch Is Pushed

The VTM-4 LOCK indicator does not come on when the VTM-4 lock switch is pushed

NOTE: 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 switch is pressed.

1. Check the No. 9 (10A) 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 positions, then watch the VTM-4 LOCK indicator.
Does the VTM-4 LOCK indicator come on when the VTM-4 lock switch is pushed?
YES-The system is OK at this time.
NO-Go to step 4.
4. Check for A/T system DTC.
Is there 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 the A (22P) and B (26P) connectors from the VTM-4 control unit.
7. Turn the ignition switch ON (II).





8. Connect a voltmeter between the B11 terminal of the VTM-4 control unit and body ground.
Is there battery voltage when the VTM-4 lock switch is pushed?
YES-Check for loose terminal fit in the VTM-4 control unit connectors. If it is normal, replace the VTM-4 control unit.
NO-Go to step 9.
9. 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.





10. Connect the B9 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 connectors. 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 switch.





13. Connect the No. 5 terminal of the VTM-4 lock switch 5P connector to body ground with a jumper wire. Check the continuity between the B9 terminal and body ground.
Is there continuity?
YES-Go to step 14.
NO-Repair open in the wire between the B9 terminal and the VTM-4 lock switch.
14. Turn the ignition switch ON (II).





15. Measure the voltage between the No. 2 terminal of the VTM-4 lock switch 5P 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 5P connector and the driver's under-dash fuse/relay boxes