Operation CHARM: Car repair manuals for everyone.

Shift-Lock Function






Shift-lock function

Fault symptoms
Selector lever locked in position P although the ignition is switched on and the brake pedal depressed

Diagnostic help
First, check that the mechanical interlock functions (key-lock and shift-lock) are working.

Diagnostic procedure





1. Check the operation of the brake lights.
- Check whether the brake lights are in working order.

Is the function OK?

YES Continue with step 2.

NO Repair or replace the relevant fuse, wiring or brake lights switch.
Continue with step 3.





2. Check that the microswitch and solenoid are supplied with current and properly grounded.
- Unplug connector H6-4.
- Connect a test lamp to pin 5 of female connector H6-4 and a good grounding point.
- Depress the brake pedal.
The lamp should light up.

- Connect a test lamp to battery positive (B+) and pin 6 of female connector H6-4.
The lamp should light up.

Is the function OK?

YES Change the solenoid and microswitch.
Continue with step 3.

NO Repair or replace the appropriate lead.
Continue with step 3.

3. Final check
- Clear any diagnostic trouble codes.
- Perform a check of functionality.

Is the function OK?

YES The steps taken to rectify the fault were correct.

NO Change the control module.