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 point 3, final check.

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 point 3, final check.

no

Repair or replace the appropriate lead. Continue with point 3, final check.

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.