Schematic Reference: Shift Lock Control Schematics

Did you review the Automatic Transmission Shift Lock Control Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Automatic Transmission Shift Lock Control

1. Turn the ignition switch to the ON position.
2. Attempt to move the selector lever out of the PARK position. The selector lever should not move from the PARK position.
3. Press and hold the brake pedal.
4. Attempt to move the selector lever out of the PARK position. The selector lever should move out of the PARK position.

Does the shift lock control operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Connect a scan tool and monitor the brake switch parameter in the Engine Data List.

Does the brake switch indicate Applied when the brake pedal is depressed?

Go to Step 4

Go to Step 6

Test the brake switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 7

Go to Step 5

Adjust or replace the stoplamp switch. Refer to Stop Lamp Switch Adjustment or Stop Lamp Switch Replacement in Hydraulic Brakes.

Is the repair complete?

Go to Step 7

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Replace the shift lock control module. Refer to Shift Lock Control Module Replacement .

Is the repair complete?

Go to Step 7

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Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 3