Important: Inspect for mechanical binding and ensure that the transmission linkage is adjusted properly prior to performing this diagnostic procedure.

Did you perform the BTSI System Check?

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Go to Step 2

Go to Automatic Transmission Shift Lock Control System Check

1. Disconnect the TCC/stoplamp switch.
2. Use a J 39200 DMM in order to test the TCC/stoplamp switch for proper operation.

Does the TCC/stoplamp switch operate properly?

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Go to Step 4

Go to Step 3

Replace the TCC/stoplamp switch. Refer to Stop Lamp Switch Replacement .

Is the repair complete?

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Go to Automatic Transmission Shift Lock Control System Check

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1. Turn the ignition switch to the ON position. Do not start the engine.
2. Connect a test lamp between the TCC/stoplamp switch connector terminal F and ground.

Does the test lamp light?

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Go to Step 6

Go to Step 5

Locate and repair an open in the park solenoid or CKT 584 (DK GRN/BLK).

Is the repair complete?

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Go to Automatic Transmission Shift Lock Control System Check

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Locate and repair a short to power in the park solenoid or CKT 1134 (DK GRN/WHT).

Is the repair complete?

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Go to Automatic Transmission Shift Lock Control System Check

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