Schematic Reference: Shift Lock Control Schematics

Connector End View Reference: Shift Lock Control Connector End Views or Lighting Systems Connector End Views

Did you perform the Symptoms - Automatic Transmission Shift Lock Control tests and perform all the necessary inspections?

Go to Step 2

Go to Symptoms - Automatic Transmission Shift Lock Control

1. Turn ON the ignition, with the engine OFF.
2. Press and hold the brake pedal.
3. Attempt to move the shift lever out of the PARK position.

Does the shift lever move out of the PARK position?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Do the stop lamps operate properly?

Go to Step 4

Go to Diagnostic Starting Point - Lighting Systems

1. Turn OFF the ignition.
2. Connect a test lamp between the automatic transmission shift lock control module voltage supply circuit at the automatic transmission shift lock control module connector and a good ground.
3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 5

Go to Step 8

1. Turn OFF the ignition.
2. Connect a test lamp between the automatic transmission shift lock control module voltage supply circuit and the automatic transmission shift lock control module ground circuit at the automatic transmission shift lock control module connector.
3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 6

Go to Step 9

1. Connect a test lamp between the automatic transmission shift lock control input signal circuit at the harness connector of the automatic transmission shift lock control module and a good ground.
2. Press and release the brake pedal several times while observing the test lamp.

Does the test lamp turn ON and OFF with the brake pedal?

Go to Step 7

Go to Step 10

Inspect for poor connections at the harness connector of the automatic transmission shift lock control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 12

Go to Step 11

Repair the open or short to ground in the automatic transmission shift lock control module voltage supply circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 12

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Repair the open in the automatic transmission shift lock control module ground circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 12

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Repair the open or short to ground in the automatic transmission shift lock control input signal circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 12

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

Did you complete the replacement?

Go to Step 12

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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