Schematic Reference: Shift Lock Control Schematics

Connector End View Reference: Computer/Integrating Systems Connector End Views in Computer/Integrating Systems

DEFINITION: Transmission shift lever will not moved out of the PARK position with the Ignition on and the brake pedal pressed.

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

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 in Wiring Systems

Go to Step 3

1. Turn OFF the ignition.
2. Install a scan tool.
3. Turn ON the ignition, with the engine OFF.
4. Press and hold the brake pedal.
5. With the scan tool, turn the Brake to Shift Relay output control ON.
6. Attempt to move the shift lever out of the PARK position.

Does the shift lever move out of the PARK position?

Go to Step 4

Go to Step 6

1. With the scan tool, observe the Brake Switch parameter in the engine control module (ECM) / powertrain control module (PCM) data list.
2. Press and release the brake pedal several times while observing the scan tool.

Does the brake input display Applied and Released with the brake pedal operation?

Go to Step 5

Go to Diagnostic Starting Point - Lighting Systems in Lighting Systems

With the scan tool observe the Transmission Range or TR Sw. parameter in the ECM/PCM data list.

Does the scan tool indicate PARK position?

Inspect the BCM

Go to Diagnostic Starting Point - Engine Controls in Engine Controls - 2.2L (L61) or Diagnostic Starting Point - Engine Controls in Engine Controls - 3.5L (L66)

1. Turn OFF the ignition.
2. Disconnect the harness connector of the automatic transmission shift lock control solenoid.
3. Turn ON the ignition, with the engine OFF.
4. Press and hold the brake pedal.
5. Attempt to move the shift lever out of the PARK position.

Does the shift lever move out of the PARK position?

Go to Step 7

Go to Step 8

Test the controlled ground circuit of the automatic transmission shift lock control solenoid for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 9

Inspect for poor connections as the harness connector of the automatic transmission shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 10

Inspect for poor connections as the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 11

Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Control Actuator Replacement .

Did you complete the replacement?

Go to Step 12

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Important: Perform the setup procedure for the BCM.

Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

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