Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .
Shift Lever Does Not Move with Brake Pedal Depressed
| Step | Action | Yes | No |
|---|
| Schematic Reference: Shift Lock Control Schematics Connector End View Reference: Shift Lock Control Connector End Views DEFINITION: Transmission shift lever will not move out of the PARK position with the Ignition ON and the brake pedal pressed. |
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Turn ON the ignition, with the engine OFF. Press and hold the brake pedal. 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 |
| 3 | Turn OFF the ignition. Install a scan tool. Turn ON the ignition, with the engine OFF. Press and hold the brake pedal. With the scan tool, turn the Brake to Shift Relay output control ON. 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 |
| 4 | With the scan tool, observe the Brake Switch parameter in the engine control module (ECM)/powertrain control module (PCM) data list. 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 |
| 5 | 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 for the 2.2L (L61) engine or Diagnostic Starting Point - Engine Controls for the 3.5L (L66) engine |
| 6 | Turn OFF the ignition. Disconnect the harness connector of the automatic transmission shift lock control solenoid. Turn ON the ignition, with the engine OFF. Press and hold the brake pedal. 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 |
| 7 | 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 . Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
| 8 | 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 . Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
| 9 | Inspect for poor connections as the harness connector of the BCM. 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 |
| 10 | Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement . Did you complete the replacement? | Go to Step 12 | |
| 11 | IMPORTANT: Perform the setup procedure for the BCM. Replace the BCM. Refer to Control Module References for replacement, setup, and programming.Did you complete the replacement? | Go to Step 12 | |
| 12 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 3 |
| IMPORTANT |
|---|
| Perform the setup procedure for the BCM. |
Shift Lever Does Not Move with Brake Pedal Depressed
Shift Lever Can Be Moved without Brake Pedal Depressed
| Step | Action | Yes | No |
|---|
| Schematic Reference: Shift Lock Control Schematics Connector End View Reference: Shift Lock Control Connector End Views DEFINITION: Transmission shift lever does not lock in the PARK position with the ignition ON and the brake pedal not depressed. |
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Apply the parking brake and block the wheels. Turn ON the ignition, with the engine OFF. Attempt to move the shift lever out of the PARK position without pressing the brake pedal. Does the shift lever move out of the PARK position? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections |
| 3 | Turn OFF the ignition. Install a scan tool. Turn ON the ignition, with the engine OFF. Ensure the brake pedal is not depressed. With a scan tool observe the Shifter Unlock Fdbk parameter in the body control module (BCM) data list. Does the scan tool display a LOW status for the brake to shift parameter? | Go to Step 5 | Go to Step 4 |
| 4 | With a scan tool observe the Brake Switch parameter in the engine control module (ECM) / powertrain control module (PCM) data list. Does the scan tool display an Released status for the brake switch parameter? | Go to Step 9 | Refer to Diagnostic Starting Point - Lighting Systems |
| 5 | Turn OFF the ignition. Connect a test lamp between the automatic transmission shift lock control solenoid voltage supply circuit at the connector of the automatic transmission shift lock control solenoid and a good ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 6 | Go to Step 10 |
| 6 | Turn OFF the ignition. Connect a test lamp between the automatic transmission shift lock control solenoid voltage supply circuit and the control circuit of the automatic transmission shift lock control solenoid at the connector of the automatic transmission shift lock control solenoid. Turn ON the ignition, with the engine OFF. With a scan tool, command the Brake to Shift Relay output control ON and OFF. Does the test lamp turn ON and OFF with each command? | Go to Step 8 | Go to Step 7 |
| 7 | Test the controlled ground circuit of the automatic transmission shift lock control solenoid for an open or short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
| 8 | Inspect for poor connections at the harness connector of the automatic transmission shift lock control solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 11 |
| 9 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
| 10 | Repair the open or short to ground in the automatic transmission shift lock control solenoid voltage supply circuit. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 13 | |
| 11 | Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement . Did you complete the repair? | Go to Step 13 | |
| 12 | IMPORTANT: Perform the setup procedure for the BCM. Replace the BCM. Refer to Control Module References for replacement, setup, and programming.Did you complete the repair? | Go to Step 13 | |
| 13 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
| IMPORTANT |
|---|
| Perform the setup procedure for the BCM. |
Shift Lever Can Be Moved without Brake Pedal Depressed
