Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Park Lock Solenoid Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Automatic Transmission Shift Lock Control Schematics Connector End View Reference: Automatic Transmission Shift Lock Control Connector End Views or Automatic Transmission Related Connector End Views DEFINITION: Transmission shift lever does not lock in the PARK position with the ignition OFF. | |||
| 1 | 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 |
| 2 | Move the shift lever to the PARK position. Turn OFF the ignition. 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 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Disconnect the park lock solenoid. 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 4 | Go to Step 5 |
| 4 | Inspect for poor connections at park lock 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 7 | Go to Step 6 |
| 5 | Repair the short to battery voltage in the A/T shift lock control switch supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 7 | |
| 6 | Replace the park lock solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement . Did you complete the repair? | Go to Step 7 | |
| 7 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2 |
Park Lock Solenoid Inoperative
Shift Lever Does Not Move with Brake Pedal Depressed
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Automatic Transmission Shift Lock Control Schematics Connector End View Reference: Automatic Transmission Shift Lock Control Connector End Views or Automatic Transmission Related 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 Symptoms - Automatic Transmission Shift Lock Control tests and all the necessary inspection? | Go to Step 2 | Go to Symptoms - Automatic Transmission Shift Lock Control |
| 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 in Wiring Systems | Go to Step 3 |
| 3 | Turn OFF the ignition. Disconnect the automatic transmission shift lock control switch. Turn ON the ignition, with the engine OFF. Press and hold the brake pedal. Attempt to move the transmission shift lever out of the PARK position. Does the transmission shift lever move out of the PARK position? | Go to Step 6 | Go to Step 4 |
| 4 | Turn OFF the ignition. Disconnect 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 transmission shift lever out of the PARK position. Does the transmission shift lever move out of the PARK position? | Go to Step 7 | Go to Step 5 |
| 5 | 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 in Wiring Systems. Did you find and correct the condition? | Go to Step 10 | Go to Step 9 |
| 6 | Inspect for poor connections at the harness connector of the automatic transmission shift lock control switch. 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 10 | Go to Step 8 |
| 7 | Repair the short to battery positive voltage in the A/T shift lock control solenoid supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 10 | |
| 8 | Replace the automatic transmission shift lock control switch. Refer to Stop Lamp Switch Replacement in Lighting Systems. Did you complete the replacement? | Go to Step 10 | |
| 9 | Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement . Did you complete the replacement? | Go to Step 10 | |
| 10 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2 |
Shift Lever Does Not Move with Brake Pedal Depressed
Shift Lever Can Be Moved without Brake Pedal Depressed
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Automatic Transmission Shift Lock Control Schematics Connector End View Reference: Automatic Transmission Shift Lock Control Connector End Views or Automatic Transmission Related Connector End Views DEFINITION: Transmission shift lever does not lock in the PARK position with the ignition ON and the brake pedal not pressed. | |||
| 1 | Did you perform the Symptoms - Automatic Transmission Shift Lock Control tests and all the necessary inspections? | Go to Step 2 | Go to Symptoms - Automatic Transmission Shift Lock Control |
| 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. Does the shift lever move out of the PARK position? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Turn OFF the ignition. Ensure transmission shift lever is in the PARK position. Connect a test lamp between the A/T shift lock switch supply voltage circuit at the BTSI fuse and a good ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 4 | Go to Step 8 |
| 4 | Connect a test lamp between the A/T shift lock switch supply voltage circuit at the automatic transmission shift lock control switch and a good ground. Does the test lamp illuminate? | Go to Step 5 | Go to Step 14 |
| 5 | Connect a test lamp between the A/T shift lock solenoid control circuit at the automatic transmission shift lock control switch and a good ground. Press and release the brake pedal several times. Does the test lamp turn ON and OFF with the brake pedal? | Go to Step 6 | Go to Step 11 |
| 6 | Connect a test lamp between the automatic transmission shift lock control solenoid supply voltage circuit at the automatic transmission shift lock control solenoid and a good ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 15 |
| 7 | Test the automatic transmission shift lock control solenoid ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 12 |
| 8 | Turn OFF the ignition Disconnect the park/neutral position switch connector. Connect a test lamp between the ignition 1 voltage circuit of the park/neutral position switch and a good ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 9 | Go to Step 13 |
| 9 | Turn OFF the ignition Connect a 10 amp fused jumper between the ignition 1 voltage circuit of the park/neutral position switch and the park/neutral position switch park signal circuit at the park/neutral position switch connector. Connect a test lamp between the A/T shift lock switch supply circuit at the BTSI fuse and a good ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate? | Go to Step 10 | Go to Step 16 |
| 10 | Inspect for proper park/neutral position switch adjustment. Refer to Park/Neutral Position Switch Adjustment in Automatic Transmission 4L60-E. Inspect for poor connections at the harness connector of the park/neutral position switch. 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 20 | Go to Step 17 |
| 11 | Inspect for poor connections at the harness connector of the automatic transmission shift lock control switch. 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 20 | Go to Step 18 |
| 12 | Inspect for poor connections at the harness connector 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 20 | Go to Step 19 |
| 13 | Repair the open or short in the ignition 1 voltage circuit of the park/neutral position switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | |
| 14 | Repair the open or short in the A/T shift lock switch supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | |
| 15 | Repair the open in the A/T shift lock control solenoid supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | |
| 16 | Repair the open or short in the park/neutral position switch park signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | |
| 17 | Replace the park/neutral position switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transmission 4L60-E. Did you complete the replacement? | Go to Step 20 | |
| 18 | Replace the automatic transmission shift lock control switch. Refer to Stop Lamp Switch Replacement in Lighting Systems. Did you complete the replacement? | Go to Step 20 | |
| 19 | Replace the automatic transmission shift lock control solenoid. Refer to Automatic Transmission Shift Lock Actuator Replacement . Did you complete the replacement? | Go to Step 20 | |
| 20 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2 |
Shift Lever Can Be Moved without Brake Pedal Depressed
Park Lock Solenoid
The park lock solenoid is a safety device that prevents an inadvertent shift out of PARK when the key is in the OFF position. The key must be in the RUN position to release the park lock solenoid. The system consists of the park lock solenoid. With the ignition in the ON position, voltage is supplied to the park lock solenoid. The park lock solenoid energizes through a permanent ground unlocking the shift lever. With the ignition in the OFF or ACCY position the park lock solenoid de-energizes and locks the shift lever in the park position.