GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Rendezvous - AWD 🢒 Transmission/Transaxle 🢒 Shift Lock Control 🢒 Shift Lever Can Be Moved without Brake Pedal Depressed

Shift Lever Can Be Moved without Brake Pedal Depressed Buick

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 pressed.

1

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

Go to Step 2

Go to Diagnostic System Check - Automatic Transmission Shift Lock Control

2
  1. Apply the parking brake and block the wheels.
  2. Turn ON the ignition, with the engine OFF.
  3. 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
  1. Turn OFF the ignition.
  2. Connect a test lamp between the Ignition 1 circuit at the automatic transmission shift lock control switch and a good ground.
  3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 4

Go to Step 11

4
  1. Turn OFF the ignition.
  2. Connect a test lamp between the automatic transmission shift lock control switch signal circuit at the automatic transmission shift lock control switch 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 9

5
  1. Turn OFF the ignition.
  2. Connect a test lamp between the automatic transmission shift lock control switch signal circuit at the automatic transmission shift lock control solenoid connector and a good ground.
  3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 6

Go to Step 12

6
  1. Turn OFF the ignition.
  2. Disconnect the electrical connector of the automatic transmission shift lock control solenoid.
  3. Connect a test lamp between the automatic transmission shift lock control solenoid signal circuit and the automatic transmission shift lock control solenoid controlled ground circuit at the connector of the automatic transmission shift lock control solenoid.
  4. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 10

Go to Step 7

7
  1. Turn OFF the ignition.
  2. Connect a test lamp between battery positive voltage (B+) and the automatic transmission shift lock control solenoid controlled ground circuit at the connector of the body control module (BCM).
  3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 13

Go to Step 8

8

Inspect for poor connections at the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 16

9
  1. Inspect for proper adjustment of automatic transmission shift lock control switch. Refer to Stop Lamp Switch Adjustment in Lighting Systems.
  2. Inspect for poor connections at the automatic transmission shift lock control switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 14

10

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

Did you find and correct the condition?

Go to Step 17

Go to Step 15

11

Repair the open in the ignition 1 power feed circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 17

--

12

Repair the open in the automatic transmission shift lock control switch signal circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 17

--

13

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

Did you complete the repair?

Go to Step 17

--

14

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 17

--

15

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

Did you complete the replacement?

Go to Step 17

--

16

Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 17

--

17

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 Pontiac

Step

Action

Yes

No

Schematic Reference: Shift Lock Control Schematics

Connector End View Reference: Shift Lock Control Connector End Views

DEFINITION: Transmission shift lock does not lock in the PARK position with the ignition ON and the brake pedal not press or with the ignition OFF.

1

Did you perform the Diagnostic System Check - Automatic Transmission Shift Lock Control tests and necessary inspections?

Go to Step 2

Go to Diagnostic System Check - Automatic Transmission Shift Lock Control

2
  1. Turn ON the ignition, with the engine OFF.
  2. Apply the parking brakes and block the wheels.
  3. 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 in Wiring Systems

3
  1. Turn OFF the ignition.
  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 Step 4

Go to Step 5

4

Test for a short to battery positive voltage in the ignition 3 circuit of the park lock solenoid. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 8

5
  1. Connect a test lamp between the automatic transmission shift lock control switch ignition 3 voltage circuit at the automatic transmission shift lock control switch and a good ground.
  2. Turn ON the ignition, with the engine OFF

Does the test lamp illuminate?

Go to Step 6

Go to Step 11

6
  1. Turn OFF the ignition.
  2. Connect a test lamp between the A/T shift lock control solenoid supply voltage circuit at the automatic transmission shift lock control switch and a good ground.
  3. Turn ON the ignition, with the engine OFF.
  4. Press and release the brake pedal several times.

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

Go to Step 7

Go to Step 9

7
  1. Turn OFF the ignition.
  2. Connect a test lamp between the A/T shift lock control solenoid supply voltage circuit at the automatic transmission shift lock control solenoid and a good ground.
  3. Turn ON the ignition, with the engine OFF.
  4. Press and release the brake pedal several times.

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

Go to Step 8

Go to Step 10

8

Inspect for poor connections at the harness connector of the automatic transmission shift lock control and park lock solenoids. 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 14

Go to Step 13

9
  1. Inspect the automatic transmission shift lock control switch for proper adjustment. Refer to Stop Lamp Switch Adjustment in Lighting Systems.
  2. 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 14

Go to Step 12

10

Repair the open in the automatic transmission 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 14

--

11

Repair the open in the automatic transmission shift lock control switch ignition 3 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 14

--

12

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 14

--

13

Replace the automatic shift lock control/park lock solenoids. Refer to Transmission Control Replacement in Automatic Transaxle 4T65-E.

Did you complete the replacement?

Go to Step 14

--

14

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2