DeVille, Eldorado, Seville 1999-2005

Shift Lock Control

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Description & Operation



The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components.



The park relay.
 
The automatic transmission shift lock control solenoid.
 
The automatic transmission shift lock control switch.
 
The rear integration module (RIM).
 
The powertrain control module (PCM).
 

With the ignition ON, positive voltage is supplied from the ignition switch to the coil side feed circuit of the park relay. The RIM receives a gear position input signal from the PCM through a class 2 serial data message. When the RIM receives a PARK position message from the PCM, the RIM applies a ground to the control circuit of the park relay. This energizes the relay, closing the switch contacts, battery voltage flows through the relay to the automatic transmission shift lock control switch. With the brake pedal released voltage flows through the normally closed contacts of the automatic transmission shift lock control switch to the automatic transmission shift lock control solenoid. The automatic transmission shift lock control solenoid is permanently grounded. This energizes the automatic transmission shift lock control solenoid and mechanically locks the shift lever in the PARK position. When the driver presses the brake pedal the contacts of the automatic transmission shift lock control switch open, de-energizing the automatic transmission shift lock control solenoid. This allows the shift lever to be moved from the PARK position.

When the shift lever is moved out of the PARK position, the PCM sends a class 2 serial data message to the RIM. The RIM opens the ground path of the park relay control circuit, de-energizing the park relay and disabling the automatic transmission shift lock control solenoid. Once the vehicle is out of PARK, the automatic transmission shift lock control solenoid remains de-energized until the RIM receives a PARK signal from the PCM.

Removal & Installation



  1. Remove the console trim plate.
  2.  
  3. If equipped, remove the anti-theft plate and tamper proof fastener from the shifter using removal tool J 43146.

    Click image to see an enlarged view

    Fig. Removing shift lock actuator wiring from shift lock actuator solenoid connector

  4.  
  5. Disconnect the automatic transmission shift lock actuator wire harness connector, from the automatic transmission shift lock actuator solenoid.
  6.  
  7. Disengage the locking tab on the park lock cable and lift the cable out of the slot in the shifter.
  8.  
  9. Unhook the park lock cable from the park lock cam on the shifter.
  10.  
  11. Turn the ignition switch to the run position.
  12.  
  13. Depress the locking tab (1) on the cable and pull the cable out of the back of the ignition switch. The locking tab is located on the bottom of the ignition switch facing in the 6 o'clock position.
  14.  
  15. Remove the park lock cable from the vehicle.

    Click image to see an enlarged view

    Fig. Identifying locking tab (1) on shift lock actuator cable



    Click image to see an enlarged view

    Fig. Removing the park lock cable

  16.  

To install:

Click image to see an enlarged view

Fig. Aligning cable locking tab (1) for installation

  1. Turn the ignition switch to the run position.
  2.  
  3. Install the park lock cable into the back of the I/P.
  4.  
  5. Align the park lock cable locking tab (1) with its slot in the ignition switch and snap the cable into the switch. The locking tab should be facing downward at the 6 o'clock position.
  6.  
  7. Route the park lock cable back to its original position.
  8.  
  9. Connect the park lock cable to the park lock cam on the shifter and slide the cable housing into the shifter.
  10.  
  11. If equipped, install the anti-theft plate and tamper proof fastener to the shifter using the special tool.
  12.  
  13. Install the console trim plate.
  14.  

  1. Remove the camshaft sensor electrical connector.
  2.  
  3. Remove the camshaft retaining bolt.
  4.  
  5. Remove the camshaft sensor.

    Click image to see an enlarged view

    Fig. Removing CMP Sensor

  6.  

To install:


NOTE
 Inspect the camshaft sensor O-ring for wear or damage. If a problem is found, replace the O-ring.

  1. Lubricate the camshaft O-ring with engine oil.
    CAUTION
     Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2.  
  3. Install the camshaft sensor and retaining bolt. Tighten the retaining bolt to 10 Nm (89 inch lbs.).
  4.  
  5. Reconnect the camshaft sensor electrical connector.
  6.  
  7. Operate the engine and inspect the camshaft sensor for engine oil leaks.
  8.  

 
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