9-3 1999

Locks & Lock Systems

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Power Door Locks



Diagnosis & Testing
  1. Check the wiring harness, connectors and ground connections.
  2.  
  3. Measure voltage to check for open circuits by performing the following:
    1. Engage the load
    2.  
    3. Set the multi-meter to voltage measurement and connect its minus cable to a good grounding point
    4.  
    5. Connect the voltmeter positive cable to the point where the voltage is to be tested
    6.  
    7. On the output side of a switch/control module, it is best to start there and then gradually move out towards the load
    8.  
    9. The break point in the circuit has been passed when the voltage disappears
    10.  
    11. On the input side of a switch/control module/consumer, it is best to start at the closest point to the power source (often the fuse) and then gradually move towards the switch/control module/consumer
    12.  
    13. The break point in the circuit has been passed when the voltage disappears
    14.  

  4.  
  5. Measure resistance to check for open circuits by performing the following:
    1. Make sure the component or lead being tested is not carrying a current (e.g. by removing the associated fuse)
    2.  
    3. Set the multi-meter to resistance measurement and connect it across the component/lead being tested
    4.  
    5. Move the wiring harness in question while observing the ohmmeter
    6.  
    7. The resistance of the wiring harness should normally be less than 1 ohm. A specified value applies to components
    8.  

  6.  
  7. Check for short circuits to ground by performing the following:
    1. Make sure the lead being tested is not carrying a current (e.g. by removing the associated fuse) and that any load has been disengaged
    2.  
    3. Set the multi-meter to resistance measurement
    4.  
    5. Connect one test cable to a good ground and the other to the point to be tested
    6.  
    7. Carefully move the wiring harness and make sure the multi-meter shows infinite resistance (OL) the whole time
    8.  

  8.  
  9. Check components connectivity and functionality. Replace components as necessary.
  10.  

Removal & Installation
Door Lock Motor
Front Door
  1. Before servicing the vehicle, refer to the precautions.
  2.  
  3. Open the door (window must be raised).
  4.  
  5. Remove the door trim.
    1. Remove the tailgate opening button.

      Click image to see an enlarged view

      Fig. Removing the tailgate opening button, the cover on the door handle mounting and the cover on the door mirror

    2.  
    3. Undo the cover on the door handle mounting and remove the door handle.
    4.  
    5. Remove the cover on the door mirror.
    6.  
    7. Remove the door pull cover.
    8.  
    9. Undo the screw securing the door trim.
    10.  
    11. Pull off the door trim (fastened with clips) and lift it off the lock button.

      Click image to see an enlarged view

      Fig. Door trim fastener locations

    12.  

  6.  
  7. Remove the plastic water barrier.
  8.  
  9. Remove the pull rod between the door handle and the door lock from the lock.
  10.  
  11. Remove the lower section of the rear guide channel.
  12.  
  13. Remove the pull rod, between lock cylinder and lock, from the lock.
  14.  
  15. Remove the 3 retainer bolts that secure the door lock.
  16.  
  17. Remove the door lock with the internal lock assembly and central locking system motor.
  18.  
  19. Unplug the connector for the central locking system motor.
  20.  
  21. Remove the central locking system motor from the door lock, fastened with 2 screws.

    Click image to see an enlarged view

    Fig. Front door lock assembly

  22.  

To install:

  1. Installation is the reverse of removal.
  2.  
  3. Check the door handle clearance against the lock. Adjust if needed, by adjusting up/down the opening rod adjusting screw until it is up against the lock opening lever.
  4.  
  5. It must be possible to feel the clearance in the door handle, the lock opening lever must not be actuated in the resting position.
  6.  

Rear Door
  1. Before servicing the vehicle, refer to the precautions.
  2.  
  3. Open the door.
  4.  
  5. Remove the door trim.
    1. Remove the door-pull cover (fastened with clips).

      Click image to see an enlarged view

      Fig. Removing the door-pull cover (fastened with clips)

    2.  
    3. Remove the trim retaining screws in the door pull.
    4.  
    5. Remove the screws under the storage pocket.

      Click image to see an enlarged view

      Fig. Removing the retaining screws

    6.  
    7. Remove the inside door handle.
    8.  
    9. Pull off the trim (fastened with clips) and lift it over the lock button.

      Click image to see an enlarged view

      Fig. Trim panel fastener locations

    10.  

  6.  
  7. Remove the plastic water barrier.
  8.  
  9. Lift out the collision block to increase accessibility.
  10.  
  11. Remove the pull rod, between inside handle and lock, from the lock.
  12.  
  13. Remove the pull rod between lock button and lock, from the lock.

    Click image to see an enlarged view

    Fig. Remove the pull rod, between inside handle and lock, from the lock (4), the pull rod between lock button and lock, from the lock (5) and the retaining screw for the rear guide channel (6)

  14.  
  15. Remove the retaining screw for the rear guide channel.
  16.  
  17. Remove the three retainer screws from the lock.
  18.  
  19. Remove the complete lock unit.
  20.  
  21. Unplug the connector for the central lock motor.
  22.  
  23. Remove the central lock motor from the lock.

    Click image to see an enlarged view

    Fig. Remove the three retainer screws (7), the complete lock unit (8), the connector for the central lock motor (9) and the central lock motor screws (10)

  24.  

To install:

  1. Installation is the reverse of removal.
  2.  
  3. Check the door handle clearance against the lock. Adjust if needed, by adjusting up/down the opening rod adjusting screw until it is up against the lock opening lever.
  4.  
  5. Make sure the water drainage plastic is tight against the inner panel of the door and that it is not damaged.
  6.  
  7. It must be possible to feel the clearance in the door handle, the lock opening lever must not be actuated in the resting position.
  8.  

Door Lock Switch

The door lock switch is located in the center console.

  1. Before servicing the vehicle, refer to the precautions.
  2.  
  3. Remove the switch using a screwdriver or by pressing from below and pulling straight up (the switch is secured with clips).
  4.  
  5. Unplug the switch contact.
  6.  

To install:

  1. Installation is the reverse of removal.
  2.  

 
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