HHR 2006-2008

Locks & Lock Systems

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Power Door Locks



Diagnosis & Testing

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located. Inspect for aftermarket devices which could affect the operation of the system. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. Faulty electrical connections or wiring may be the cause of intermittent conditions.

The fuse labeled, DR LCK, supplies battery positive voltage to the Body Control Module (BCM) for the door lock system. The BCM supplies and monitors a reference voltage to the door lock switch through the door lock switch lock/unlock signal circuit. The door lock switch also receives a constant ground source. If a door lock switch is placed in the lock position, the reference voltage is taken directly to ground and the BCM senses 0.0 volt on the signal circuit. If a door lock switch is placed in the unlock position, the reference voltage is taken to ground through a 1.5k ohm resistor that is internal to the door lock switches and senses approximately 2.9 volts on the signal circuit. This is how the BCM determines what portion of the door lock switch was activated.

The BCM, upon receipt of a door lock switch lock or unlock signal, will switch the appropriate door lock actuator control circuits to battery positive voltage. The opposing side of the door lock actuators are connected to ground internally within the BCM through the other door lock actuator control circuit and the doors will lock or unlock appropriately.

Vehicles without keyless entry have 2 internal drivers in the BCM to control the door lock actuators-all door lock and all door unlock.

Vehicles equipped with keyless entry have 3 internal drivers in the BCM-driver door unlock, passenger door unlock, and all door lock. This is done to isolate the driver door lock actuator so it can be unlocked by itself using the keyless entry transmitter.

Removal & Installation
Door Lock Motor


Click image to see an enlarged view

Fig. Remove the upper extension trim panel

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the upper extension trim panel assembly (1) by pulling the clip retainers (2) free.

    Click image to see an enlarged view

    Fig. Remove the armrest pull cup

  4.  
  5. Remove the armrest pull cup:
    1. Remove the door panel pull cup trim plate (1).
    2.  
    3. Remove the retaining screws (2).
    4.  
    5. Remove the pull cup assembly (3).
    6.  
    7. Disconnect the electrical connector.
    8.  

  6.  
  7. Remove the manual window crank handle, if equipped. Use the J 9886-01 door handle clip remover to remove the crank handle.

    Click image to see an enlarged view

    Fig. Disconnect the inside door handle cable: inside door handle cover (1), handle screw (2), door handle assembly (3), door handle cable (4)

  8.  
  9. Disconnect the inside door handle cable:
    1. Remove the inside handle cover (1).
    2.  
    3. Remove the handle screw (2).
    4.  
    5. Push the handle assembly (3) toward the rear of the vehicle and disconnect the door handle cable (4).

      Click image to see an enlarged view

      Fig. Remove the side door trim panel assembly (2): the 2 Push Pins (1), the door trim retainers (3)

    6.  

  10.  
  11. Remove the side door trim panel assembly (2):
    1. Disconnect the 2 Push Pins (1).
    2.  
    3. Disconnect the door trim retainers (3).
    4.  
    5. Remove the side door trim panel assembly.
    6.  

  12.  
  13. Carefully pull the water deflector away from the door while feeding any wiring or connectors through the water deflector.

    Click image to see an enlarged view

    Fig. Remove the front side door lock screws (1) & the door lock assembly (2)

  14.  
  15. Remove the 3 front side door lock screws (1) and the door lock and motor assembly (2)
  16.  

To install:

  1. Install or connect the following:

    The door lock and motor assembly
     
    The 3 front side door lock screws. Tighten to 89 inch lbs. (10 Nm)
     
    The water deflector carefully feeding any wiring or connectors through the water deflector
     
    The side door trim panel assembly pushing the retainers into place
     
    Connect the inside door handle assembly to the door handle cable
     
    The handle screw. Tighten to 18 inch lbs. (2 Nm)
     
    The inside handle cover
     
    The manual window crank handle, if equipped
     
    The electrical connector to the armrest pull cup
     
    The screws for the door panel pull cup. Tighten to 18 inch lbs. (2 Nm)
     
    The door panel pull cup trim plate
     
    The upper extension trim panel assembly pushing the clip retainers into position
     

  2.  

Door Lock Switch


Click image to see an enlarged view

Fig. Remove the armrest pull cup

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the armrest pull cup:
    1. Remove the door panel pull cup trim plate (1).
    2.  
    3. Remove the retaining screws (2).
    4.  
    5. Remove the pull cup assembly (3).
    6.  
    7. Disconnect the electrical connector.

      Click image to see an enlarged view

      Fig. Removal of the power door lock switch (1)

    8.  

  4.  
  5. Removal of the power door lock switch (1).
  6.  
  7. Disconnect the electrical connector.
  8.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Tighten the screws for the door panel pull cup to 18 inch lbs. (2 Nm).
  4.  

 
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