BMW X3 2005

Locks & Lock Systems

Print

Power Door Locks



Diagnosis & Testing

The control modules have a built-in diagnostic system which continuously monitors internal functions as well as input and output signals. The central locking system is a distributed system which stores Diagnostic Trouble Codes (DTCs) in different control modules depending on where the fault occurred.

A Diagnostic Trouble Code (DTC) is stored if a control module detects a fault in a connected component. If for some reason a fault disappears after the Diagnostic Trouble Code (DTC) has been stored in a control module, information about the fault remains in the control module.

  1. Check for any current or stored DTCs that are related to the central locking system and specifically to the power door locks.
  2.  

Removal & Installation
Door Lock Motor

CAUTION
Some vehicles are equipped with an air bag system. The system must be disarmed before performing service on, or around, system components, the steering column, instrument panel components, wiring and sensors. Failure to follow the safety precautions and the disarming procedure could result in accidental air bag deployment, possible injury and unnecessary system repairs.


WARNING
Some models are equipped with side airbags mounted on the door trim panel. Do not use sharp-edged tools to remove the door panel. There is a risk of damage to the airbag.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
    NOTE
    The window must be in the uppermost position.

  4.  
  5. Remove or disconnect the following:

    Pry out airbag emblem (1) and clip (2) with special tool 00 9 317 and remove screw underneath
     
    Pry out clip (3) and the cover on door handle (4). Remove screws underneath

    Click image to see an enlarged view

    Fig. Hidden screws revealed for removal of door panel

     
    Start unclipping door trim panel at bottom with trim panel wedge tool 00 9 317
     
    Carefully unclip door trim panel at top from retainers
     

  6.  
  7. On models with side airbag, disconnect plug connection on side of airbag.
  8.  
  9. Disconnect remaining plug connections.
  10.  
  11. Remove door panel.
  12.  
  13. Disconnect Bowden cable at bottom (1) and top (3) from door lock (2).
    NOTE
    Bowden cable must be correctly located in mounts on door lock (2). Seal (4) must be correctly positioned on Bowden cable.



    Click image to see an enlarged view

    Fig. Bowden cable routing for removal and installation of power door lock

  14.  
  15. Unlock plug connection (1) at lugs (2) and detach from door lock (3).

    Click image to see an enlarged view

    Fig. Location of electrical connection

  16.  
  17. Remove screws holding door lock (1).
  18.  
  19. Remove door lock (2) from inside the door frame by pulling it into corner (3).
  20.  
  21. Disconnect power door lock from paddle of lock cylinder and remove from door.

    Click image to see an enlarged view

    Fig. Working inside door frame to remove door lock

  22.  

To install:

  1. Install or connect the following:

    Power door lock to paddle of lock cylinder
     
    Install screws to hold door lock in position. Tighten to 88 inch lbs. (10 Nm).
     
    Bowden cable routing
     
    Electrical connections to power door lock and side air bag (if equipped)
     
    Door panel at top, then bottom pressing clips into place
     
    Screws for door handle. Tighten to 72 inch lbs. (8 Nm)
     
    Screw under air bag emblem. Tighten to 72 inch lbs. (8 Nm)
     
    Negative battery cable
     

  2.  

Door Lock Switch
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Carefully pry out rocker switch (1) with special tool 00 9 341 at specified points.
  6.  
  7. Pull door lock switch (1) out of door trim panel (2).
  8.  
  9. Disconnect associated plug connection and remove door lock switch (1).

    Click image to see an enlarged view

    Fig. Switch module removal with special tool 00 9 341

  10.  

To install:

  1. Connect associated plug connection for door lock switch.
    NOTE
    Make certain that retaining hooks (1) of rocker window switch (2) are not damaged.

  2.  
  3. Correctly seat the switch by carefully pressing it into place.

    Click image to see an enlarged view

    Fig. Switch module installation

  4.  

 
label.common.footer.alt.autozoneLogo