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Airbag Control Module: Installation

WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment.
WARNING: To avoid personal injury or death, never strike or drop the airbag control module as it can damage the impact sensor or affect its calibration. The airbag control module contains the impact sensor, which enables the system to deploy the supplemental restraints. If an airbag control module is accidentally dropped during service, the module must be scrapped and replaced with a new unit. Failure to observe this warning could result in accidental, incomplete, or improper supplemental restraint deployment.
  1. Reconnect and latch the vehicle wire harness connector for the ACM to the ACM connector receptacle located on the left facing side of the module. See Figure.
  2. Carefully position the ACM cover base plate onto the mounting bracket that is welded onto the floor panel under the driver side front seat. See Fig 1.
    Fig 1: ACM Cover Base Plate
    GC0037580Courtesy of DAIMLERCHRYSLER CORP.
    1 - BASE PLATE
    2 - SEAT RISER
    3 - GROUND EYELET TERMINAL
    4 - ACM CONNECTOR
    5 - FLOOR PANEL
  3. Carefully position the ACM onto the ACM cover base plate. When the ACM is correctly positioned, the three ACM mounting tabs will be aligned with the holes in the cover base plate and the mounting bracket, and the orientation arrow on the ACM label will be pointed forward in the vehicle.
  4. Install and tighten the three screws that secure the ACM to the mounting bracket that is welded onto the floor panel within the driver side front seat riser. Be certain that the ground eyelet terminal is installed under the screw for the left rear mounting tab. Tighten the screws to 12 N.m (105 in. lbs.).
  5. Position the ACM cover over the ACM and press it down firmly and evenly until it snaps into position over the ACM cover base plate. See Figure.
  6. Position the control module bracket onto the top of the driver side seat riser. See Figure.
  7. Install and tighten the two screws that secure the control module bracket to the top of the seat riser under the driver side front seat. Tighten the screws to 2 N.m (18 in. lbs.).
  8. Position the cover panel onto the top of the driver side seat riser. See Figure.
  9. Install and tighten the two screws that secure the cover panel to the top of the seat riser under the driver side front seat. Tighten the screws to 2 N.m (18 in. lbs.).
  10. Move the driver side front seat back to its driving position.
  11. Do not reconnect the battery negative cable at this time. The supplemental restraint system verification test procedure should be performed following service of any supplemental restraint system component. (Refer to ELECTRICAL/RESTRAINTS - STANDARD PROCEDURE - VERIFICATION TEST) .
NOTE: If the Airbag Control Module (ACM) has been replaced with a new unit, it will be necessary to initialize the new ACM. In order to function properly, the ACM must be programmed for the correct standard and optional supplemental restraint system components installed in the vehicle. To initialize the ACM, a diagnostic scan tool is required. Refer to the appropriate diagnostic information.
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