Air Bag Control Module: Service and Repair
REMOVAL AND INSTALLATIONWARNING:
- THE AIRBAG CONTROL MODULE CONTAINS THE IMPACT SENSOR, WHICH ENABLES THE SYSTEM TO DEPLOY THE AIRBAG. BEFORE ATTEMPTING TO DIAGNOSE OR SERVICE ANY AIRBAG SYSTEM OR RELATED STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENTS YOU MUST FIRST DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE. THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE FURTHER SYSTEM SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO DO THIS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
- NEVER STRIKE OR KICK THE AIRBAG CONTROL MODULE, AS IT CAN DAMAGE THE IMPACT SENSOR OR AFFECT ITS CALIBRATION. IF AN AIRBAG CONTROL MODULE IS ACCIDENTALLY DROPPED DURING SERVICE, THE MODULE MUST BE SCRAPPED AND REPLACED WITH A NEW UNIT.
1. Disconnect and isolate the battery negative cable. If the airbag has not been deployed, wait two minutes for the system capacitor to discharge before further service.
2. Pull back the carpet from the floor pan transmission tunnel area under the heater-A/C housing floor duct and forward of the center floor console.
Acceleration Switch Remove/Install:
3. If the vehicle is equipped with the optional anti-lock brake system, remove the acceleration switch and mounting bracket from the floor pan transmission tunnel.
NOTE: Always remove and replace the airbag control module and its mounting bracket as a unit. Replacement modules include a replacement mounting bracket. Do not transfer the module to another mounting bracket.
Airbag Control Module Remove/Install:
4. Remove the four screws that secure the Airbag Control Module (ACM) mounting bracket to the floor pan transmission tunnel.
5. Slide the ACM and mounting bracket out from under the heater-A/C housing floor duct far enough to access the wire harness connector.
Airbag Control Module Connector Removal:
6. Unplug the ACM wire harness connector. To unplug the wire harness connector from the ACM:
a. Pull the two white locks out about 3 mm (0.125 in.) from each side of the connector.
b. Squeeze the two connector latch tabs between the thumb and forefinger.
c. Pull the connector out of the ACM receptacle.
7. Remove the ACM and mounting bracket from the vehicle as a unit.
8. When installing the ACM, position the unit with the arrow on the ACM housing pointing forward.
9. Plug in the wire harness connector to the ACM. Be certain that the connector latches are fully engaged and that the connector locks are pushed in.
10. Attach the ACM to the floor pan transmission tunnel with the four mounting screws. Tighten the mounting screws to 10.7 N.m (95 in. lbs.).
11. Reverse the remaining removal procedures to complete the installation.
12. Do not connect the battery negative cable at this time. See Airbag System in the Diagnosis and Testing for the proper procedures.