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Home >> Dodge or Ram Truck >> 2004 >> RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN C >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Restraints and Safety Systems >> Air Bag Control Module >> Service and Repair >> Airbag Control Module

Airbag Control Module

REMOVAL

WARNING:
- ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, SIDE CURTAIN AIRBAG, 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 AND POSSIBLE PERSONAL INJURY.
- THE AIRBAG CONTROL MODULE CONTAINS THE IMPACT SENSOR, WHICH ENABLES THE SYSTEM TO DEPLOY THE FRONT SUPPLEMENTAL RESTRAINTS. NEVER STRIKE OR DROP 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. FAILURE TO OBSERVE THIS WARNING COULD RESULT IN ACCIDENTAL, INCOMPLETE, OR IMPROPER FRONT SUPPLEMENTAL RESTRAINT DEPLOYMENT AND POSSIBLE OCCUPANT INJURIES.

1. Disconnect and isolate the battery negative cable. Wait two minutes for the system capacitor to discharge before further service.
2. On models with a manual transmission, remove the floor console from the top of the floor panel transmission tunnel.
3. On models with an automatic transmission, remove the ACM cover from the instrument panel. (Refer to RESTRAINTS/ACM COVER - REMOVAL).

Fig. 8 Airbag Control Module Remove/Install:




4. Reach through the rearward facing opening below the instrument panel center stack support bracket on the top of the floor panel transmission tunnel to access and disconnect the instrument panel wire harness connector for the Airbag Control Module (ACM) from the connector receptacle located on the rearward facing side of the module. To disconnect the instrument panel wire harness connector from the ACM:
a. Slide the red Connector Position Assurance (CPA) lock on the top of the connector toward the side of the connector.
b. Depress the connector latch tab and pull the connector straight away from the ACM connector receptacle.

5. From the right side of the floor panel transmission tunnel, loosen each of the two screws that secure the right side of the ACM to the bracket on the floor panel transmission tunnel about 7 millimeters (0.25 inch).
6. From the left side of the floor panel transmission tunnel, remove the two screws that secure the left side of the ACM to the bracket on the floor panel transmission tunnel.
7. Still working from the left side of the floor panel transmission tunnel, lift the ACM upward far enough to disengage the locating pins on the bottom of the ACM mounting flanges from the locating holes in the bracket, then slide the ACM toward the left far enough to disengage the slotted holes in the right ACM mounting flanges from under the heads of the two previously loosened right mounting screws.
8. Remove the ACM from the left side of the floor panel transmission tunnel.

INSTALLATION

WARNING:
- ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, SIDE CURTAIN AIRBAG, 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 AND POSSIBLE PERSONAL INJURY.
- THE AIRBAG CONTROL MODULE CONTAINS THE IMPACT SENSOR, WHICH ENABLES THE SYSTEM TO DEPLOY THE FRONT SUPPLEMENTAL RESTRAINTS. NEVER STRIKE OR DROP 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. FAILURE TO OBSERVE THIS WARNING COULD RESULT IN ACCIDENTAL, INCOMPLETE, OR IMPROPER FRONT SUPPLEMENTAL RESTRAINT DEPLOYMENT AND POSSIBLE OCCUPANT INJURIES.

1. Position the Airbag Control Module (ACM) to the left side of the floor panel transmission tunnel near the ACM bracket. When the ACM is correctly positioned, the arrow on the ACM housing will be pointed forward in the vehicle.
2. From the left side of the floor panel transmission tunnel, slide the ACM toward the right far enough to engage the slotted holes in the right ACM mounting flanges under the heads of the two previously loosened right mounting screws, then engage the locating pins on the bottom of the ACM mounting flanges into the locating holes in the bracket.
3. Still working from the left side of the floor panel transmission tunnel, install and tighten the two screws that secure the left ACM mounting flanges to the bracket that is welded onto the floor panel transmission tunnel. Tighten the screws to 14 Nm (10 ft. lbs.).
4. From the right side of the floor panel transmission tunnel, tighten each of the two screws that secure the right side of the ACM to the bracket on the floor panel transmission tunnel. Tighten the screws to 14 Nm (10 ft. lbs.).
5. Reach through the rearward facing opening below the instrument panel center stack support bracket on the top of the floor panel transmission tunnel to access and reconnect the instrument panel wire harness connector for the ACM to the connector receptacle located on the rearward facing side of the module. Be certain that the latch and the red Connector Position Assurance (CPA) lock on the connector are each fully engaged.
6. On models with an automatic transmission, reinstall the ACM cover onto the instrument panel. (Refer to RESTRAINTS/ACM COVER - INSTALLATION).
7. On models with a manual transmission, reinstall the floor console onto the top of the floor panel transmission tunnel.
8. 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 RESTRAINTS - STANDARD PROCEDURE - VERIFICATION TEST).
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