Air Bag Control Module: Service and Repair

RESTRAINTS CONTROL MODULE (RCM)







Removal

WARNING:
- If a vehicle has been in a crash, inspect the restraints control module (RCM) and the impact sensor (if equipped) mounting areas for deformation. If damaged, restore the mounting areas to the original production configuration. A new RCM and sensors must be installed whether or not the air bags have deployed. Failure to follow these instructions may result in serious personal injury or death in a crash.
- Always tighten the fasteners of the restraints control module (RCM) and impact sensor (if equipped) to the specified torque. Failure to do so may result in incorrect restraint system operation, which increases the risk of personal injury or death in a crash.

CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage can result.

NOTE:
- When installing a new restraints control module (RCM), always make sure the correct RCM is being installed. If an incorrect RCM is installed, erroneous DTCs will result.
- The air bag warning indicator illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.
- The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- Repair is made by installing a new part only. If the new part does not correct the condition, install the original part and carry out the diagnostic procedure again.

1. Depower the SRS.
2. If equipped, remove the floor console.
3. If equipped, remove the 20 percent front seat cushion. Pull up to release the retainers on the 20 percent front seat cushion and remove.
4. Disconnect the RCM large electrical connector.
1 Pinch the thumb tab and pivot the connector position assurance lever all the way back until it stops.
2 Pull out and disconnect the RCM electrical connector.







5. Disconnect the RCM small electrical connector.
6. Remove the RCM bolts.
7. Remove the RCM.

Installation
1. Position the RCM and install the bolts.
- Tighten to 12 Nm (9 lb-ft).

2. Make sure the connector position assurance lever is in the full RELEASE position before attempting to connect the connector.







3. CAUTION: Putting the large restraints control module (RCM) electrical connector into the RCM on an angle can cause bad electrical connections and damage components.

NOTE: The RCM has been removed for clarity.

Position the large RCM electrical connector into the RCM.

- CAUTION: Do not push the connector on to where the lever pivots and seats itself. Light pressure is needed to get the connector into position on the restraints control module (RCM) before using the lever to fully seat the connector.

With the large RCM electrical connector uniformly aligned to the RCM, lightly push in until a subtle audible click is heard and a slight resistance is felt.







4. Connect the large RCM electrical connector.
- Using the connector position assurance lever, pivot it toward the RCM, drawing the connector into the RCM.
- Make sure the thumb tab is engaged to the retainer on the RCM and locked in place.







5. Connect the RCM small electrical connector.
6. If equipped, install the floor console.
7. If equipped, install the 20 percent front seat cushion. Align the retainers on the 20 percent seat cushion and press down firmly near the front of the cushion to seat the retainers.
8. Repower the SRS.