Air Bag Control Module: Service and Repair
Restraints Control Module (RCM)
REMOVAL AND INSTALLATION
Removal
WARNING: The restraints control module (RCM) orientation is critical for correct air bag supplemental restraint system (SRS) operation. If a vehicle equipped with an SRS system has been involved in a collision inspect the RCM mounting area and bracket for deformation. If damaged, the RCM must be replaced whether or not the air bags have deployed. In addition, make sure the mounting area of the RCM is restored to its original condition.
WARNING: Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module. This will reduce the risk of injury in the event of an accidental deployment.
WARNING: To reduce the risk of personal injury, do not use any memory saver devices.
CAUTION: To avoid potential damage to the restraints control module (RCM), make sure the RCM and bracket assembly is secured to the floor pan and the SRS is depowered before either disconnecting or reconnecting the RCM electrical connectors.
CAUTION: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage can result.
NOTE: The air bag warning lamp 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.
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.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: 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 system. For additional information, Service and Repair
2. Remove the driver seat. For additional information, Procedures
3. CAUTION: Care must be taken to prevent damage to the RCM cover. If the RCM cover is damaged, a new cover must be installed.
Remove the restraints control module (RCM) cover.
- Pry outward on each side of the cover to disengage the clips.
- Slide the cover rearward and remove.
4. Remove the restraints control module electrical connectors.
1. Disconnect the large restraints control module (RCM) electrical connector.
- 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 large electrical connector.
5. Disconnect the small RCM electrical connector.
6. Remove the bolts and remove the RCM and bracket assembly.
Installation
WARNING: The tightening torque of the air bag restraints control module (RCM) bracket retaining nuts is critical for correct system operation.
NOTE: Inspect the RCM bracket bolts for corrosion before securing the RCM and bracket assembly to the vehicle.
1. Install the RCM and bracket assembly and tighten the bolts to specification.
2. Place the connector position assurance lever in the full release position before attempting to connect the connector.
3. CAUTION: Putting the large RCM electrical connector into the RCM on an angle can cause bad electrical connections and damaged components.
With the large RCM electrical connector uniformly aligned, lightly push in until a subtle audible click is heard and slight resistance is felt.
4. CAUTION: Do not push the connector onto where the lever pivots and seats itself. Light pressure is needed to get the connector into position on the RCM before using the lever to fully seat the connector.
Push the large electrical connector position assurance lever until the retainer engages and locks into place.
5. Align the small RCM electrical connector and push in until the connector is fully seated into the RCM.
6. Align and install the RCM cover.
7. Install the driver seat. For additional information, Procedures
8. Repower the system. For additional information, Service and Repair