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Air Bag Control Module: Service and Repair

RESTRAINTS CONTROL MODULE (RCM)

Restraints Control Module (RCM):




Removal and Installation

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 in which the center tunnel area has been damaged, inspect the mounting and bracket for deformation. If damaged, the RCM must be replaced whether or not the air bags have deployed. In addition, make sure the area of the RCM mounting is restored to its original condition.
- 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.
- Vehicle sensor orientation is critical for proper system operation. If a vehicle equipped with an air bag supplemental restraint system (SRS) is involved in a collision, inspect the sensor mounting bracket and wiring pigtail for deformation. Replace and properly position the sensor or any other damaged supplemental restraint system (SRS) components whether or not the air bag is deployed.
- To reduce the risk of personal injury, do not use any memory saver devices.

CAUTION:
- When installing a new RCM, it is necessary to carry out programmable module installation (PM).
- 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.
- 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 perform the diagnostic procedure again.

All vehicles
1. Carry out the steps necessary to prepare for programmable module installation (PM).
2. Depower the system. See DEPOWERING AND REPOWERING.

Vehicles with high-series floor console
3. Remove the floor console. See FLOOR CONSOLE.

Vehicles with a consolette
4. Remove the consolette tray mat.
5. Remove the 4 screws and remove the consolette tray.

All vehicles




6. Disconnect the small RCM electrical connector.
7. Disconnect the large RCM 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.

8. Remove the 3 bolts and the RCM.

Installation

All vehicles

WARNING: The tightening torque of the RCM to bracket retaining bolts is critical for correct system operation.




1. Install the RCM and the 3 bolts.

Tightening torque :12 N.m (1.2 kgf.cm, 9 ft.lbf)




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

CAUTION: Putting the large RCM electrical wiring connector into the RCM on an angle can cause bad electrical connection and damage components.

NOTE: The RCM has been removed for clarity.

CAUTION: Do not push the connector to 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.




3. Position the large RCM electrical connector into the RCM.
- With the large RCM electrical connector uniformly aligned to the RCM, lightly push in until a subtle audible click is heard and 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 small RCM electrical connector

Vehicles with a consolette
6. Install the consolette tray and the 4 screws.
7. Install the consolette fray mat.

Vehicles with high-series floor console
8. Install the floor console. See FLOOR CONSOLE.

All Vehicles
9. Repower the SRS. Do not prove out the SRS at this time. See DEPOWERING AND REPOWERING.
10. When installing a new RCM, carry out the steps necessary to complete programmable module installation (PMI).
11. Prove out the supplemental restraint system (SRS) as follows.
Turn the ignition switch from ON to OFF, Wait 10 seconds, then turn the ignition switch back to ON and visually monitor the are bag indicator with the air bag modules installed.

The air bag indicator will light continuously for approximately 6 seconds and then turn OFF. If an air bag SRS fault is present, the air bag indicator will:
- fail to light.
- remain lit continuously.
- flash at a 5 Hz rate (RCM not configured). The air bag indicator might not light until approximately 30 seconds after the ignition switch has been turned from the OFF to the ON position. This is the time required for the RCM to complete the testing of the SRS. If the air bag indicator is inoperative and the SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps if this occurs, the air bag indicator and the SRS fault discovered must be diagnosed and repaired.

Clear all continuous diagnostic trouble codes (DTCs) from the RCM and occupant classification sensor (OCS) module using the IDS or equivalent tester.
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