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Air Bag Control Module: Service and Repair

RESTRAINTS CONTROL MODULE (RCM)







Removal

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.
- 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, a new RCM must be installed whether or not the air bags have deployed. In addition, make sure the area of the RCM is restored to its original condition. Failure to follow this procedure may result in serious personal injury.
- To reduce the risk of personal injury, do not use any memory saver devices. Failure to follow this procedure may result in serious personal injury.

CAUTION:
- Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.
- When installing a new restraints control module (RCM), it is necessary to carry out programmable module installation (PMI). Programming and Relearning

NOTE:
- The air bag warning indicator illuminates when the restraints control module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.
- 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 supplemental restraint system (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. If installing a new restraints control module (RCM), carry out the steps necessary to prepare for programmable module installation (PMI).
2. Depower the system.
3. Remove the floor console.







4. Disconnect the selector lever cable from the ball stud located on the shifter and remove the cable from the retaining clips.
5. Remove the 4 bolts (2 each side) from the inner floor console support bracket.
6. Remove the bolts from the inner floor console bracket support-to-instrument panel.
7. Disconnect the electrical connectors from the front inner floor console support bracket.
8. Remove the inner floor console support bracket.







9. Press to release the locking tab and disconnect the small RCM electrical connector.







10. 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.

11. Remove the 3 bolts and the RCM.

Installation

1. WARNING: The tightening torque of the air bag RCM retaining bolts is critical for correct system operation. Failure to follow this procedure may result in serious personal injury.

Install the restraints control module (RCM) and the 3 bolts.
- Tighten to 12 Nm (9 lb-ft).







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







3. CAUTION: Placing the large restraints control module (RCM) electrical wiring connector into the RCM on an angle, may cause bad electrical connections and damaged components.

Position the large RCM electrical connector into the RCM.

- CAUTION: Do not push the connector to the point 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. Failure to follow these instructions may cause component or connector damage.

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.
6. Install the inner floor console support bracket.
7. Install the 4 bolts (2 each side) to the inner floor console support bracket.
- Tighten to 12 Nm (9 lb-ft).

8. Install the screws to the inner floor console bracket support-to-floor instrument panel.
- Tighten to 12 Nm (9 lb-ft).

9. Install the selector lever cable in the selector lever housing.

10. NOTE: When installing the selector lever cable, make sure that the selector lever cable locking tabs are locked in place and the cable end is snapped onto the ball stud. Press the selector lever cable into the bracket and listen for the cable to click in place. Pull back on the selector lever cable to make sure that it is locked into the bracket. Also make sure that the selector lever cable end is correctly installed onto the ball stud. Pull back on the selector lever cable end to make sure that the cable end is correctly installed.

Connect the selector lever cable end to the floor shifter.

11. Attach the electrical connectors to the front inner floor console support bracket.
12. Install the floor console.
13. Repower the supplemental restraint system (SRS). Do not prove out the SRS at this time.
14. When installing a new RCM, carry out the steps necessary to complete programmable module installation (PMI).
15. Prove out the 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 air bag indicator with the air bag modules installed. The air bag warning 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 warning 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 a SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps. If this occurs, the air bag warning indicator and any 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 a scan tool.
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