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Air Bag Control Module: Service and Repair




Restraints Control Module (RCM)













Removal

WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy(R) and cause serious personal injury or death.

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.

NOTICE: When installing a new Restraints Control Module (RCM), it is necessary to carry out Programmable Module Installation (PMI). For additional information, refer to Information Bus. Failure to follow these instructions may result in component damage and/or system failure. Programmable Module Installation (PMI)

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 air bag warning indicator illuminates when the correct RCM fuse is removed and the ignition is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

1. If installing a new RCM, carry out the steps necessary to prepare for Programmable Module Installation (PMI). For additional information, refer to Information Bus.

2. Depower the SRS. For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures.

3. Remove the front floor console. For additional information, refer to Instrument Cluster / Carrier &/or Interior Moulding / Trim.

4. Disconnect the large RCM electrical connector.

1. Pinch the thumb tab and pivot the large RCM electrical connector position assurance lever all the way back until it stops.

2. Pull out and disconnect the large RCM electrical connector.





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

6. Remove the 3 RCM nuts.

7. Remove the RCM.

Installation

1. Install the RCM.

2. Install the 3 RCM nuts.
- Tighten to 12 Nm (106 lb-in).

3. Connect the small RCM electrical connector.

4. NOTE: The RCM has been removed for clarity.

On the large RCM electrical connector, place the connector position assurance lever in the full release position.





5. NOTICE: Putting the large electrical connector into the Restraints Control Module (RCM) on an angle may cause bad electrical connections and damage components.

Position the large electrical connector into the RCM.





6. Connect the large RCM connector.
- NOTICE: 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. Damage to the connector or component may occur.

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

- 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.





7. Install the front floor console. For additional information, refer to Instrument Cluster / Carrier &/or Interior Moulding / Trim.

8. Repower the SRS. Do not prove out the SRS at this time. For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures.

9. When installing a new RCM, carry out the steps necessary to complete Programmable Module Installation (PMI). For additional information, refer to Information Bus.

10. 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 warning 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 SRS fault is present, the air bag warning 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 warning indicator is inoperative and an 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 DTCs from the RCM and Occupant Classification System Module (OCSM) using a scan tool.

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