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Air Bag Control Module: Service and Repair


Restraints Control Module (RCM)

Special Tool(s)










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 airbags have deployed. Failure to follow these instructions may result in serious personal injury or death in a crash.
- 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 and cause serious personal injury or death.

NOTE:
- The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.
- The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

1. When installing a new RCM, carry out the appropriate steps necessary for the Programmable Module Installation (PMI) procedure.
2. Depower the SRS. For additional information, refer to Supplemental Restraint System (SRS) Depowering and Repowering.
3. Access the RCM.
- Remove the 20 percent seat, if equipped.
- Remove the floor console, if equipped.
- Remove the floor consolette, if equipped.

4. NOTICE: To avoid damage to the wiring harnesse(s) underneath, lift the carpet before cutting between the perforations. Failure to follow this instruction may result in component damage and/or system failure.

If equipped, position the carpet aside:
- Reach through the perforations and lift the carpet.
- Cut between the perforations in the carpeting as shown.
- Fold back the carpet flap to gain access to the RCM.







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







6. Disconnect the large RCM electrical connector.
1. Pinch the thumb tab and pivot the Connector Position Assurance (CPA) lever all the way back until it stops.
2. Pull out and disconnect the RCM electrical connector.







7. Remove the 3 bolts and the RCM.

Installation

1. WARNING: 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.

Install the RCM and the 3 bolts.
- Tighten to 12 Nm (106 lb-in).

2. Before attempting to connect the connector, make sure the large RCM CPA lever is in the full release position.







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

Position the large RCM electrical connector into the RCM.

- NOTICE: 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 Restraints Control Module (RCM) before using the lever to fully seat the connector. Failure to follow this instruction may result in component damage and/or system failure.

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 CPA 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. If equipped, position back the carpet flap and tuck it back in place in the carpeting to cover the RCM.
7. Install the seat or console.
- Install the floor consolette, if equipped.
- Install the floor console, if equipped.
- Install the 20 percent seat, if equipped.

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 in the General Procedures portion of this section.
9. If a new RCM was installed, carry out the appropriate steps in the Programmable Module Installation (PMI) procedure.
10. If a new RCM was installed on a vehicle with Roll Stability Control (RSC(R)) or trailer sway control, calibrate the Anti-Lock Brake System (ABS) module. Connect the scan tool and carry out the IVD Initialization sequence.
11. Prove out the SRS as follows:
Turn the ignition from ON to OFF. Wait 10 seconds then turn the ignition ON. Monitor the air bag warning indicator with the air bag modules installed. The air bag warning indicator lights continuously for approximately 6 seconds and then turn off. If an air bag SRS fault is detected, the air bag warning indicator will:
- fail to light.
- remain lit continuously.
- flash.

The flashing might not occur until approximately 30 seconds after the ignition is turned from OFF to the ON position. This is the time required to complete testing of the SRS. If the air bag warning indicator is inoperative and a SRS fault exists, a chime sounds 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 RCM CMDTCs.
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