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Air Bag Control Module: Service and Repair





Inflatable Restraint Sensing and Diagnostic Module Replacement

Removal Procedure

Caution: Do not strike or jolt the inflatable restraint sensing and diagnostic module (SDM). Before applying power to the SDM, make sure that it is securely fastened with the arrow facing toward the front of the vehicle. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.

Caution: When carrying an undeployed inflator module:
- Do not carry the inflator module by the wires or connector.
- Make sure the air bag opening points away from you.
When storing an undeployed inflator module:
- Make sure the air bag opening points away from the surface on which the inflator module rests.
- Provide free space for the air bag to expand in case of an accidental deployment.
- When storing a steering column, do not rest the column with the air bag opening facing down and the column vertical. Lay the column on its side.
Failure to observe these guidelines may result in personal injury.

1. Disable the SIR system. Refer to SIR Disabling and Enabling Service and Repair.






2. Remove the drivers seat. Refer to Front Seat Replacement - Bucket Seat Replacement - Front Bucket.
3. Remove the driver side door sill plate. Refer to Front Side Door Sill Trim Plate Replacement Service and Repair.
4. Fold back the carpet to access the inflatable restraint sensing and diagnostic module (SDM).






5. Remove the connector position assurance (CPA) (1) from the inflatable restraint sensing and diagnostic module (SDM) wiring harness connector (2).
6. Push down the flex lock button (3) and slide the connector locking cover (4) to the open position.






7. Disconnect the SDM wiring harness connector (1) from the SDM (3).
8. Remove the SDM mounting fasteners.
9. Remove the SDM from the vehicle.

Important: The following repair procedures should only be used in the event that the inflatable restraint sensing and diagnostic module (SDM) mounting studs and/or fasteners are damaged to the extent that the SDM may no longer be properly mounted.

10. Repair the fasteners using the following procedure:
10.1 Remove the stripped nut and discard the nut.
10.2 Drill out the weld spots to the weld stud from the floor pan side, then remove and discard the stud.
10.3 Condition the floor panel attaching surface where the new stud is to be installed.
10.4 Install new weld stud GM P/N 115115602 and clamp the weld stud.
10.5 Migweld the stud at the drilled holes from above or below the floor pan, as required.
10.6 Apply body sealer GM P/N 9984248 around any exposed openings.
10.7 Install a new fastener GM P/N 11515933.

Installation Procedure

1. Remove any dirt, grease, or other contaminants from the mounting surface.






2. Install the SDM (3) horizontally to the vehicle.
3. Point the arrow on the SDM toward the front of the vehicle.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the SDM mounting fasteners.

Tighten
Tighten fasteners to 10 Nm (89 lb in).

5. Connect the SDM wiring harness connector (1) to the SDM.






6. Push down the flex lock button (3) and slide the connector locking cover (4) to the close position.
7. Install the connector position assurance (CPA) (1) to the inflatable restraint sensing and diagnostic module (SDM) wiring harness connector (2).
8. Position the carpet to cover the inflatable restraint sensing and diagnostic module (SDM).
9. Install the door sill plate. Refer to Front Side Door Sill Trim Plate Replacement Service and Repair.
10. Install the driver seat. Refer to Front Seat Replacement - Bucket Seat Replacement - Front Bucket.

Important: The AIR BAG indicator may remain ON after the SDM has been replaced. DTC B1001 may set requiring the SDM part number to be set in multiple modules. If the indicator remains ON after enabling the SIR system, perform the diagnostic system check and follow the steps thoroughly to ensure that the SDM is set properly.

11. Enable the SIR system. Refer to SIR Disabling and Enabling Service and Repair.
12. Refer to Inflatable Restrain Sensing and Diagnostic Module Programming and Setup Programming and Relearning.


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