Impact Sensor: Service and Repair

INFLATABLE RESTRAINT FRONT END DISCRIMINATING SENSOR REPLACEMENT

REMOVAL PROCEDURE
1. Disable the SIR system. Refer to SIR Disabling and Enabling Zone 1 and to SIR Disabling and Enabling Zone 3.

CAUTION:
- Do not strike or jolt the inflatable restraint front end sensor. Before applying power to the front end sensor make sure that it is securely fastened. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
- Refer to SIR Caution in Service Precautions.

2. Remove off road skid plate, if equipped.




3. Remove the connector position assurance (CPA) from the inflatable restraint front end discriminating sensor harness connector.
4. Disconnect the inflatable restraint front end discriminating sensor harness connector from the sensor.




5. Drill out the mounting rivets.




6. Remove the inflatable restraint front end discriminating sensor from the vehicle.

IMPORTANT: The following procedures should be utilized in the event that sensor mounting holes or fasteners are damaged to the extent that the sensor can no longer be properly mounted.

7. Perform the following steps in order to complete the first fastener repair:
1. Remove and discard the improperly installed rivet.
2. Reattach sensor with new rivet.
8. Perform the following steps in order to complete the second fastener repair:
1. Remove the improperly installed rivet.
2. Enlarge the mounting holes (1) in the lower radiator support to 9.0 mm (0.35 in).
3. Insert and properly seat the rivnut.
4. Install sensor with screw.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten fasteners to 8.0 N.m (71 lb in).

INSTALLATION PROCEDURE
1. Remove any dirt, grease, or other impurities from the mounting surface.




2. Install the inflatable restraint front end discriminating sensor horizontally to the lower radiator support surface. Ensure that the arrow is pointing toward the front of the vehicle.




3. Install the inflatable restraint front end discriminating sensor mounting rivets (GM P/N 15715058).




4. Connect the inflatable restraint front end discriminating sensor harness connector to the sensor.
5. Install the connector position assurance (CPA) to the inflatable restraint front end discriminating sensor harness connector.
6. Install the off road skid plate, in equipped.
7. Enable the SIR system. Refer to SIR Disabling and Enabling Zone 1 and to SIR Disabling and Enabling Zone 3.