Impact Sensor: Service and Repair

INFLATABLE RESTRAINT FRONT END SENSOR REPLACEMENT

REMOVAL PROCEDURE
1. Disable the SIR system. Refer to sir disabling and enabling zones. Refer to SIR Disabling and Enabling Zones.

CAUTION: Refer to SIR Caution in Service Precautions.

2. Remove the engine protection shield, if equipped.




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




4. Disconnect the inflatable restraint front end discriminating sensor harness connector from the sensor.




5. Remove the mounting fasteners.
6. Remove the inflatable restraint front end discriminating sensor from the vehicle.
7. Perform the following steps in order to complete the fastener repair:
1. Remove and discard the improperly installed fastener.
2. Chisel off the damaged weld nut.
3. Condition the front end lower tie surface where the new weld nut is to be installed.
4. Install the new weld nut GM P/N 11514034 or equivalent into position.
5. Migweld the new weld nut to the front end lower tie surface in the correct
6. Use the new fastener GM P/N 11514034 or equivalent.

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

INSTALLATION PROCEDURE




1. Install the inflatable restraint front end discriminating sensor to the front end lower tie surface.
2. Install the inflatable restraint front end discriminating sensor mounting fasteners.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the screws to 10 N.m (89 lb in).




3. Connect the inflatable restraint front end discriminating harness connector to the sensor.
4. Install the connector position assurance (CPA) to the inflatable restraint front end discriminating sensor harness connector.
5. Install the engine protection shield, if equipped.
6. Enable the SIR system. Refer to SIR Disabling and Enabling Zones.