SIR Front End Discriminating Sensor Replacement

CAUTION: Be careful when you handle a sensor. Do not strike or jolt a sensor. Before applying power to a sensor:
^ Remove any dirt, grease, etc. from the mounting surface.
^ Position the sensor horizontally on the mounting surface.
^ Point the arrow on the sensor toward the front of the vehicle.
^ Tighten all of the sensor fasteners and sensor bracket fasteners to the specified torque value.

Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

REMOVAL PROCEDURE




1. Disable the SIR system. Refer to Disabling the SIR System.
2. Remove the 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. Remove the mounting fasteners.
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 may no longer be properly mounted.

7. Use the following procedure to repair fasteners:
7.1. Remove and discard the fastener.
7.2. Chisel off the damaged weld nut.
7.3. Condition the front end lower tie surface where the new weld nut is to be installed.
7.4. Install the new weld nut (IP/N 11514034) or equivalent into position.
7.5. Migweld the new weld nut to the front end lower tie surface in the correct location.
7.6. Use the new fastener (IP/N 11515926) or equivalent.

INSTALLATION PROCEDURE




1. Install the inflatable restraint front end discriminating sensor to the front end lower tie surface and ensure that the arrow is pointing toward the front of the vehicle.

NOTE: Refer to Fastener Notice in Service Precautions.




2. Install the inflatable restraint front end discriminating sensor mounting fasteners.

Tighten
Tighten fasteners to 8 N.m (71 lb in).




3. Connect the inflatable restraint front end discriminating sensor 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 off road skid plate (if equipped).
6. Enable the SIR system. Refer to Enabling the SIR System.