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Impact Sensor: Service and Repair

FRONT IMPACT SENSOR - REMOVAL

WARNING:
- To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.
- To avoid serious or fatal injury, never strike or drop the front impact sensor, as it can damage the impact sensor or affect its calibration. The front impact sensor enables the system to deploy the front supplemental restraints. If an impact sensor is accidentally dropped during service, the sensor must be scrapped and replaced with a new unit. Failure to observe this warning could result in accidental, incomplete, or improper front supplemental restraint deployment.




1. Disconnect and isolate the battery negative cable. Wait two minutes for the system capacitor to discharge before further service.
2. Remove the two screws (2) that secure the right or left front impact sensor (1) to the back of the right or left radiator support vertical member (4).
3. Disconnect the headlamp and dash wire harness connector (3) from the sensor connector receptacle.
4. Remove the right or left front impact sensor from the engine compartment.

SIDE IMPACT SENSOR - REMOVAL

WARNING:
- To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.
- To avoid serious or fatal injury, never strike or drop the side impact sensor, as it can damage the impact sensor or affect its calibration. The side impact sensor enables the system to deploy the side curtain supplemental restraints. If an impact sensor is accidentally dropped during service, the sensor must be scrapped and replaced with a new unit. Failure to observe this warning could result in accidental, incomplete, or improper side supplemental restraint deployment.

NOTE: Side impact sensors are used only on vehicles equipped with the optional side curtain airbags.




1. Disconnect and isolate the battery negative cable. Wait two minutes for the system capacitor to discharge before further service.
2. Remove the scuff plate trim from the right or left front door opening sill (5).
3. Lift the floor carpet upward from the sill far enough to access the side impact sensor on the floor panel (4) below the right or left outboard front seat adjuster riser.
4. Remove the two screws (2) that secure the side impact sensor (3) to the floor panel.
5. Disconnect the body wire harness connector (1) from the sensor connector receptacle.
6. Remove the sensor from the floor panel.

FRONT IMPACT SENSOR - INSTALLATION

WARNING:
- To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.
- To avoid serious or fatal injury, never strike or drop the front impact sensor, as it can damage the impact sensor or affect its calibration. The front impact sensor enables the system to deploy the front supplemental restraints. If an impact sensor is accidentally dropped during service, the sensor must be scrapped and replaced with a new unit. Failure to observe this warning could result in accidental, incomplete, or improper front supplemental restraint deployment.




1. Position the right or left front impact sensor (1) into the engine compartment.
2. Reconnect the headlamp and dash wire harness connector (3) to the sensor connector receptacle.
3. Carefully position the sensor onto the back of the right or left radiator support vertical member (4). Be certain that the anti-rotation pin on the back of the sensor is engaged in the center clearance hole of the radiator support and the arrow on the sensor label is pointed forward in the vehicle.
4. Install and tighten the two screws (2) that secure the sensor to the back of the support vertical member. Tighten the screws to 10 N.m (90 in. lbs.).
5. Do not reconnect the battery negative cable at this time. The Supplemental Restraint System (SRS) verification test procedure should be performed following service of any SRS component.

SIDE IMPACT SENSOR - INSTALLATION

WARNING:
- To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.
- To avoid serious or fatal injury, never strike or drop the side impact sensor, as it can damage the impact sensor or affect its calibration. The side impact sensor enables the system to deploy the side curtain supplemental restraints. If an impact sensor is accidentally dropped during service, the sensor must be scrapped and replaced with a new unit. Failure to observe this warning could result in accidental, incomplete, or improper side supplemental restraint deployment.

NOTE: Side impact sensors are used only on vehicles equipped with the optional side curtain airbags.




1. Position the side impact sensor (3) near the floor panel (4) below the right or left outboard front seat adjuster riser.
2. Reconnect the body wire harness connector (1) to the sensor connector receptacle.
3. Carefully position the sensor onto the floor panel. Be certain that the anti-rotation pin on the back of the sensor is engaged in the center clearance hole of the floor panel and the arrow on the sensor label is pointed toward the outboard side of the vehicle.
4. Install and tighten the two screws (2) that secure the sensor to the inner B-pillar. Tighten the screw to 8 N.m (75 in. lbs.).
5. Restore the floor carpet over the side impact sensor on the floor panel to the right or left front door opening sill (5).
6. Reinstall the scuff plate trim onto the right or left front door opening sill.
7. Do not reconnect the battery negative cable at this time. The Supplemental Restraint System (SRS) verification test procedure should be performed following service of any SRS component.
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