Grand Cherokee 4WD V8-4.7L Flex Fuel (2009)
Impact Sensor: Service and Repair
Impact Sensor - Installation
Front
FRONT
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.
WARNING: 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 Restraint System (SRS) components. 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 SRS component deployment.
NOTE: The front and the side impact sensors are interchangeable.
1. Position the right or left front impact sensor (2) into the engine compartment.
2. Carefully position the sensor onto the stud on the bracket (4) on the back of the right or left radiator support vertical member (3). Be certain that
the anti-rotation pins on the sensor are engaged in the clearance holes of the bracket.
3. Install and tighten the nut (1) that secures the sensor to the stud. Tighten the nut to 8 Nm (70 in. lbs.).
4. Reconnect the headlamp and dash wire harness connector (5) to the sensor connector receptacle.
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. See: Service and Repair.
Side - B-Pillar
SIDE - B-PILLAR
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.
WARNING: 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 Supplemental Restraint System (SRS) components. 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 SRS component deployment.
NOTE: The front and the side impact sensors are interchangeable.
