Grand Cherokee 2WD V6-3.7L (2008)
Impact Sensor: Description and Operation
Description
Front
FRONT
Two acceleration-type front impact sensors (1) are used on this vehicle, one each for the left and right sides of the vehicle. These sensors are mounted
remotely from the impact sensor that is internal to the Occupant Restraint Controller (ORC). Each front sensor is secured with a flanged hex nut to a
weld stud on the back of the right and left vertical members of the radiator support within the engine compartment.
The molded plastic impact sensor housing has an integral connector receptacle (5), two integral anti-rotation pins (3) and an integral mounting hole with
a metal sleeve (4) to provide crush protection. A cavity in the center of the sensor housing contains the electronic circuitry of the sensor, which includes
an electronic communication chip and an electronic impact sensor. A nylon cover (2) is laser-welded over the cavity to seal and protect the internal
electronic circuitry and components. The front impact sensors are each connected to the vehicle electrical system through a dedicated take out and
connector of the headlamp and dash wire harness.
The right and left front impact sensors are identical in construction and calibration. The acceleration-type front impact sensors cannot be repaired or
adjusted and, if damaged or ineffective, they must be replaced.
Side
SIDE
Four acceleration-type side impact sensors (1) are used on this vehicle when it is equipped with side curtain airbags, two each for the left and right sides
of the vehicle. These sensors are mounted remotely from the impact sensor that is internal to the Occupant Restraint Controller (ORC). Each side sensor
is secured with a screw to the inner right or left B-pillar and C-pillar beneath the interior trim within the passenger compartment.
The molded plastic impact sensor housing has an integral connector receptacle (5), two integral anti-rotation pins (3) and an integral mounting hole with
a metal sleeve (4) to provide crush protection. A cavity in the center of the sensor housing contains the electronic circuitry of the sensor, which includes
an electronic communication chip and an electronic impact sensor. A nylon cover (2) is laser-welded over the cavity to seal and protect the internal
electronic circuitry and components. The side impact sensors are each connected to the vehicle electrical system through a dedicated take out and
connector of the body wire harness.
The right and left side impact sensors are identical in construction and calibration. The acceleration-type side impact sensors cannot be repaired or
adjusted and, if damaged or ineffective, they must be replaced.
