Durango 2WD V8-4.7L (2008)
Seat Occupant Classification Module - Air Bag: Description and Operation
Description
DESCRIPTION
The Occupant Restraint Controller (ORC) (1) is secured with three screws to a stamped steel mounting bracket welded onto the top of the floor panel
transmission tunnel just behind the front seat crossmember and beneath the center floor console in the passenger compartment of the vehicle. Concealed
within a hollow in the center of the die cast aluminum ORC housing is the electronic circuitry of the ORC which includes a microprocessor, an electronic
impact sensor, an electronic safing sensor, and an energy storage capacitor. A stamped metal cover plate is secured to the bottom of the ORC housing
with four screws to enclose and protect the internal electronic circuitry and components.
An arrow (3) printed on the label (2) on the top of the ORC housing provides a visual verification of the proper orientation of the unit, and should always
be pointed toward the front of the vehicle. The ORC housing has integral mounting flanges on three corners. The mounting flange to the right of the
connector receptacle has an integral locating pin on its lower surface. Both right side flanges have round mounting holes, while the flange on the left side
has a slotted mounting hole. A molded plastic electrical connector (4) with 2 receptacles, one containing 24 terminal pins and the other containing 32
terminal pins, exits the forward facing side of the ORC housing. These terminal pins connect the ORC to the vehicle electrical system through two
dedicated take outs and connectors of the body wire harness.
The impact sensor and safing sensor internal to the ORC are calibrated for the specific vehicle, and are only serviced as a unit with the ORC. In addition,
there are unique versions of the ORC for vehicles with or without the optional side curtain airbags. The ORC cannot be repaired or adjusted and, if
damaged or ineffective, it must be replaced.
