Caliber L4-2.0L VIN B (2007)
Air Bag Control Module: Description and Operation
Description
DESCRIPTION
The Occupant Restraint Controller (ORC) (4) is sometimes referred to as the Airbag Control Module (ACM). The ORC is mounted on the tunnel floor
pan in front of the transmission floor shifter.
The Occupant Restraint Controller (ORC) is secured with three nuts to a stamped steel mounting bracket welded onto the top of the floor panel
transmission tunnel beneath the instrument panel floor console. 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 printed on the label 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 of the four corners. Two electrical connectors exit the
rearward facing side of the ORC housing. These connect the ORC to the vehicle electrical system, one from the instrument panel wire harness and the
second from 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 airbags. The ORC cannot be repaired or adjusted and, if damaged or
ineffective, it must be replaced.
