Description

DESCRIPTION





Figure 1 OCCUPANT RESTRAINT CONTROLLER - TYPICAL






The Occupant Restraint Controller (ORC) (Figure 1) is also sometimes referred to as the Airbag Control Module (ACM).


The ORC is secured with screws to a stamped steel mounting bracket welded onto the top of the floor panel transmission tunnel just behind and underneath the instrument panel center stack in the passenger compartment of the vehicle (Figure 2). 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.






Figure 2 ORC LOCATION






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. the ORC has two molded plastic electrical connectors that exits the right facing side of the ORC housing. These terminal pins connect the ORC to the vehicle electrical system.


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 curtain airbags. The ORC cannot be repaired or adjusted and, if damaged or faulty, it must be replaced.