Theory Of Operation

When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and wiring. These circuits are maintained in a "floating" configuration at the ORC (connected to neither power nor ground) as protection against inadvertent deployment. The ORC uses the adaptive load limiter to adjust the belt resistance based upon impact data, to reduce the force of the tightened seat belt on the chest of the front passenger seat occupant, reducing the potential for injuries. The adaptive load limiter cannot be repaired and, if ineffective or damaged, the entire front seat belt and retractor unit must be replaced. If the front airbags have been deployed, the adaptive load limiter has also been deployed. An adaptive load-limiting device is integral to the front passenger seat belt retractor to supplement the anchor buckle and retractor tensioners. The adaptive load limiter is controlled by the Occupant Restraint Controller (ORC). The front passenger retractor has a two pyrotechnic initiators, one for the adaptive load limiter and one for the tensioner. The adaptive load limiter initiator is connected to the vehicle electrical system through a dedicated take out of the body wire harness by a keyed and latching yellow molded plastic connector insulator to ensure a secure connection. The adaptive load limiter is not intended for reuse and must be replaced following any front airbag deployment. Refer to RETRACTOR, SEAT BELT, REMOVAL .