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 module (connected to neither power nor ground) as protection against inadvertent deployment. Use of the (special tool #8443A, SRS Load Tool) in the tests below substitutes a suspect squib with a known good component. The use of the provides a test point as well as a method for opening the shorting bar connections within the harness connector. The Front Driver Knee Bag is mounted in the instrument panel behind the knee bolster, below the steering column, it is a single stage device.