Theory Of Operation

WARNING: This page is about a different car, the 2014 Fiat 500c and 2014 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

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 (Special tool #8443-25, 56 Way ACM Adapter) provides a test point as well as a method for opening the shorting bar connections within the harness connector. The thorax airbag is seat mounted on the outboard side of the seat back frame. The thorax airbag is a single stage device. The thorax side airbags and the side curtain airbags deploy together during an event separate of the front airbags.