Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The location of the anchor buckle tensioner is at the base of the B-pillar. The anchor buckle tensioner is an internal part of the seat belt retractor. 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. Use of the (special tool #8443A, SRS Load Tool) in the tests below substitutes a suspect squib with a known good component. The provides a test point as well as a method for opening the shorting bar connections within the ORC harness connector. The anchor buckle tensioners can not be repaired and if ineffective or damaged the entire anchor buckle unit is to be replaced. Following any front airbag deployment the anchor buckle tensioners will also be replaced.