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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 404 (Occupant Restraint Controller (Orc) - DTCS B212C-13 To U1415-00 - 2500HD & 3500HD) >> Diagnosis And Testing >> B274C-13-Driver Side Seat Thorax Squib 1 Control - Circuit Open >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. 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 the 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 SRS Load Tool in the tests below, substitutes a suspect squib with a known good component. The use of the SRS Load Tool Adapter provides a test point, as well as a method for opening the shorting bar connections within the harness connector (special tool #8443A, SRS Load Tool) (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool).

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