Theory Of Operation
WARNING: This page is about a different car, the 2014 Dodge Journey. 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. During this test, the squibs discovered are checked for agreement with the pre-programmed vehicle configuration of components assigned to the module. The ORC still monitors Squib circuits that are unused even though the module is not pre-programmed for those Squibs.