Theory Of Operation
WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 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.