Theory Of Operation
WARNING: This page is about a different car, the 2016 Dodge Durango. 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 Seatbelt Buckle Pretensioner sensors. During this test, the sensors discovered are checked for agreement with the pre-programmed configuration of components assigned to the module.