Circuit/System Description
WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition is turned ON, the vehicle direction alert alarm warning (VDAAW) module receives the vehicle identification number (VIN) from the body control module (BCM). The VDAAW module will compare the VIN received to the VIN stored in memory.