Circuit/System Description
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The front door, rear door and middle door power window motors communicate with the driver door module (DDM), passenger door module (PDM) and rear door modules and middle door modules through a serial data message. The motors contain a logic module which must be normalized or programmed any time the window motor is serviced to provide proper operation and communication between door modules and window motors.