Power Windows Operation

The vehicle is equipped with power windows controlled by the door modules. Each passenger door window can be operated, either from a power window switch built into the driver door switch assembly (DDSA), or, from a power window switch mounted locally to the associated door. The driver door window can be operated only from the driver door power window switch built into the DDSA.

When the driver door window is operated, the DDSA interprets the switch request and sends it to the DDM. The DDM examines the request and checks to see if it has received any class 2 serial data messages from any of the other vehicle modules prohibiting the movement. If no prohibitive messages have been received, the DDM applies battery voltage and ground to the driver door window motor to move the window as requested.

When a passenger door module, PDM, LRDM, or RRDM, receives a window switch request from, either the DDSA, or the window switch mounted locally to its door, the passenger door module examines the request and checks to see if it has received any messages from any of the other vehicle modules prohibiting the movement. If no prohibitive messages have been received, the passenger door module applies battery voltage and ground to the associated window motor to move the window as requested.