Power Window System Operation

The driver window switch contains 4 power window switches which are integral components to the driver door lock/window switch. Closing any of the normally open switches provides the driver door lock/window switch with a request for power window operation. The switches for the driver window will have 4 positions up, down, and express up and express down, the passenger window depending upon the option configuration may have 3 or 4 positons for up, down, and express down and possibly express up while the switches for the rear windows have only 2 positions; up and down. Each of these switches and their positions is a direct input into the driver door lock/window switch. Upon receiving a request for power window operation, the driver door lock/window switch, transmits a serial data message indicating the switch and it's changed position.

The 2 rear passenger doors have their own switches. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a serial data message from the driver door lock/window switch, will send a signal to the appropriate rear window switch which will command their respective rear window motors.