The power window system consists of the following components:

The power window system will operate anytime the retained accessory power (RAP) system is active or when the ignition switch is in the ACCY or ON position.

The DDS contains window switches which are integrated into the control module switch assembly. The DDS contains switches for the driver, passenger, left rear and right rear 3 position rocker type switches, with detents for up, down, and express down. The DDS rear window lockout switch is a rocker type switch that provides an active signal to the DDS whenever pressed. Whenever the rear window lockout switch is pressed the DDS will send a signal to the BCM which will activate or deactivate the rear window switches depending on the current state, and illuminate the switch indicator whenever the function is active.

The PDS contains a single power window switch that is an integral component of the switch control module. Closing of this normally open, rocker switch provides the PDS with a request for the front passenger power window operation. The switch for the front passenger window has 3 positions up, down and express down. Each of these switch positions is a direct input to the PDS.

The rear passenger door power window switches are normally open, 3 position rocker type switches, with detents for up and down and express down. Each switch receives signals from the BCM control which will command the rear windows up, down, express down, switch enable, or switch disable.

The midgate power window switch is a normally open, 2 position rocker type switch with detents for express up and express down. When pressed, contacts within the switch are closed which allows voltage to flow through the switch to the midgate window motor which will respond by moving the window in the express up or express down direction depending upon which direction the switch is pressed.

The global window switch is a normally open, 2 position rocker type switch with detents for up and express down. When pressed, a signal is sent to the DDS which will send a command to the PDS, BCM and midgate window motor which will respond by moving their respective window in the up or express down direction.

The switch for the driver power window has 3 positions Up, Down and Express Down and its position is a direct input into the DDS. Upon receiving a request for power window operation (switch activation), the DDS supplies voltage to the driver window motor up or down circuit and grounds the opposite circuit and the power window motor runs to move the window up or down.

The switch for the front passenger power window has 3 positions Up, Down and Express Down, and its position is a direct input into the PDS. Upon receiving a request for power window operation (switch activation), the PDS supplies voltage to the passenger window motor up or down circuits and grounds the opposite circuit and the power window motor runs to drive the window up or down.

The front passenger power window can also be operated from the DDS. The right front window switch on the DDS has 3 positions Up, Down and Express Down and its position is a direct input into the DDS. Upon receiving a request for front passenger power window operation, the DDS transmits a serial message to the PDS indicating the changed switch position. When the PDS receives this message, the PDS will command the passenger window motor to move in the direction requested.

The switches for the left and right rear power windows has 3 positions Up, Down and Express Down. When the switch is pressed, the rear window switch supplies voltage to its respective window motor up, down, or express down circuit and grounds the opposite circuit and the power window motor runs to move the window up or down.

The BCM monitors the window UP/DOWN/EXPRESS DOWN commands from the DDS. When the rear window UP, DOWN or EXPRESS DOWN command is received, the BCM sends a signal to the appropriate rear window switch. The rear window switches continuously monitor the up, down and express down signal circuits, if no function is being commanded, the signal voltage is at approximately B+ voltage. If the UP, DOWN or EXPRESS DOWN function is commanded, the BCM signal voltage drops approximately 5 volts and the appropriate rear window switch will then command the window in the direction requested.

The global window switch provides the ability for the operator to globally command all power windows to open or close. A reference voltage is supplied to the global window switch from the DDS. In the inactive state, the voltage within the signal circuits are zero, but when the switch is operated to the up or express down position the switch will close and allow voltage to flow through the signal circuit. The DDS detects the voltage within the signal circuit and will send a serial data message to the PDS, BCM and midgate window motor the request for up or express down window movement. The PDS and midgate window will respond to the request and command their respective windows to move in the direction commanded. The BCM will send a message to the left rear and right rear window switches which in turn will command their respective windows to move in the direction commanded.

The BCM monitors the window lockout command from the DDS. When the rear window switch operation is authorized, the BCM sends a signal to the rear window switches allowing for normal window operation from the rear switches. If the rear window lockout function is commanded, the BCM signal voltage drops approximately 5 volts which disables the rear window switches and the rear windows will only operate when the BCM receives a command from the DDS. The lockout feature will remain in effect until the ignition switch is cycled or the driver enables the rear windows by pressing the rear window lockout switch again.

The midgate power window is controlled by the midgate module using inputs from the midgate window switch, the DDS and the midgate latches. The midgate window switch is a 2 position rocker switch for EXPRESS DOWN and EXPRESS UP functions. The midgate window switch circuits are referenced from ground by the midgate module and are determined to be active when high. The midgate module also uses inputs from 2 Hall effect sensors located on the motor. The hall sensors enable the module to monitor the window position and motor speed and to auto reverse when an obstruction is detected during the window close operation.

The midgate module monitors the voltage level on the midgate ajar signal circuit, when the midgate is fully closed, the left and right midgate ajar switches are closed causing the ajar signal voltage to be near zero. The midgate module detects the low voltage level on the ajar signal circuit and will allow normal operation of the midgate window. If either the left or right midgate switch is open, as is an ajar condition, the ajar signal will be at or near B+ voltage and the midgate module will prohibit midgate window operation.

There are 3 signal circuits for the midgate window module, UP, EXPRESS DOWN and EXPRESS UP. When the midgate window switch is pressed, voltage flows through the closed contacts within the window switch and through the appropriate signal circuit. The midgate module detects the voltage within the signal circuit and will command the midgate window to move in the direction requested. The midgate module also may receive a command from the global window switch (via the DDS) for UP or EXPRESS DOWN functions. The express down signal circuit is shared between the midgate window switch and the global window switch, the up signal circuit is used by the global window switch only and the express up signal circuit is used by the midgate window switch only.