Power Windows (RPO AXC/AXE)

Power Windows Description and Operation (RPO AXC/AXE)

Power Window System Components

The power window system consists of the following components:

* Driver door lock/window switch

* Body control module (BCM)

* Passenger door lock/window switch

* Rear door power window switches

* Power window motors in each of the doors (circuit breaker protected)

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 positions 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.

Driver Power Window Operation RPO AXE

The switch for the driver power window has 4 positions; up, down, express up and express down and its position is a direct input into the driver door lock/window switch. When the driver power window motor module receives a serial data message from the driver door lock/window switch, the driver power window motor module will apply power and ground to the driver door window motor to move the window as requested.

The driver door contains a window motor that is a smart motor and will detect excessive resistance while performing the express up function and automatically reverse direction to prevent injury to any occupants that may become trapped between the closing window and the door frame. The automatic reverse safety feature can be overridden by pulling and holding the window switch.

Front Passenger Power Window Operation RPO AXC

The switch for the front passenger power window has 4 positions; up, down, express up and express down and its position is a direct input into the passenger door lock/window switch. When the passenger power window motor module receives serial data message from the passenger door lock/window switch, the passenger power window motor module will apply power and ground to the passenger door window motor to move the window as requested.

The front passenger power window can also be operated from the driver master control. The right front window switch on the driver master control has 4 positions up, down, and express up and express down and its position is a direct input into the driver door lock/window switch. Upon receiving a request for front passenger power window operation, the driver door lock/window switch transmits a serial data message indicating the changed switch position to the BCM which then sends a command to the passenger door lock/window switch. When the passenger door lock/window switch receives a passenger door window switch request from the BCM, it will send a command to the passenger power window motor module which will apply power and ground to the passenger door window motor to move the window as requested.

The passenger door contains a window motor that is a smart motor and will detect excessive resistance while performing the express up function and automatically reverse direction to prevent injury to any occupants that may become trapped between the closing window and the door frame. The automatic reverse safety feature can be overridden by pulling and holding the window switch.

Front Passenger Power Window Operation Without RPO AXC

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 passenger door lock/window switch, when the switch is pushed down or pulled up, the logic circuit within the passenger power window switch will provide power and ground to the window motor causing the window to open or by reversing polarity, the window will close.

The front passenger power window can also be operated from a switch on the driver master control. When the right front window switch on the driver master control is pushed down or pulled up, it's position is signaled to the BCM via the driver door lock/window switch. When the BCM receives this command the appropriate signal is sent to the passenger door lock/window switch which will provide power and ground to the window motor causing the window to open or close.

Rear Passenger Power Window Operation

The rear passenger power window switches have their own battery voltage and respective grounds, when the switch is pushed down or pulled up, the logic circuit within the rear passenger power window switch will provide power and ground to the window motor causing the window to open or by reversing polarity, the window will close.

The rear passenger power windows can also be operated from switches on the driver master control. When the rear passenger window switches on the driver master control are pushed down or pulled up, their position is signaled to the BCM via the driver door lock/window switch. When the BCM receives this command the appropriate signal is sent to the rear door window switch which will provide power and ground to the window motor causing the window to open or close.

Rear Power Window Lockout Operation

The rear window lockout function is operated from the driver master control, when the rear window lockout switched is pressed, an indicator light will illuminate and a serial message will be sent to the BCM via the driver door lock/window switch. When the BCM receives a lockout command, the rear door power window switches are disabled. Once activated, the rear power window switches will be disabled until the ignition switch is cycled or the switch is pressed again to enable the rear window switches.