Description And Operation: Operation

The electric windows will operate in power modes 6 (ignition on) and 7 (engine running), and for five minutes after the ignition is switched off provided none of the doors are opened.

When a window open or closed selection is made, the related door module supplies power to the window motor to drive it in the appropriate direction. In the inch mode, the motor stops when the switch is released or the window reaches the end of its travel. In the one-shot mode, the motor stops when if the switch is operated again (either up or down) or the window reaches the end of its travel.

When the passenger window switches are used, they produce an open or close request by completing a circuit with the related door module.

When the driver window switches are used, the driver door switchpack outputs a request message for the appropriate door module on the LIN bus. If the message is for a door module on the opposite side of the vehicle to the driver, the DDM relays the message to the PDM on the medium speed CAN bus. If necessary, the PDM then sends a LIN bus message to the RDM on its side of the vehicle.

If any of the passenger windows have opposing up and down requests from two separate switches, for example, a passenger window switch and the related window switch on the driver door switchpack, then the operation of that window will cease, until one or both of the switches are released.

While the isolator switch engaged, the switch tell-tale is illuminated and the rear door modules ignore requests from their related passenger window switches.

Global opening and closing requests are output from the CJB on the medium speed CAN bus. The DDM and the PDM then relay the request to their respective RDM.

ONE-SHOT WINDOW OPERATION RESET

If the battery is disconnected or discharged, or the power supply to a door module is interrupted, one-shot window operation is disabled until the window position is re-established by the affected door module(s). To reset one-shot window operation:

1. Close the window fully.
2. Release the switch, then pull up and hold the switch for one second.
3. If necessary, repeat the procedure for the other windows.

ANTI-TRAP PROTECTION

The anti-trap feature is incorporated for all of the door windows in both the inching and one-shot modes. If the anti-trap function is activated while a window is closing, the window motor reverses for 0.5 second.

Each window motor has a Hall sensor to enable the related door module to monitor the motor speed. If the motor speed decreases below a set threshold, indicating an obstruction, the power feed to the motor is reversed so the window goes back down.

If it is still necessary to raise the window, the anti-trap protection can be overridden by attempting to close the window at intervals of less than 10 seconds. On the third attempt the window will move up with increased force to try and overcome the obstruction. If the obstruction cannot be overcome, one-shot operation is disabled.