3309540 - E3051 ELECTRIC REAR WINDOWS - Description

Description

The rear door electrically-operated windows can be operated by switches on the front driver's door or switches located on each of the rear doors.

The electric windows are operated automatically for opening and manually for closing, depending on how the switch is pressed:

• the operation is manual (the glass goes up/down only when the button is pressed) when the button is held down for 60 to 300 milliseconds;
• the operation is instead automatic (the glass continues to go up/down to the end of travel, even if the button is released) when the button is held down for over 300 milliseconds;
• if the button is pressed again during movement of the glass, the glass is stopped instantly;
• if the button is pressed for less than 60 milliseconds, it is ignored (it is considered to have been knocked accidentally).

For safety reasons, a special lock switch on the driver's door cuts off power to all switches to prevent accidental activation from the rear seats, e.g. when children are present.This operating logic is controlled by the integrated services control unit.

The control unit also carries out a series of safety checks:

• The stopping of the electric windows (switching off the electric supply to the motor) is determined when the glass reaches the end of travel at top or bottom, or if an obstacle blocks the glass. This is regulated by checking the motor current.
• if there are faults on the electrical circuits, the control unit switches the system off temporarily (for example if the motor control signals are interrupted or if the absorbed current is below the usual values);
• if there is a fault in the control buttons (short circuit, or buttons jammed in the pressed position), the control unit switches the system off temporarily.

The control circuit for the rear electric windows is protected by two specific fuses located in the luggage compartment junction unit.The control switch symbols are lit when the key is turned to MAR.