2889119 - E3051 ELECTRIC REAR WINDOWS - Description

Description

The electric windows in the rear doors are operated by means of switches located in each of the rear doors.

The operation of the rear windows takes place automatically, in accordance with the following logic which depends how the button is pressed.

  • for opening the windows:
  • 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 closing the windows:
  • the operation is only manual
This control logic is controlled by the specific control unit under the dashboard on the passenger side.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 current uptake is below the usual values.
  • there is a fault in the control buttons (short circuit, or buttons jammed in the pressed position
For safety reasons a special lock switch in the dashboard allows the power supply to the rear switches to be excluded to prevent accidental operation, for example, by children.The rear electrically-operated windows will work only when the key is turned to MAR.The control switch symbols are lit when the key is turned to MAR.The control circuit for the rear electric windows is protected by a specific fuse, next to the junction unit.