194001477 - E3051 ELECTRIC REAR WINDOWS - DESCRIPTION

The electric windows in the rear doors are activated using the switches in the actual doors and the driver''s front door.The commands from the driver''s front door are transmitted via the CAN from the control unit in the door.The boot control unit controls the operation of the rear electric window motors directly, which are operated eith manually or automatically, in accordance with the following strategy:- if the button is pressed for between 50 and 300 milliseconds (short press), operation is manual: the glass goes up/down only with the key pressed;- if the button is pressed for longer than 300 milliseconds (long press), operation is automatic: even if the button is released, the glass continues to move up/down until the end of travel position is reached or until the intervention of the anti-crush safety system (if fitted);- pressing the button again whilst the window is moving stops it in the position it is in;- if the button is pressed for less than 50 milliseconds, this is ignored (it is treated as an accidental knock).The luggage compartment junction unit also manages the anti-crush safety function: It acquires information of the possible presence of an obstacle whilst the window is closing (upwards movement, two resistive sensors inside the electric window motor which if an obstacle is encountered when the window is closing immediately interrupt the travel and reverse the direction).The anti-crush safety function is activated during both manual and automatic operation.If the boot control unit detects the presence of an obstacle in the "inversion zone" whilst the window is moving upwards, it should:- interrupt the upwards movement and reverse it immediately in a total time of 30ms.- revers the direction of the window which should reach a position corresponding to an opening of at least 200 mm from the upper edge or at least 50 mm higher than the initial starting position of the window.- ignore any type of closing or opening command during the entire reversal time.If the boot control unit detects the presence of an obstacle in the "non inversion zone" it should only interrupt the upwards movement of the window.The correct operation of the anti-crush sensor is controlled by the control unit check function: in the case of a failure this information is sent via the CAN to the instrument panel to light up the general failure warning light and show the information on the display. In addition, if there is a failure the control units should inhibit the upwards movement of the window in automatic mode.The windows are automatically opened or closed through the special prolonged (more than 2 seconds) command sent by the remote control button.The circuit is operated according to the luggage compartment junction unit control logic with a power supply protected by two special fuses operated by the underdashboard junction unit services relay: The electric window function can only be activated with the ignition ON (INT) except when the windows are closed/opened centrally via remote control and during the timed period with key off.During the starting stage, this relay is temporarily deactivated, whilst with the ignition OFF, the Body Computer keeps the relay activated for 2 minutes, but deactivates it 30 seconds after one of the doors is opened.The driver''s front door control unit also manages the locking of the rear controls (protection) when the special LOCK button is pressed: The locking status is indicated by an LED in the back of the actual button lighting up and the rear control buttons are not lit up. The electric windows cannot be operated using any of the buttons when the lock function is activated.The windows are automatically opened or closed through the special prolonged (more than 2 seconds) command sent by the remote control button.The remote control receiver aerial is inside the ignition device (TEG Reader).