125002242 - E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - FUNCTIONAL DESCRIPTION

Functional description

The heated rear windscreen relay T11, located in the underdashboard control unitB2, controls the simultaneous activation of the defrosting function for both the heated rear windscreenP55- line protected by fuse F40 - and the external rear view mirrorsP60 andP61and the defrosting resistors for the rearscreen washerO50and051- line protected by fuse F41.The supply for the coil for relayT11 is ''controlled by the ignition'' (INT/A) and is energized by an earth signal coming from the Body Computer M1 - pin 6 of connector F;this signal is sent according to the complex control logic described previously and, in particular, when a signal arrives, via the CAN, coming from the climate control system control unitM70(heated rear windscreen button pressed or MAX-DEF function on); the feedback signal for lighting up the LED is sent to the control unitM70via the CAN line.The low outside temperature signal, which switches on the automatic defrosting, detected by a sensor inside the external rear view mirrorP60, also reaches the control unit in the doorH44 via the CAN line.