3026168 - E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Functional description
Functional description
The heated rear windscreen relay T11, located in the underdashboard
control unit
B2
, controls the simultaneous activation of
the defrosting function for both the heated rear windscreen
P55
- line protected by fuse F40 - and the external rear view mirrors
P60
and
P61
and the defrosting resistors for the rearscreen washer
O50
and
051
- line protected by fuse F41.
The supply for the coil for relay T11 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 unit
M70
(heated rear windscreen button pressed or MAX-DEF function on);
the feedback signal for lighting up the LED is sent to the control
unit
M70
via the CAN line.
The low outside temperature signal, which
switches on the automatic defrosting, detected by a sensor inside
the external rear view mirror
P60
, also reaches the control
unit in the door
H44
via the CAN line.