3315603 - E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Functional description (Right hand drive)
Functional description
The heated rear window relay
J55
controls the simultaneous switching on of the demisting function
of the rear window
P55
, the heated windscreen
P56
and the external rearview mirrors
P60
and
P61
.(The
control circuit of the heated rear window
P55
passes through
the power source/amplifier aerial
P25
-
See E3510 RADIO
)
The supply line to the latter is also protected
by the mirror demister fuse
B16
.
The relay
J55
is supplied by the
direct line from the battery through the fuse
B33
.
An earth signal from the electronic Check
device
M45
- pin 10 of connector C - energizes the coil
of relay
J55
, so supply is sent to the resistors of
P55
,
P56
,
P60
and
P61
: this signal is enabled
and suitably time-lagged by the device
M45
.
The ignition-operated supply (INT/A) of
the Check device
M45
reaches through fuse
F1
of
junction unit
B1
to pin 9 of connector C: pin 7 of connector
C is earthed.
The device
M45
gives enablement
to the time-lagged switching on of the rear window when it receives
the command from the on/off button - pin 11 of connector A - and
at the same time the engine rpm signal is present - pin 8 of connector
B, coming from the instrument panel
E50
: enablement takes
place if the engine speed is above 1000 rpm.
The button which switches on the heated
rear window function is in the climate control panel
H80
:
the command is sent to the climate control unit
M70
- pin
13 of connector C - from pin 9 through the serial line.
The control unit
M70
is supplied
- to pin 11 of connector B - from the ignition-controlled line (INT/A)
of relay
R1
protected by fuse
F9
of junction unit
B1
:
pin 8 of connector C is earthed. From pin 9 of connector B of
M70
,
the command is sent to the Check device
M45
- pin 11 of
connector A.
With the function switches on, the Check
device
M45
sends a signal, from pin 2 of connector B, to
light up the LED which signals the engagement of the function: the
signal reaches pin 11 of connector C of
M70
and from there
the controls
H80
.