The main beams are controlled by electronic Check device
M45
,
which receives control signals from the switches and controls the
bulbs while also checking the various lines.
Check device
M45
is supplied directly
from the battery. (maxifuse CENTR of
B5
) to pins 1 and 6
of connector C, via fuse
F11
of junction unit
B1
.
An ignition-operated power supply (INT/A)
reaches pin 9 of connector C through fuse
F1
of junction
unit
B1
: pin 7 of connector C is earthed.
The switch
I30
is supplied when
the ignition is turned on (INT/A) from fuse line
F1
of junction
unit
B1
:when the brake pedal is pressed, the switch closes
and sends the operation signal to pin 1 of connector B of
M45
.
The supply line
I30
is also sent
to the Check device
M45
- pin 2 of connector C - which checks
its condition.
The check device also controls - pin 7 and
pin 5 of connector B - the supply to the lateral stop lights in
the rear lights clusters
F30
ed
F31
. and from pin
8 of connector B of the central rear cluster
F40
.
The device
M45
checks the efficiency
of the bulbs and their connections: if faults are detected in the
circuit, the 'lights fault' warning light on the instrument panel
E50, pin 7 of connector C, is lit from pin 6 of connector A, while
pin 15 of connector A supplies an ignition-operated power supply
to the panel through fuse
F1
of the junction unit
B1
.
In this specific case, the control unit
also checks the supply line of switch
I30
, and if necessary
indicates any faults.
The braking signal from switch
I30
is also sent from the switch to the ABS (
See E7020 ABS
) and to the
engine management control unit (
See E5030 PETROL ENGINE ELECTRONIC
MANAGEMENT
or
See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
).