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.
The supply for the Check device
M45
arrives directly from the battery (maxifuse CENTR of
B5
)
at pins 1 and 6 of connector C, via fuse
F11
of junction
unit
B1
.
The supply controlled by the ignition (INT/A)
arrives via fuse
F1
of junction unit
B1
at pin 9
of connector C: pin 7 of connector C is earhed.
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 side stop lights in the
rear lights clusters
F30
ed
F31
and connector B
of the centre rear light cluster
F40
from pin 8.
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 for the switch
I30
is sent from the switch to the ABS (
See E7020 ABS
) and to the
engine management control unit as well (
See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
or
See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
).