The stop lights 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 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
and pin 2 of connector C; pin 7 of connector C is earthed
C21.
The switch
l30 is supplied when the ignition
is switched on (INT/A) on pin 1 from the line of fuse F1 and at
pin 4 of fuse F5 of unit B1;
when the brake pedal is pressed,
the switch closes and sends the activation signal to pin 1 of connector
B of
M45
.
The check device also controls - pin 7 and
pin 5 of connector E - the supply to the side stop lights in the
rear lights clusters
F30
ed
F31
and connector E
of the centre rear light cluster
F40
from pin 8.
The unit
M45 checks the efficiency of
the bulbs and relevant 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 25 of connector A supplies an ignition-operated supply
to the panel through fuse
F1
of 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 unit
M45
, via pin 6 connector
A, is also connected to the diagnostic multi-connector (see E8010).
The braking signal to switch
l30 is sent
from the switch also to the ABS system (see E7020 - ABS) and to
the engine management control unit (see E5030 - ELECTRONIC MANAGEMENT
FOR PETROL ENGINES or E5050 - ELECTRONIC MANAGEMENT FOR DIESEL ENGINES).