3315562 - E2031 REAR FOG LAMPS - Functional description
Functional description
The main beams are controlled by electronic Check device
M45
,
that 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 device
M45
receives as an input
the signal for rear fog lamps switched on by the button located
in unit
H35
- pin 10 of connector A; this signal only arrives
if the side lights are on. If, in addition to this signal, there
is also the dipped beam headlamps on signal - pin 6 of connector
B - or front fog lamps on signal - pin 2 of connector A, the device
M45
then sends the supply to the rear fog lamps in the central rear
lights clusters
F35
(left) and
F36
(right), from
pin 10 and pin 4 respectively of connector E of
M45
.
At the same time, a signal is sent from
pin 3 of connector B to the unit
H35
to light up the LED
near the button indicating the 'rear fog lamps on' function.
The supply for this LED for
H35
is controlled by the ignition (INT/A) via fuse
F5
of junction
unit
B1
; this line allows the control panel
H35
to be lit up when controlled by the ignition (INT/A).
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
.