The dipped beam headlamps 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
of connector C; pin 7 of connector C is earthed
C21.
The dipped beam headlamps switch on the
exterior lights control
H6
is supplied by the battery via
the MAXIFUSE CENTR of
B5
, the contact of relay
R1
of unit
B1
and the fuse
F13
it contains.
The relay is energised when the ignition
switch
H1
supplies the INT/A line.
When the switch of device
H6
closes
the contact (pin 7-8), the unit
M45
receives the positive
signal on pin 6 (connector B) via the stalk unit
H5
and
from pin 5 (connector D) it energises the coil of the relay
R1
of
B3
to switch on the dipped beam headlamps.
The contact of relay
R1
of
B3
,
via fuses
F6
and
F7
, supplies respectively the headlamps
F10
(left) and
F11
(right) on pin 1 (connector C)
or pin 6 for XENON headlamps.
The unit
M45 checks the efficiency of
the bulbs and relevant connections;
if faults are detected
on 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 provides a panel-operated supply
via the fuse
F1
of junction unit
B1
.
The unit
M45
, via pin 6 connector
D, is also connected to the diagnostic multi-connector.