The alarm system is controlled by alarm
control unit
M30
integral with the siren.
The control unit is supplied directly by
the battery at pin 3 of connector A from the line protected by fuse
F17
and at pin 7 of connector B (supply for the direction indicators) from
the line protected by fuse
F8
; both fuses are located in
junction unit B1.
An ignition-operated power supply (INT/A)
reaches pin 12 of connector B of control unit
M30
. through
a line protected by fuse F5 of control unit B1.
Pin 9 of connector A is earthed.
Control unit
M30
controls door closure
via switches
N50, N55, N51, N56,
which send an earth signal
to pins 8, 15, 9 and 16 of connector B respectively when the door
is open (the same switches turn on the door open indication leds
(
See E2510 COURTESY LIGHTS
).
The bonnet lid is controlled by switch
I10
,
which is connected to pin 18 of connector B, while the boot lid
is controlled by switch
I11
, which is connected to pin 17
of connector B (the same switch turns on the boot light:
See E2520 GLOVE COMPARTMENT LIGHT - LUGGAGE COMPARTMENT LIGHT
- SUN VISOR LIGHT
).
Volumetric sensor unit
K62
receives
supply and earth signals from pins 8 and 11 of connector A of
M30
,
and sends on the alarm control signal to pin 12 of connector A of
M30
.
Pin 1 of connector A of
M30
sends
alarm led control signal
E40
.
Pins 1 and 2 of connector B of
M30
produce control signals for turn signals (
See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
).
Remote control receiver
M35
is supplied
directly from the battery at pin 3.
An ignition-operated power supply (INT/A)
reaches pin 7 of
M35
via a line protected by fuse
F5
of control unit
B1
.
Pin 4 is earthed.
M35 (pins 5 and 6) issue door lock and door
release signals (
See E3040 CENTRAL LOCKING
).
Control unit
M30
and receiver
M35
are both equipped with a self-diagnostic system that may be used
by connecting to connector
R10
, pin 11. This receives signals
from pin 6 of connector A of
M30
and from pin 2 of remote
control receiver
M35
.
This serial line also acts as a connection
between
M30
and
M35
.