Crime Guard 328i3 Installation Manual page 31

Vacuum Doorlocks Using The Optional DLS-V & 2 Relays
Black Wire
(if present)
to Ground
Pneumatic
Actuator
with built-in
electrical
switch
The connection point may be in either kick
panel or at the supply pump itself, which is
located in the trunk or under the rear seat.
Used With Crime Guard 328i
older Mercedes Benz vehicles and consists of electrical switches (built into
pneumatic actuators) which supply 12 volts or ground to a pneumatic pump.
The switches are operated when the doors are locked or unlocked by the
inside doorlock knob or the key in the exterior doorlock cylinders. The
polarity supplied by the switch determines if the pump sends vacuum or
pressure through hoses to the actuator. Since the pump must operate for
about 3 seconds, the doorlock pulse must be changed (Programmable Fea-
ture #11). An alternative interface for vacuum doorlock systems is to add an
actuator to one of the doors.
Technically, the vacuum doorlock system can be described as a hybrid
of all of the three basic power doorlock types; the vehicles activation wire
reverses polarity, with Negative operating the pump to lock the doors, and
Positive voltage operating the pump to unlock the doors.
Doorlock Diagram #9
Relay Relay
DLS-V
White
wire
Cut
Page - 31
+
12
Green
Volts
wire
To
Ground
This doorlock system is used on
3 & 533i 3 :
DLS-V Red
connector
plugs into the
control
module's Red
port.
Pneumatic Pump-
supplies vacuum
or pressure which
operate Actuators
to lock & unlock
doors & trunk