© 1998 Directed Electronics, Inc. Vista, CA
15
N438 7/98
Type E - Mercedes-Benz and Audi (1985 & Newer)
Door locks are controlled by an electrically activated vacuum pump. Some Mercedes and Audis use a Type D sys-
tem. Test by locking doors from the passenger key cylinder. If all the doors lock, the vehicle's door lock system can
be controlled with just two relays (optional). The control wire can be found in either kick panel and will show (+)12V
when doors are unlocked and (-) ground when doors are locked. To interface see diagram below. The system must
be programmed for 3.5 second door lock pulses (see Operation-Settings Learn Routine
™
).
Type F - One-Wire System
This system usually requires a negative pulse to unlock, and cutting the wire to lock the door. In some vehicles,
these are reversed. It is found in late-model Nissan Sentras, some Nissan 240SX, and Nissan 300ZX 1992-up. It
is also found in some Mazda MPV's and some Mitsubishi's. One relay (optional) is used to interface to this type of
system as follows:
FACTORY SWITCH
H 2/A GREEN(-) LOCK WIRE
(+) 12V CONSTANT FUSED
85
86
30
87 87A
DIA-30
H 2/C (-) BLUE UNLOCK WIRE
FACTORY LOCK MODULE
X
X
CUT
CONNECTION WHEN
DOORS ARE LOCKED
CONNECTION WHEN
DOORS ARE UNLOCKED
85
86 30
87 87A
H2/A GREEN (-)
LOCK WIRE
(3.5 sec.)
DIA-29
85
86 30
87 87A
(-) CHASSIS GROUND
CONTROL WIRE IN CAR
(+) 12V
CONSTANT FUSED
H 2/C BLUE (-)
UNLOCK WIRE
(3.5 sec.)
TO THE DOOR
TO ELECTRIC
VACUUM PUMP
X
X
CUT
(+) 12V
CONSTANT FUSED
