22 © 2001 Directed Electronics, Inc. Vista, CA
Type E door locks are controlled by an electrically activated vacuum pump. Some Mercedes and Audi models use
a Type D system. 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 the diagram below. The system must be programmed for 3.5 second door lock pulses (see System
Features Learn Routine section of this guide).
This system usually requires a negative pulse to unlock, and cutting the wire to lock the door. In some vehicles,
these are reversed. Type F door locks are found in late-model Nissan Sentras, some Nissan 240SX, and Nissan
300ZX 1992-up. They are also found in some Mazda MPVs and some Mitsubishis. One relay (optional) is used to
interface to this type of system as follows:
type F: one-wire system
type E: mercedes-benz and audi (1985 & newer)
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