Directed Electronics Nissan Owner's Installation Manual page 27

type E: electrically-activated vacuum
This system is found in Mercedes-Benz and Audi 1985 and
newer. The door locks are controlled by an electrically activated
vacuum pump. The control wire will show (+)12V when doors
are unlocked and (-) ground when locked.
note: The system must be programmed for 3.5-second
door lock pulses, and the violet jumper between the #87
lock terminal and the #87 unlock terminal must be cut.
Contact READY REMOTE technical support. See
Programming section.
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