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© 2001 Directed Electronics, Inc. Vista, CA
This type of door lock system usually requires a negative pulse to unlock, and cutting the wire to lock the door.
(With some vehicles, these are reversed.) It is found in the late-model Nissan Sentras, some Nissan 240SX, Nissan
300ZX 1992 and later. It is also found in some Mazda MPV's.
NOTE:
The violet jumper between the #87 lock terminal and the #87 unlock terminal must be cut.
This system is most commonly found in Ford, Mazda, Chrysler and GM vehicles. The door lock switch or door key
cylinder may contain either one or two resistors.
SINGLE-RESISTOR TYPE:
If one resistor is used in the door lock switch/key cylinder, the wire will pulse (+)12V in
one direction and less than (+)12V when operated in the opposite direction.
TWO-RESISTOR TYPE:
If two resistors are used in the factory door lock switch/key cylinder, the switch/key cylin-
der will read less than (+)12V in both directions.
DETERMINING THE PROPER RESISTOR VALUES:
To determine the resistor values, the door lock switch/key cylinder
must be isolated from the factory door lock system. For testing, use a calibrated digital multimeter that is set to ohms.
IMPORTANT:
To ensure an accurate resistance reading, do not touch the resistor or leads during testing.
type G: positive (+) multiplex
type F: one-wire system (cut to lock, ground to unlock)
