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© 2006 directed electronics.
type B: negative-triggered, relay-driven system
This system is common in many Toyota, Nissan, Honda, and
Saturn models, as well as Fords with the keyless-entry system
(some other Fords also use Type B).
The switch will have three wires on it, and one wire will test
ground all the time. One wire will pulse (-) when the switch
locks the doors, and the other wire will pulse (-) when the switch
unlocks the doors. This type of system is difficult to mistake for
any other type.
LOCK UNLOCK
H2/7
H2/6
H2/5
H2/4
H2/3
H2/2
LOCK
RELAY
UNLOCK
RELAY
#87
#87A
#30A
#87
#87A
#30A
VEHICLE (-)
LOCK TRIGGER
CIRCUIT
VEHICLE (-)
UNLOCK TRIGGER
CIRCUIT
FACTORY LOCK
SWITCH
TO FACTORY
RELAYS
GREEN/BLACK LOCK #30 COMMON (OUTPUT)
WHITE/BLACK NOT USED
VIOLET/BLACK LOCK #87A NORMALLY OPEN (INPUT)
BROWN/BLACK NOT USED
BLUE/BLACK UNLOCK #30 COMMON (OUTPUT)
VIOLET UNLOCK #87 NORMALLY OPEN (INPUT)
15A
TO CHASSIS
GROUND
G21994_04-06.qxd 12/11/06 3:36 PM Page 18