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transceiver will excite the transponder, which is located (but not visible) in the head of the ignition key. The key
transponder will then send a unique code back to the transceiver for evaluation. If the code matches a
valid code of the system, the vehicle will be allowed to start. Most of these transponder-based systems can be
bypassed using p p / / n n 5 5 5 5 5 5 U U or 5 5 5 5 6 6 U U . . Some may require additional parts from the vehicle manufacturer. Consult you
dealer for the applications. For most Ford PATS transponders, as well as Lexus and Toyotas, p p / / n n 5 5 5 5 5 5 F F can be used,
except for the following vehicles, which will require p p / / n n 5 5 5 5 5 5 U U : '97 and newer Mark VII, and 2000 and newer
Taurus/Sable, Contour/Mystique and Focus.
b b y y p p a a s s s s i i n n g g G G M M v v e e h h i i c c l l e e a a n n t t i i - - t t h h e e f f t t s s y y s s t t e e m m s s ( ( V V A A T T S S ) )
Vehicles with the GM VATS (Pass Key) systems have a resistor embedded in the ignition key. If the VATS decoder
module does not measure the proper resistance when the vehicle is started, the starter and fuel pump may be dis-
abled for up to ten minutes. An optional "VATS pack" of resistors is available ( ( p p / / n n 6 6 5 5 2 2 T T ) ) . One of the resistors in the
pack will match the resistor in the key.
The VATS wires will be two very light-gauge wires coming out of the steering column. The colors of the wires vary,
but they are often contained in orange tubing - either both will be white wires, or one wire will be purple/white
and the other white/black. Determine the value of the resistor in the key. Then follow the diagram below to
bypass VATS during remote start operation. If the 3/1 BLUE status output has been programmed for factory secu-
rity re-arm, use the H3/2 BLUE/BLACK third ignition output to control the relay.
N N O O T T E E : : When connecting to the VATS wires, it is not important which wire is cut.
H3/1 BLUE OR
H3/2 BLUE/BLACK
(+) 12V CONSTANT FUSED
DIA-621
2 2 4 4
PROPER RESISTOR VALUE
87 87A
85
86
30
TO IGNITION KEY SWITCH
X
CUT
X
TO VATS DECODER MODULE
© 2004 Directed Electronics, Inc. Vista, CA
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