Bypassing Gm Vehicle Anti-Theft Systems (Vats) - Python 950 Installation Manual

Car security

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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/n 555U. 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/n 555F can be used, except

for the following vehicles, which will require p/n 555U: '97 and newer Mark VII, and 2000 and newer

Taurus/Sable, Contour/Mystique and Focus.

bypassing GM vehicle anti-theft systems (VATS)

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

disabled for up to ten minutes. An optional "VATS pack" of resistors is available (p/n 652T). 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 BLUE status output from the relay satellite has been pro-

grammed for factory security re-arm, then use the (H3/5) BLUE/WHITE 2

to control the relay.

NOTE: When connecting to the VATS wires, it is not important which wire is cut.

BLUE OR

BLUE/WHITE

(+) 12V CONSTANT FUSED

PROPER RESISTOR VALUE

87 87A

status output from the control module

TO IGNITION KEY SWITCH

CUT

TO VATS DECODER MODULE

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