VATS

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Oct 7, 2015 | 08:26 PM

Poncho92

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Joined: Jul 2015

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VATS

Stupid question what is it and whats it do

Oct 7, 2015 | 08:33 PM

bigal55

Senior Member

iTrader: (1)

Joined: Dec 2012

Posts: 629

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From: Western NY

Car: 88 convertible

Engine: 5.7L

Transmission: 4+3 maual

Axle/Gears: 3.07

Re: VATS

Quote:

Originally Posted by Poncho92

Stupid question what is it and whats it do

Vehicle Anti-Theft System. It prevents auto theft by disabling the starter and the injectors if the incorrect key is used in the ignition switch.

Oct 7, 2015 | 08:53 PM

Ron U.S.M.C.

Supreme Member

Joined: Apr 2006

Posts: 4,482

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From: Northern, CA

Car: 1989 Iroc-Z Camaro

Engine: TBI,5.0

Transmission: Automatic 700R4

Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover

Re: VATS

I found this about VATS =
Description of VATS:

VATS is a General Motors (GM) security system that has a resistor embedded in the blade
of the key. There are 15 different resistors in the single sided configuration, and 14
different resistors in the double sided configuration. There is a three minute penalty for
using the incorrect resistor.

Normal operation is for the key, with resistor pellet, to be inserted and turned. If the correct
resistance is read, the VATS Module, through a relay, will allow the starter to crank the
engine and also send a signal to the ECM to allow the operation of the fuel injectors.
Without the correct resistor the injectors and starter are inhibited.

The security derives from the fact that there is a one-in-fourteen / fifteen chance of having
the correct resistor. The worst case scenario when the penalty is invoked (3 x 15) is 45
minutes. This discourages, but does not eliminate, the theft of the vehicle.