Question about 1992 Cadillac DeVille

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Bypassing 92 cadillac deville vats system

Ok i have a 1992 cadillac deville i have a key but vats has been changed so vin number key code is wrong the key is made right it will turn the ign no turn of motor tryed jumping starter and would turn no fire i have no access to old working key to test resistance plz help

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  • Cadillac Master
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There are ways to bypass the system, but without knowing what the correct resistance in the chip is, its not going to be easy or cheap.
There are a dozen or so different chips, each with a different resistance. The resistance completes the circuit for the VATS system sensor. You can buy a trick box to wire into the circuit, or have the computer changed to skip the VATS signal.
As long as the computer you have now does not get the signal from the VATS the injectors will not work.

Posted on Jul 18, 2013

Testimonial: "if i was to wire in a push button start would it work im pretty sure it has a bypass "

  • 6 more comments 
  • Jason Mccuan Jul 19, 2013

    if i was to wire in a push button start would it work im pretty sure it has a bypass

  • Jason Mccuan Jul 19, 2013

    *Remote start

  •  Stephen
    Stephen Jul 19, 2013

    A push button will allow the engine to crank, but like I said before, without the resistance of the chip, its not likely you can get around the computer. And a remote start would still need the chip resistance or it would have a module that would have all 12 or 15 resistors built in. Most people actually tape a good key to the inside of the column to trick the sensor. But you still need the right key chip.

  •  Stephen
    Stephen Jul 19, 2013

    If you could find a donor car with a computer and the keys you could switch them out.

  • Jason Mccuan Jul 20, 2013

    ok i went to the parts store and they have a bulldog remote start system and the first piece is a vats bypass module for the remote start is there a way to wire it in as primary ignition

  •  Stephen
    Stephen Jul 20, 2013

    I've not used a remote start as the primary - I would think you would have to use the remote every time since the bypass would be powered by the remote system. If you do some internet searching you will find bypass modules much like the one you found without the remote feature. As far as I know they can be wired into the circuit. How long they last in daily use I don't know.

  • Jason Mccuan Jul 20, 2013

    thanks is is there a way to find out my key code since it does not match the vin

  •  Stephen
    Stephen Jul 20, 2013

    I doubt the dealer would still have the equipment to scan the sensor on a model that old, but some locksmiths would have the equipment to do it. They have a device that jumpers the sensor in the cylinder with the 15 different resistors to find the right one. Or 15 blank keys one for each chip.

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