Question about 1991 Chevrolet Camaro

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91 camaro gm dealer wont or cant give me the resister code, still cant get it to start. ty john

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  • red_wing45 Jul 16, 2009

    i have no key with a chip in it.

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The VATS system has 15 possible ohmic variations in the key .One might use an ohm meter and measure the resistance in your key as this is simply a resistor producing an ohmic value which must match the resistance value the VATS module wants to see. There is a 2 wire key reader in the ignition cylinder that sends this signal to the VATS module looking for a match.One may surf the web and see ways to bypass VATS but I have never tried this and its is fairly sophisticated process which requires an accurate DVOM meter that reads OHMS

Posted on Jul 16, 2009

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Try measuring the resistance on the key

Posted on Jul 16, 2009

  • Xicano Jul 17, 2009

    thanks for elaborating on my simple post , that is correct, I have bypass the Vats and also the passlock systems for the GMs . It requires to read the resistance on the key and mimic that same resistance into the 2 wire configuration

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