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How to Bypass your VATS

This is a discussion on How to Bypass your VATS within the General Help forums, part of the LSx Technical Help Section category; Originally Posted by Andy-rdz77 do you know if an aftermarket alarm system with a remote start will over ride the ...

  1. #41
    lmpounded SandmanWs7's Avatar
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    Quote Originally Posted by Andy-rdz77 View Post
    do you know if an aftermarket alarm system with a remote start will over ride the factory VATS? My car won't start and now the alarm goes off when i try to start it and the security light stays on. even with they key in the ignition the alarm won't stop. just runs itself for about 90 seconds or so.
    The alarm by itself will not. But you can have the installer bypass it for you, but all he is gonna do is what is writen in this post and charge you 70-80 bucks to do it. best thing is to do it yourself.

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    Smile Security Light

    Thanks for the advice, save me plenty of money. I got the Cermet Potentiometer at Radio shack $2.69, you can adjust it to the ohms you need. Car is starting just fine light is off.

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    yeah i went ahead and replaced the ignition cylinder. My ass is still sore! thanks for the info though

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    lmpounded SandmanWs7's Avatar
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    Quote Originally Posted by Andy-rdz77 View Post
    yeah i went ahead and replaced the ignition cylinder. My ass is still sore! thanks for the info though
    Stealership

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    I have 6.1 at 400k
    6.063 at 40k
    so do I need the value for pelet 12?

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    yes

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    Hello
    I read on my key at 20 K : 3.02 or 3.01
    what resistor do i need ?
    Do I need a white key (without the resistor) ?
    This afternoon I located the wires end I disconnected the harness. On the back I try to put thru the purple/white a resistor with a value of 2997 ohms, but nothing works...is it my key ? my resistor ? so, must I reconnect the harness ???
    Thanks to answer
    All the best

    Pat

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    lmpounded SandmanWs7's Avatar
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    Looks like you have the #9.

    This chart is for any GM product, Buick, Cadillac, Oldsombile, Chevrolet, and Pontiac that has a VATS key (single or double-sided.)

    VATS # (K)OHMS (Set your meter to the 20k ohm setting)

    1———— 0.402
    2———— 0.523
    3———— 0.681
    4————-0.887
    5————-1.130
    6————-1.470
    7————-1.870
    8————-2.370
    9————-3.010
    10————3.740
    11————4.750
    12————6.040
    13————7.500
    14————9.530
    15————11.801

  9. #49
    lmpounded SandmanWs7's Avatar
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    TRy to get something as close to it as possible. Looks like your just under it.

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    lmpounded SandmanWs7's Avatar
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    Use Color

    Orange, White, Red, Black RES390 - 392 Green, Red, Orange Black RES510 CN 523 Blue, Gray Brown, Black RES680 FW 681 Gray, Gray, Violet, Black RES910 GP 887 Brown, Brown, Orange, Brown RES1.1K KA 1130 Brown, Yellow, Violet, Brown RES1.5K N5 1470 Brown, Gray, Violet, Brown RES1.8K UN 1870 Red, Orange, Violet, Brown RES2.4K XB 2370 Orange, Black, Brown, Brown RES3.0K GA 3010 Orange, Violet, Yellow, Brown RES3.6K NP 3740 Yellow, Violet, Green, Brown RES4.7K FY 4750 Blue, Black, Yellow, Brown RES6.2K C5 6040 Violet, Green, Black, Brown RES7.5K XY 7500 White, Green, Orange, Brown RES10K KB 9530 Brown, Brown, Gray, Red RES12K UW 11800

    The bold is the one you need I believe
    Last edited by SandmanWs7; 09-19-2008 at 12:22 PM.

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    Thanks to answer. I Try to do it, but do I need a new key without the chip/resistor to start ?
    Best

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    Quote Originally Posted by Patys View Post
    Thanks to answer. I Try to do it, but do I need a new key without the chip/resistor to start ?
    Best
    No. I did the bypass and used the same key till I got it fixed. If the bypass with the correct resistor does not work then the key is not the problem. It means it could be your key cyliner (Where you stick the key in to start) Which can be pretty expensive to fix at a dealership.

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    Quote Originally Posted by SandmanWs7 View Post
    No. I did the bypass and used the same key till I got it fixed. If the bypass with the correct resistor does not work then the key is not the problem. It means it could be your key cyliner (Where you stick the key in to start) Which can be pretty expensive to fix at a dealership.
    actually by doing this mod you're bypassing the key and cylinder.

    Do you have gold band or silver band resistors? Gold has 5% and silver has 10% variance. Also, was your security light on? Just making sure you had a vats issue to begin with. Are you putting more than one resistor on and if so are they in parrellel or in series? If more than one is used they need to be in a series.

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    I putting two resistor in series :
    the colors of the resistors are : gold red green brown
    for one resistor the value is 1500 ohms.

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    that should work then. You're putting those across the purple and white wires on the module side of the plug?

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    Yes ! I don't understand...

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    maybe it's the key cylinder...

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    Quote Originally Posted by Patys View Post
    maybe it's the key cylinder...
    the cylinder is being bypassed if you're putting it on the module side of those wires.

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    by doing this mod you are bypassing the key cylinder and the module right?
    I've done it on my car already just wanted to make sure I'm right.

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    Quote Originally Posted by LS1buckey View Post
    by doing this mod you are bypassing the key cylinder and the module right?
    I've done it on my car already just wanted to make sure I'm right.
    no, you're just bypassing the key and cylinder. Look at it this way. When you insert the key into the ignition the resistor pellet in the key contacts 2 small wires in the cylinder which sends the ohm resistance to the vats module which then says pass or fail to the pcm. By putting those resistors inline you're basically telling the module that it passes all the time.

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