VATS problem
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Cadillac Seville / Cadillac Eldorado Forum Discussion, VATS problem in Past Cadillac Vehicle Discussion; Ok I just bought a 92 seville. Needed to replace the column so I swapped my ignition lock cylinder over ...
  1. #1
    milwaukee is offline Cadillac Owners Member
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    VATS problem

    Ok I just bought a 92 seville. Needed to replace the column so I swapped my ignition lock cylinder over with the wire to the new column. Put the column back in and doesn't crank but started fine before I swapped columns. So I tested key resistance and I got .883 k ohms then I tested 32 way wiring harness which was giving me .883 k ohms. So I'm asking why doesn't it start? If battery voltage is too low will it cause vats to act weird? Or could it be that the theft deterrent module is bad? Plz help me guys. Thanks.

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: VATS problem

    1. Low battery voltage can wake up the electrical gremlins and cause all sorts of electrical problems.

    2. Pull the DTC's. Post them AND their definitions.

  4. #3
    milwaukee is offline Cadillac Owners Member
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    The IPC is telling me "switch problem " battery is not an issue I know for sure it is the VATS system. My electrical tests are telling me everything is fine. Does the bcm need to relearn the key value? Also does anyone know where the bcm is located or if there is a way to bypass the whole vats system. (The resistor pack method will not work in this case)

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: VATS problem

    I believe the BCM is behind the glove box or in that general vicinity. I don't recall it needing to relearn the key value. It should never be changed. The resistor method is the only way to bypass it that I know of.

  6. #5
    milwaukee is offline Cadillac Owners Member
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    Ok so know the security light turns off with key on. I got a prnd123 switch failure and a eeprom code. Just to let you know I swapped out IPC before this stuff happened. The car will not start so I think I have the column mounted switch in the wrong position? Can you help me out?

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: VATS problem

    The column mounted (starter) switch is simply a slide switch connected from the key tumbler to the switch via a linkage rod. That has nothing to do with VATS. Is that disconnected? If that was disconnected you'd have nothing, no crank, no ignition, no lights, nothing.

  8. #7
    milwaukee is offline Cadillac Owners Member
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    Ok so the starter switch on the column. If it is in the wrong position it won't start? Would you happen to know what position is the right one? It looks like there is four possible positions.

  9. #8
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    It doesn't have a "correct" position. It moves when you turn the key. The 4 positions corrospond to key positions. Accessory, off, run, and start.

  10. #9
    milwaukee is offline Cadillac Owners Member
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    Ok I'm getting power to accessories with key in run but the starter won't turn over. The IPC has code I 027 which is the park neutral position switch. How do I check to see if it is working correctly? Also could the starter relay be bad?

  11. #10
    rodnok01's Avatar
    rodnok01 is offline Cadillac Owners Connoisseur
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    If the car doesn't know it's in park/neutral it will not start so I would say that error with neutral safe switch is prob your issue, wirig or switch anyways

  12. #11
    milwaukee is offline Cadillac Owners Member
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    Yes I know I was wondering do you know the procedure to test it?

  13. #12
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    Re: VATS problem

    Wiggle the shifter while trying to start the car or run it through the gears while trying to start. Just be sure to have you foot planted firmly on the brake just in case.

  14. #13
    milwaukee is offline Cadillac Owners Member
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    Ok I will try that . If I jump the yellow and purple wire from the park neutral position switch the starter should engage correct?

  15. #14
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    Re: VATS problem


  16. #15
    milwaukee is offline Cadillac Owners Member
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    Ok I finally got it the ignition switch was in wrong position so when the rod moved the car thought it was in run and not in start. Thanks for the help guys

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