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Thread: MDS not turning off

  1. #1
    Tuner in Training
    Join Date
    May 2017
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    21

    MDS not turning off

    I go to disable the mds system in the tune but when I go to scan it its saying its active=yes.
    Is the vcm editor have a bug in it right now?

  2. #2
    Advanced Tuner
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    Mar 2018
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    Illinois
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    Are you running beta VCM, if so uninstall VCM and reinstall the lastest non-beta version. Rather than selecting disable, I prefer to keep the switch enabled but instead max out the minimums to 127mph so MDS does not kick on.

  3. #3
    Tuner in Training
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    May 2017
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    I've tried the beta and the non beta. The jeep has and after market cam in it and I deleted the mds.

  4. #4
    Senior Tuner
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    May 2015
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    1,908
    Aside from the PID reporting "yes" any other symptoms its doing any harm? Might just be a fluke based on removing the solenoids, if i recall correctly the default mode is ON, so any short or reason the system cant work properly (like removing harness) the ECU is in MDS mode. I could be wrong.

  5. #5
    Advanced Tuner
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    Illinois
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    Quote Originally Posted by zack723 View Post
    I go to disable the mds system in the tune but when I go to scan it its saying its active=yes.
    Is the vcm editor have a bug in it right now?
    So I just checked my manual challenger which does not come equipped with MDS and the PID shows it is active. Could just be an HP tuners/PCM thing, kind of like how on my JGC all VVT switches show disabled but you can see VVT is working by monitoring the cam angle.

  6. #6
    Tuner in Training
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    May 2017
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    Ok I'll check that out

  7. #7
    Tuner
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    Nov 2015
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    St. Louis MO
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    The flag definitely stays active all the time in the scanner. Seen it on every single one ive done MDS delete on.