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Thread: truck wont start, controller in an unknown state.

  1. #1
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    Default truck wont start, controller in an unknown state.

    i was falshing my lb7, and the ethernet cord came unplugged from flashscan tool . started over, seemed to flash fine, but wouldnt start. Having read the warning that pops up, i tried flashing with 7.5, but itr says controller in an unknown state. when i try flashing w/8 it says security access denied. What to do?

  2. #2
    Lifetime Member anarchydiesel's Avatar
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    Your ECM is likely a very expensive paperweight now.

    Anarchy Diesel Tuning/ Advanced Injection Diesel Technologies
    EFI Live Cummins Beta Tester
    Duramax and Cummins Tuning
    423-506-7427

  3. #3
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    Quote Originally Posted by anarchydiesel View Post
    Your ECM is likely a very expensive paperweight now.
    Very expensive since it is a brand new ECM.

  4. #4
    Lifetime Member anarchydiesel's Avatar
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    Have you tried disconnecting the batteries to fully power down the ecm?

    Anarchy Diesel Tuning/ Advanced Injection Diesel Technologies
    EFI Live Cummins Beta Tester
    Duramax and Cummins Tuning
    423-506-7427

  5. #5
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    I pulled the ECM fuse, is that the same as? It didnt work, so I put my old ECMback in so i can drive it...the old ECM has forgotten its unlock code, and I cant pull a read or a flash off of it, but it works

  6. #6
    Lifetime Member killerbee's Avatar
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    Send the dead one to us. We can restore it if it is still viable.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

  7. #7
    EFILive Developer Site Admin Blacky's Avatar
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    Use the V8 flash option and check the two boxes:
    "Try Alt Keys" and "Assume lock is faulty"

    Regards
    Paul
    Before asking for help, please read this.

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