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Thread: $06FF Checksum Failure

  1. #1
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    Default $06FF Checksum Failure

    I have a client
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  2. #2
    Forum tyhee Site Admin GMPX's Avatar
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    It is an easy fix, have a look at the calibration in the picture below. Change the value to 65535, re-save the file (either one) and you should be ok to flash it.

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  3. #3
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    Resolved! Thank you for the quick response.

    Incase I run into this again, I assume the same numeric string (65535) can be used with other controllers as well as the E92? Is this bypassing the checksum test or correcting the altered data from the 3rd party flash?

  4. #4
    Forum tyhee Site Admin GMPX's Avatar
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    There is a couple of companies that store CVN correction data after the 'end of calibrations' marker, when we flash the ECM before finalising it we check what was written is correct against the checksums. Unfortunately with those correction bytes outside of the checksum area it appears the flash failed.
    Not every controller has the problem and not every one has the correction calibration, but if you strike it again then yes '65535' is the value that is needed, the description explains it.

    Cheers,
    Ross
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  5. #5
    Lifetime Member Mitco39's Avatar
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    Thats awesome that you guys made it possible for us to fix this ourselves.

  6. #6
    Forum tyhee Site Admin GMPX's Avatar
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    Yeah I do need to define the calibration (well the location) for every OS but most of the common stuff is done.
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  7. #7
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    I have this problem again with an E38 ECM. I have looked for the Checksum Fail Fix but it appears it has not been implemented with this controller yet. Any quick fixes or do I need to start cutting and pasting all the tables to a unmolested calibration?

  8. #8
    Forum tyhee Site Admin GMPX's Avatar
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    It should be in just about all E38's, what operating system is your file?
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  9. #9
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    Op Sys 12653674
    I looked in the Operating System Patches directory and it didn't have the Chechsum Fail Fix. I didn't bat an eye at the error since I was sure I would be able to patch the checksum.

  10. #10
    Forum tyhee Site Admin GMPX's Avatar
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    Ok, try this updated .calz which has the option to reset the checksum issue some of these tuners cause.
    Save the attached file in to here:
    C:\Program Files (x86)\EFILive\V7.5\Calibrations\E38

    Then reopen your ctz file and you should see parameter B9999
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