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  1. #1
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    Default Sid 306 eeprom crc calculation

    Hi, please help with eeprom crc calculation after mileage mod in dump. Never had a issue with bosch ecus but siemens seems that my tools don't support. Attached org and mod, thanks!
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    Last edited by levisdj; 12th February, 2024 at 03:44 PM.

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    what mileage is needed, I'll try to change it in the original

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    199018 is shown onto the odometer
    Had read with Xtool 448924, 448906 and 357490

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    pass pm...............
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    levisdj (12th February, 2024)

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    Original = 448906 km ?
    Mod = 199.018 km ?
    Algoritm = CRC-16/X-25 in VIN block


    55553148534441434E3435373031323131B9F2 CRC-16/X-25 in swap bit
    Last edited by eliet2000; 13th February, 2024 at 07:53 PM.
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    levisdj (12th February, 2024)

  8. #6
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    fww1, thanks for your effort, but it seems that your mod wiped out the whole eeprom.

    @eliet2000 would you be nice enough to give an example ? the values are good, but it's the other way around

  9. #7
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    I'm sorry, I did a few tests with the example above, but there's a no go. Can someone help calculate the crc in eep v2 please? Thanks

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    what is the error when writing the mod?when editing eeprom control does not change

  11. #9
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    Car starts and runs rough with alot of smoke! 100% crc error as I had a few megane in the past with sid307... so need correct crc calculation

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    when editing eeprom CRC does not change

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    try to record the original eeprom, see how the car behaves

  14. #12
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    As stated, normal no smoke, runs as its supposed to....

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    I can manually calculate the checksums in the eeprom dump if this is still relevant.

  16. #14
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    Yes friend, still need!

  17. #15
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    Your corrected file, regards.
    Attached Files Attached Files
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