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Post Info TOPIC: Honda ECU Checksum Calculation


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Honda ECU Checksum Calculation


Can anyone that knows how the Honda ECU checksum is calculated, please share this info? Thanks in advance!



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https://github.com/RyanHope/HondaECU



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Status: Offline
Posts: 4
Date:

Looks like the checksum for the ecu bin is the same checksum used in the k-line communications:

((sum(bytearray(data)) ^ 0xFF) + 1) & 0xFF

where for the ecu you sum over all bytes except the checksum byte which is 8 bytes from the end of the file



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https://github.com/RyanHope/HondaECU

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