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|What is a checksum.||A checksum is a block of digital data that is used to verify the contents is of the memory is correct. Upon modifying the data the correct checksum must be calculated to ensure proper operation of the Engine Control Unit (ECU).|
|What happens if I checksum a file that was already checksummed.||It will not cause a problem if a file is checksummed twice. In most cases this will result in zero changes as the checksum is already made for the file. Although in a very small number of instances the MPPS Checksum may be slightly different than a checksum calculated using a differnt method. In This case it will also be ok to checksum the file a second time.|