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Many blog reader get into trouble on car ECU cannot work well,after they performing mileage modified,immo off,DTC off,ECU chip tuning and write new data back to ECU.Error prompted ECU communication failure,waring light ON….Why?
Here chinaobd2.com give reason,because your ECU programmer without data checksum function cause the problem.
A checksum is like a unique fingerprint of a file that can be used to verify whether two files are identical. Each time you run a checksum, a number string is created for each file. Even if one byte of data has been altered or corrupted, that string will change.
So it is necessary for you to use ECU programmer read/write with data checksum functions,only in this way the ECU EEPROM and FLASH data can be written to ECU correctly.
What ECU programmer with checksum function?
KTAG,Kess V2,Dimsport,CMDFlash,X17 Flex,PCMflash,Autotuner,Bitbox (Both original or clone work)
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