Hi! I am trying to write a tune in MSD81 ECU. I have successfully done backup and PFlash read, but I can not write. When i try to write I get error message "Cannot perform checksum. Make sure your modified file is valid. -Ref:3104-
It is impossible to write the file that i just read from the ecu also.
I have donor ecus that i tested on with the same result. I can read Pflash, but I can not write back to the ecu.
All help is appreciated.
Thanks in advance
George