I am trying to clone a stock ecu onto an identical ecu (label and serial) for testing the mmcflash.
I used MH8304F to read and the read look ok.
I was able to flash it to the spare ecu but when I can not get it to work on the car. I didnt do any checksum correction since i am 100% sure that the stock is fine.
Maybe the file is more than 512kb?
I read both ecu and compare them in hex and the 2 reads are identical