then I'll explain what I know' , if you read the whole of you reads the file, 2.5 mb ( and there is like 1 hour to read it) if you ( like I do) you do it in the bdm you put nothing in the laws from 2 mb and you have all the bck of the ecu and then tranquilo ,I usually open are not units mangy ,but I know the file is 2 mb you don't read from serial port