KT200/KTM200 has been confirmed no problem reading and writing Fiat Marelli MJ8DF ECUs.
KT200 MARELLI MJD 8F, 8S, 8DS – FIAT, Suzuki [Diesel] pinout
Solder the rainbow flat cable on the pcb
To read and write use the following driver:
User test feedback:
To clone ecu best read bench mode
read the whole backup
You can also read MJ8 DF with kess v2 (2,097,152 bytes, size on disk) and write with galletto v54 (because make cs ok). Some failed with kess. Need luck. KT200 do it 100%.