The Tactrix works on many modern diesels via the OBD2 CAN bus, but you need the correct software (e.g., PCMFlash or ECUFlash with paid definitions). For a standard Mitsubishi Triton (MN/MQ), yes—you can read and flash the diesel ECU. For Ford Rangers, you are better off with a dedicated Ford tool.
For the uninitiated, the Tactrix OpenPort 2.0 is not just another OBD2 scanner. It is the gold standard for for Japanese performance cars. tactrix openport 2.0 australia