Truck J1939 ( 9 Pin) and J1708 (6 Pin) multi-cable to 16 Pin OBD2 Diagnostic Adapter Cable is built for heavy-duty commercial trucks. This cable will fit a lot of common heavy-duty diesel engines and is compatible with diagnostic tools such as Autocom CDP, Launch X431 Heavy Duty, XTOOL PS2 Heavy Duty. Also, the cable allows you to connect your Heavy-Duty scan tool to these diagnostic ports.