Diagun is a great import tool, but HAS MANY CAN BUS ISSUES! FORD-GM-CHRYSLER CAN BUS the diagun is selective in which ones it will connect too. Example: 2007 Saturn Relay. Lets you into all modules but Powertrain. 2007 Ford F150 WILL not connect to CAN bus. 2008 Dodge Ram 2500 Cummins Diesel. SLOOOOOOW to connect and only 50% time will connect to CAN. Have tried 3 different Launch Scan tools (GDS-DIAGUN-MASTER) and they wont support USA CAN BUS in certain vehicles. Few issues with cars under year 2000 also. Scan tool is not 100% but about 60% coverage of cars. DIAGUN III hopfully will be different software and hardware to fix CAN bus issues.
