Hi everyone, I´ve been looking all over the Web for information about "How to connect to the ECM/ECU?" "Which software do I need?" and "Which interfaces are compatible?" for engines in International Jac City Star trucks. The engines are:

Cummins ISF 2.8L 4 Cyl. Euro IV EGR (Class 3 trucks)
Cummins ISF 3.8L 4 Cyl. Euro IV EGR (Class 4 trucks)
Cummins ISF 3.8L 4 Cyl. Euro IV SCR (Class 5 trucks)
Cummins ISD 4.5L 4 Cyl. Euro IV SCR (Class 6 trucks)

One thing I know is that they work on a Electrical Scheme of 24 volts, so I'm really not sure about connecting my scanner(AFAIK it works over 12v) to the truck. That's why I'm asking you guys. Any information related to this trucks will be appreciated.

Thanks in advance.