Development of Diagnostic Communication Module on KWP 2000

KWP2000 protocol is widely used in the field of automotive vehicles.The paper describes the principle of KWP2000 protocol.The paper presents an instruction to the development of communication module based on the KWP2000 protocol in common rail system.With the help of a diagnostic tool,testing communication can be finished with the tool and realized based on KWP2000 protocol.The communication module is low cost and in high reliability,and will lay a solid foundation for the industrialization of electronically controlled system.