Design of interface between ECU simulator and fault diagnosis device based on J2534 protocol
                                                                      HUANG Liquan, ZHAO Zhiguo
                                            (School of Automotive Studies, Tongji University, Shanghai 201804, China)

Abstract: Aiming at the problem of low development efficiency of diagnostic engineers due to the complex composition of the platform in the development field of diagnostic content of diagnostic tool in automobile aftermarket, the composition of the development platform, the design of the ECU simulator and the implementation of the specified API in J2534 protocol were researched. The idea of simplifying the platform into one computer, applying J2534 protocol into the communication between diagnostic software and ECU simulator and implementing offline diagnosis simulation were proposed. ECU simulator and the communication interface of diagnostic tool were developed, communication between ECU simulator and the diagnostic tool named DiagAnalyzer was completed by the specified API in J2534 protocol. The dualprocess model was adapted to communicate with diagnostic tool by this simulator. The results indicate that this design scheme is feasible and convenient, diagnostic engineer could develop the diagnostic content for specified type of vehicle quickly after writing special diagnostic data into data configuration file, finally, it also could match and communicate with other diagnostic softwares complied with the J2534 interface protocol.

Key words: J2534 protocol; ECU simulator; ISO15765; RPC communication; diagnostic tool