基于J1939协议的车辆故障诊断与ECU报文解析

Automobile Failure Diagnosis and Analysis Trouble Code from ECU Based on J1939 Protocol

在对汽车的故障诊断过程中,基于SAE J1939协议的CAN通信的ECU提供的发动机性能检测参数和整车网络通信数据,实现整车网络中多个ECU数据的共享;J1939协议同时也支持故障的诊断,通过数据转换模块将接收的数据转换成串行数据(包含CAN的ID地址),诊断工具(手持终端)可以读取当前故障码DM1或清除当前故障码DM11。本文提出了一种车辆故障诊断的研究策略,同时提出了一种基于JAVA语言的报文的解析方法,能够有效实时地实现对汽车发动机的故障检测。

In the process of vehicle fault diagnosis,the CAN communication ECU based on SAE J1939protocol can provide engine performance detection parameters and vehicle network communication data to realize the sharing of multiple ECU data in vehicle network.The J1939protocol also supports faulty diagnosis.The data is converted into the serial data(including the CAN ID address)through the data conversion module.The diagnostic tool(handheld terminal)can read the current fault code DM1or clear the current fault code DM11.In this paper,a research method of vehicle diagnosis is proposed.At the same time,an analytical method based on JAVA language is proposed,which can effectively detect the fault of automobile engine in real time.