Abstract: This paper introduces method of getting fault dataflow in ECU from serial communication port, automobile standard serial communication protocol ISO9141、OBDII，and how to get and display information of dataflow in programming ways，which is good for research of fault diagnosis of automobile on protocol layer.

摘要： 介绍如何通过串行通信口获取汽车电脑ECU中故障信息数据流、美国汽车标准串行通信协议ISO9141、汽车故障码检测标准OBDII，以及如何应用程序方式采集数据信息，有助于从协议层次上对汽车故障信息的研究。

关键词: 串行通信, 数据流, OBDII标准, ISO9141协议标准, 故障检测

CLC Number: 

• TP274