浅析汽车CAN-BUS的故障诊断  

Brief Analysis to Fault Diagnosis of Automobile CAN-Bus

作　　者：孙保海 Sun Baohai(Yuncheng polytechnic college,Shanxi Yuncheng 044000)

机构地区：[1]运城职业技术学院,山西运城044000

出　　处：《汽车实用技术》2020年第8期147-148,169,共3页Automobile Applied Technology

摘　　要：CAN总线(CAN-Bus)以其可靠性、实时性及灵活性的特点,在汽车ECU(Electrical Control Unit)通信中占据越来越重要的角色。Can-Bus实现车内互联系统由传统的点对点互联向总线式系统的进化,在很大程度上降低了车内电子系统布线的复杂度。然而在降低布线复杂度的同时,也给检测带来了一定的困难。总线上传递信号,而检测信号的仪器首选示波器。但汽车用示波器价格昂贵、使用的理论基础比较高。对此,文章针对CAN总线的检测提出使用万用表的方式进行检测,为CAN-Bus的检测提供快速、方便的检测方法。Can bus,with its characteristics of reliability,real-time and flexibility,plays an increasingly important role in the communication of automobile ECU(electrical control unit).Can bus realizes the evolution of interior interconnection system from traditional point-to-point interconnection to bus system,which greatly reduces the complexity of interior electronic system wiring.However,while reducing the complexity of wiring,it also brings some difficulties to the detection.The signal is transmitted on the bus,and the oscilloscope is the preferred instrument for detecting the signal.But the auto oscilloscope is expensive and has a high theoretical basis.To this end,this paper puts forward the method of using multimeter to detect can bus,which provides a fast and convenient detection method for CAN bus detection.

关 键 词：CAN-BUS 检测 电平信号 故障诊断 

分 类 号：U472.42[机械工程—车辆工程]