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电控汽车的故障检测仪(俗称解码器)除了具有对电控汽车故障自诊断系统的读码与消码功能外,还具有动态测试功能(数据流功能)。故障自诊断系统检测的动态数据流能自动显示,给电控汽车的故障诊断带来很大的帮助。但是,目前很多维修人员对数据流功能不太了解,也未能充分利用下面结合实例对电控汽车故障自诊断系统及数据流功能进行简要分析。1 故障代码与数据流功能电控汽车正常运行时,E-CU的输入、输出信号电压值都有一定的变化范围。当某一电路信号电压值超出了规定的范围或送出ECU不能识别的信号,并且这一现象在一段时间内不会消失,ECU便判断
In addition to reading and decoding functions of the electronic control car fault self-diagnosis system, the fault detector (commonly known as a decoder) of an electronically controlled vehicle also has a dynamic test function (data flow function). Fault self-diagnostic system detects the dynamic data flow can be automatically displayed to the electronic control of the vehicle fault diagnosis has brought great help. However, at present, many maintenance personnel do not know much about the data flow function, nor can they make full use of the following examples to conduct a brief analysis of the fault diagnosis system and the data flow function of the electrically controlled vehicle. 1 Fault Code and Data Flow Function When the electronic control car is in normal operation, the input and output voltage values of the E-CU have a certain range of change. When a circuit signal voltage value exceeds the specified range or send out the ECU can not identify the signal, and this phenomenon will not disappear in a period of time, ECU will judge