大多数电控汽车发动机管理系统都配有一套故障自诊断系统,只要发动机投入运转,其自诊断系统便对电控系统的各类传感器和执行器进行周期性的巡视,一旦发现有不正常的信号,位于驾驶室仪表板上的发动机故障指示灯(CHECK)便会发亮,向驾驶员发出故障信号,同时将测出来的故障存人电脑(ECU)的存储器中,驾驶或维修人员通过一定的操作程序使发动机的自诊断系统将内存的故障以代码的形式显示出来,通过查找故障码表,可以有 Most electronic control car engine management system is equipped with a set of fault diagnosis system, as long as the engine is put into operation, its self-diagnostic system on the various types of electronic control system sensors and actuators for periodic inspection, once found to have abnormal Signal, the CHECK LED on the dashboard of the driver’s cab will illuminate and send a signal of fault to the driver. At the same time, the detected fault will be stored in the memory of the ECU, and the driving or maintenance personnel will pass certain The operating procedures so that the engine’s self-diagnosis system will memory fault code displayed in the form, through the search fault table, you can have