本文以电控发动机传感器特性发生变化导致的故障分析为例,说明当传感器输送给ECU的信号值不正确但没有超出故障自诊断系统所监控的范围时,将不会存储故障代码,修理中应根据发劫机的故障征兆进行分析判断,通过对传感器单体进行针对性检测,以找到并排除故障。 This article takes the analysis of the fault caused by the change of the characteristics of the electronically controlled engine sensor as an example to show that when the signal value sent by the sensor to the ECU is not correct but does not exceed the range monitored by the fault self-diagnosis system, the fault code will not be stored. According to the failure symptoms of the hijackers analysis and judgment, through the specific detection of the sensor monomer to find and troubleshooting.