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案例1和悦车车速表不指示,且车速达到40 km/h时门锁不会自动闭锁故障现象一辆和悦三厢车(车型为HFC7150B,搭载三菱4G15S发动机),客户反映该车车速表不指示,且当车速达到40 km/h时门锁不会自动闭锁,之前此故障只是偶尔出现,现在一直存在。故障诊断由该车车速传感器电路(图1)可知,车速传感器信号同时传递给发动机控制单元、组合仪表及车身控制单元(BCM)。连接故障检测仪,查看发动机数据流,试车
Case 1 and Wyatt car speedometer does not indicate, and the speed reaches 40 km / h when the door lock does not automatically lock the phenomenon of a Havoc sedan (model HFC7150B, equipped with Mitsubishi 4G15S engine), the customer reflects the car speedometer does not indicate , And the door lock does not automatically lock up when the speed reaches 40 km / h. This fault was only occasionally present and is always present. Fault diagnosis From the car speed sensor circuit (Figure 1) shows that the speed sensor signal is also passed to the engine control unit, instrument cluster and body control unit (BCM). Connect the fault detector, check the engine data flow, test