故障现象一辆年产别克君越车,搭载发动机,累计行驶里程约为10万km,据客户反映,发动机怠速运转时,接通空调开关,一段时间后,仪表盘上发动机冷却液温度超出正常值,同时发动机故障灯点亮。故障排除接车后试车验证故障现象,仪表盘上发动机故障灯常亮,冷却液温度明显偏高,立即将发动机熄火。连接故障检测仪,读取故障代码,发动机控制单元内存 Fault phenomenon An annual output of Buick over the car, equipped with the engine, the cumulative mileage of about 100,000 km, according to the customer, the engine idle speed, turn on the air conditioning switch, after a period of time, the instrument panel coolant temperature exceeds the normal , While the engine fault light is lit. Troubleshooting Car after the test to verify the phenomenon of failure, the dashboard light on the engine fault light, the coolant temperature was significantly higher, immediately the engine flameout. Connect the fault detector, read the fault code, engine control unit memory