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故障现象一辆2010款奇瑞开瑞优优乘用车,发动机型号为SQR472WC,排量为1.0 L,行驶里程约为7万km。据驾驶人反映,该车早上还可以正常使用,停了一段时间后发动机就无法起动了,并且类似故障在2个月前发生过,当时清洗节气门后就恢复正常了。故障诊断用故障检测仪进行检测,显示系统电压过低。考虑到该车经常拉货,维护又不及时,总体车况很差,外观也很脏,随即对电源系统的熔丝、继电器、蓄电池接线及搭铁线等进行了简单检查和处理。处理完后再用故障检测仪进
Fault phenomenon A 2010 Chery Karayan Youyou passenger car, the engine model SQR472WC, displacement 1.0L, mileage of about 70,000 km. According to the driver reflected that the car can be used normally in the morning, stopped for some time after the engine can not be started, and similar failures occurred in 2 months ago, when the throttle was cleaned after the resumption of normal. Fault detection Detected by the fault detector, showing the system voltage is too low. Taking into account the car often pull goods, maintenance is not timely, the overall poor condition, the appearance is also very dirty, then the power system fuse, relays, battery wiring and ground wire were a simple inspection and treatment. Processed and then use the fault detector into