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VIN:LSVCD6A40C××××××。行驶里程:32625km。车型:配置1.8T CEA发动机。故障现象:仪表EPC故障报警且加油无力,如图1所示。读取故障码如图2所示,传感器参考电压A断路。故障诊断:根据故障码分析这个是发动机传感器的5V供电电压存在问题,究竟哪个传感器是5V供电。首先根据这款车发动机控制单元的针脚定义图来确定有几个传感器5V供电:
VIN: LSVCD6A40C ××××××. Mileage: 32625km. Model: 1.8T CEA engine configuration. Symptom: Instrument EPC fault alarm and fueling, as shown in Figure 1. Read the fault code shown in Figure 2, the sensor reference voltage A open circuit. Fault diagnosis: According to the fault code analysis of this is the engine sensor 5V supply voltage problems, which sensor is 5V power supply. First of all, based on the pin definition of the engine control unit of the car to determine the number of sensors 5V power supply: