故障现象一辆2 015年产东风日产轩逸车,累计行驶里程约为3万km,驾驶人反应该车行驶过程中发动机故障灯异常点亮,发动机加速无力,无法正常行驶,缓行到店。故障诊断接车后试车,确认故障现象属实。利用故障检测仪对车辆进行检查,读取的故障代码如图1所示。试着清除故障代码,均可以清除,但是试车发现,故障现象仍然存在。根据故障代码的含义及检测条件(表1),用故障检测仪的监测功能检查加速踏板位置传感器1和2的输出信号 Fault phenomenon A 2015 Nissan Xuan Yi Dongfeng Nissan, the cumulative mileage of about 30,000 km, the driver reaction of the car during the engine light abnormalities lit, the engine acceleration weakness, unable to travel normally, slow to the store. Troubleshooting After the car to test, confirm the failure is true. The use of fault detection device for vehicle inspection, read the fault code shown in Figure 1. Try to clear the fault code, can be cleared, but the test found that the fault still exists. According to the meaning of the fault code and the test conditions (Table 1), check the output signals of accelerator pedal position sensors 1 and 2 with the fault detector’s monitoring function