故障现象一辆奥迪A6L车,配备3.0TFSI发动机,累计行驶里程为52km,车主反映该车的发动机故障灯常亮(图1)。故障检测接车后首先试车,确认故障现象属实。除了发动机故障指示灯常亮外,没有发现其他异常。连接VAS5052读取发动机控制单元内的故障代码,调得的故障代码如图2所示。接着根据读取的故障代码提示,对凸轮轴位置传感器和曲轴位置传感器及其相关电路进行检查。 Fault phenomenon An Audi A6L car, equipped with 3.0TFSI engine, the cumulative mileage of 52km, the owner reflects the car’s engine fault light is always on (Figure 1). Fault detection After the first test car, confirm the fault phenomenon is true. Except that the engine fault indicator is steady, no other abnormalities were found. Connect the VAS5052 to read the fault code in the engine control unit, and set the fault code shown in Figure 2. Then according to read the fault code prompts, camshaft position sensor and crankshaft position sensor and its related circuits to be checked.