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故障现象一辆2012年产上海大众新帕萨特车,搭载型号为CED的1.8TSI发动机和7速双离合DSG变速器,行驶里程约为5.3万km。因日问行车灯、驻车灯和牌照灯常亮而进厂检修。故障诊断接车后,试车验证故障,接通点火开关,车辆的日间行车灯、驻车灯和牌照灯均已点亮,但此时并未接通前照灯开关。连接VAS6150A调取故障代码,无故障代码存储。用VAS6150B调取BCM的数据流,前照灯开关处于关闭状态时的相关数据如图1所示;将前照灯开关置于AUTO位置
Symptom A 2012 Shanghai Volkswagen new Passat car, equipped with a CED 1.8TSI engine and a 7-speed dual clutch DSG transmission, the mileage of about 53000 km. Due to the traffic lights on the day, the lights and license plate lights often lit into the plant overhaul. Fault diagnosis After the car, the test to verify the fault, turn on the ignition switch, the vehicle’s daytime running lights, parking lights and license plate lights have been lit, but not connected to the headlight switch. Connect the VAS6150A to retrieve the error code, no problem code is stored. With VAS6150B transfer BCM data stream, the headlight switch is turned off when the relevant data shown in Figure 1; the headlight switch AUTO position