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故障现象一辆行驶里程约为2.7万km的大众CC2.0T轿车,客户反映车辆在锁车一段时间后防盗报警装置会突然报警,且双闪灯(危险警告灯)闪烁。故障诊断根据客户所反映的故障现象,先用故障检测仪检测车辆所有的控制单元,无报错现象;重点检查车辆舒适系统控制单元(J393)、防盗报警装置(H12,图1)的供电,正常,都在13.2 V,搭铁也正常;检查与J393的LIN线连接,正常,且在锁车10 min后,端子T3r/1的电压为12 V。上述
Trouble phenomenon A mileage of about 27000 km of the public CC2.0T sedan, the customer reflects the vehicle lock after a period of time the burglar alarm will suddenly alarm, and double flashing lights (hazard warning lights) flashing. Fault diagnosis According to the fault phenomenon reflected by the customer, first use the fault detector to detect all the control units of the vehicle without any error; check the power supply of the vehicle comfort system control unit (J393) and the burglar alarm device (H12, Figure 1) , Are at 13.2 V, the ground is also normal; check the connection with the J393 LIN line, normal, and lock the car 10 min, the terminal T3r / 1 voltage is 12 V. Above