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故障现象一辆2008年产奥迪TF车。搭载BWA发动机和02E变速器,累计行驶里程约为7万km。据驾驶人反映,该车在行驶途中颠簸了一下,接着轮胎压力报警灯常亮。故障诊断该车采用间接测量轮胎压力的轮胎压力监测系统(TPMS),轮胎中没有安装轮胎压力传感器,压力不足的轮胎周长会变小,在行驶中其旋转圈数与其他的轮胎不同。该车TPMS控制单元(J793)通过舒适系统总线接收ESP控制单元(J104)传送来的4个轮速传感器的速度信
Trouble phenomenon A 2008 Audi TF car. Equipped with BWA engine and 02E transmission, the cumulative mileage of about 70,000 km. According to the driver reflected, the car bump in the road a bit, then the tire pressure alarm light is always on. Troubleshooting The car uses a tire pressure monitoring system (TPMS) that indirectly measures the tire pressure without a tire pressure sensor installed. The under-stressed tire becomes smaller in circumference and different in number of turns when driving. The car TPMS control unit (J793) through the comfort of the bus system to receive ESP control unit (J104) sent from the four wheel speed sensor speed letter