故障现象一辆2003年款奥迪A6 2.8 L轿车,累计行驶里程约为30万km,出现严重亏电的故障。故障诊断到达现场后发现该车蓄电池已没有一点电了,用帮电的方法将发动机起动着机后检查,没有发现有用电器异常打开的现象,且蓄电池的充电电压为14 V,也正常。用万用表测试静态放电电流,为30 mA,也正常,于是便更换了蓄电池,并嘱咐驾驶人晚上一定要注意不要忘了关闭灯光 Fault phenomenon A 2003 Audi A6 2.8 L sedan, the cumulative mileage of about 300000 km, a serious loss of power failure. Fault diagnosis arrived at the scene and found that the car battery has no electricity, with the help of the method of starting the engine after the machine check, did not find useful abnormal open phenomenon, and the battery charge voltage of 14 V, is also normal. Test static discharge current with a multimeter, 30 mA, also normal, so they replaced the battery, and asked the driver must pay attention at night Do not forget to turn off the lights