故障现象:一辆雷克萨斯IS250,行驶里程为6万多千米,客户反映后挡风玻璃无法正常加热,在冬天后挡风玻璃有雾气的时候无法去除,因为车辆马上要过保修期,所以到店检查。故障诊断:首先确认故障,打开后挡加热开关,等待一段时间后,用手去摸后挡风玻璃,发现还是常温,没有任何的变化。正常情况下,打开后挡风玻璃加热开关后,触摸玻璃会有明显 Symptom: A Lexus IS250, mileage of more than 60,000 kilometers, the customer reflects the windshield can not be normal heating, in the winter when the windshield can not be removed when the fog, because the vehicle to be over warranty, so to Shop inspection. Troubleshooting: First confirm the fault, turn on the heat switch, wait for a period of time, touch the rear windshield by hand and found that it is still room temperature, there is no change. Under normal circumstances, open the rear windshield heating switch, touch the glass there will be obvious