故障现象一辆车型为GRS190L的雷克萨斯GS300轿车,行驶里程为11.2万km。当行驶到10.8万km时,因制动盘起槽严重,磨损超限,更换了制动盘、制动摩擦块。但使用一段时间后,发现车辆正常行驶轻踩制动踏板或点制动时出现尖叫声,虽经多次维修,仍无法彻底解决此故障。 Symptom A model for the GRS190L Lexus GS300 sedan, mileage of 112,000 km. When driving to 108,000 km, due to severe brake disc from the groove, wear overrun, replaced the brake disc, brake pad. However, after using it for a period of time, it was found that the normal running of the vehicle could cause a screaming sound when the brake pedal was depressed or the brake was braked. After several repairs, the fault could not be completely solved.