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故障现象一辆2012年5月生产的卡罗拉(型号为ZRE151L-GEPNKC),仅行驶了约20km,出现车速在30km/h左右轻踩制动踏板时轿车前部发出“咔、咔、咔”异响声的现象。故障诊断询问客户得知,该车为刚购买的新车,提车后在市区道路正常行驶了20 km多后,车速在30 km/h轻踩制动踏板时轿车前部有“咔、咔、咔”的连续异响,仪表盘没有故障灯点亮,客户担心轿车的安全问题而回公司检查。和客户一起试车,当以20 km/h～50 km/h的车速行驶轻踩制动踏板时,轿车前部确实会发出“咔、咔、咔”的响声,且声音较大,经多次试车,发
Fault phenomenon Carolla produced in May 2012 (model ZRE151L-GEPNKC), only driving about 20km, appeared at a speed of 30km / h or so light on the brake pedal when the front of the car issued a “click, click, click ”Abnormal sound phenomenon. Fault diagnosis Ask the customer to know that the car just bought a new car, pick up the car in the urban road normal driving more than 20 km at 30 km / h light brake pedal when the front of the car with “ Carbazole, carbazole ”continuous abnormal sound, dashboard lights did not malfunction, the customer worried about the safety of the car back to the company inspection. When the vehicle is traveling at a speed of 20 km / h ~ 50 km / h and the brake pedal is depressed lightly, the front of the car does emit a sound of “click, click, click,” and the sound is louder. Test several times, hair