故障现象一辆雷克萨斯NX200车,搭载3ZR-FAE发动机,累计行驶里程约为1万km。车主反应,该车行驶中会忽然自动制动,车速明显下降。故障诊断由于故障发生时没有任何征兆,有时一整天都不会出现,有时候行驶一段路会出现三四次,为了便于诊断,车主特意用手机对故障发生时的情景进行了录像。观看录像得知,车辆以60 km/h的车速行驶,突然自动制动,车速明显降低,组合仪表提示“同时踩着加速踏板和制动踏板”(图1),且主警告灯闪烁,而此时车主并未踩制 Fault phenomenon A Lexus NX200 car, equipped with 3ZR-FAE engine, the cumulative mileage of about 10,000 km. Owners reaction, the car will suddenly automatic braking, the speed dropped significantly. Fault diagnosis As the failure occurred without any symptoms, sometimes a day will not appear, and sometimes driving a section of the road there will be three or four times, in order to facilitate the diagnosis, the owner deliberately phone the scene of the incident occurred when the video was recorded. Watch the video to learn that the vehicle was traveling at 60 km / h with a sudden automatic brake and significantly reduced vehicle speed. The combination indicator prompts “both the accelerator pedal and the brake pedal” (Figure 1), and the main warning light flashes , But this time the owner did not step on the system