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故障现象一辆型号为FV7160FG(采用BJT发动机)捷达轿车,累计行驶里程约为16.7万km,在行驶中突然出现加速时发动机无响应的故障现象。故障诊断承修该车后,首先根据故障现象进行了基本检查。试车发现,接通点火开关电子风扇就工作;起动发动机,发动机故障灯常亮,发动机怠速工作正常,踩下加速踏板发动机确实无响应。接着连接故障检测仪进行检查,共调得3个故障代码,分别为:P1172——节流阀驱动角度传感器2(G188)信号低;P0118—冷却液温度传感器(G62)输入电压高;P0340——凸轮轴位置传感器A信号不良。读取发动机系统数据流,发现冷却液温度为-40.5℃,不正常,未发现
Fault phenomenon A model FV7160FG (with BJT engine) Jetta sedan, the cumulative mileage of about 167000 km, suddenly appeared in the driving acceleration of the engine without response failure phenomenon. After the diagnosis of the car repair the fault, based on the phenomenon of the first basic inspection. Test found that the ignition switch on the electronic fan to work; start the engine, the engine fault light is always on, the engine idle speed is working properly, depressing the accelerator pedal engine does not respond. Then connected to the fault detector for inspection, a total of three fault codes were adjusted, namely: P1172 - throttle drive angle sensor 2 (G188) signal is low; P0118 - coolant temperature sensor (G62) input voltage is high; P0340- - Defective camshaft position sensor A signal. Engine system data flow was read and the coolant temperature was found to be -40.5 ° C, not normal, not found