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故障现象一辆东风日产新天籁轿车(采用25LVQ25DE发动机和CVT变速器,配备智能钥匙和一键按钮起动系统),行驶了大约14万km,用户反映该车在行驶过程中,发动机故障指示灯突然点亮,此时将加速踏板踩到底,发动机转速也只能达到2500r/min左右。故障诊断经过了解得知,该车已进厂维修多次,且已经更换过加速踏板位置传感器和发动机ECU。该车进厂检查时,发动机故障指示灯点亮,用CONSULT-3进入发动机电控系统,读得故障代码为P2122——加速踏板位置传感器1电路低输入,故障代码的检测条件为加速踏板
Symptoms A Nissan new Teana sedan (with 25LVQ25DE engine and CVT transmission, equipped with a smart key and a key button to start the system), traveling about 140,000 km, the user reflects the car during driving, the engine fault light suddenly point Light, this time will accelerate the pedal in the end, the engine speed can only reach about 2500r / min. After understanding that the fault diagnosis, the car has been repaired into the factory several times, and has replaced the accelerator pedal position sensor and engine ECU. The car into the factory inspection, the engine fault indicator light, with CONSULT-3 into the engine electronic control system, read the fault code P2122 - accelerator pedal position sensor 1 circuit low input, the fault code detection conditions for the accelerator pedal