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故障现象一辆2007年产奇瑞瑞虎车,搭载SO、R481发动机和手动变速器,在某修理厂更换了正时带后,发动机故障指示灯一直点亮,且加速时发动机最高转速超不过4 000 r/min。故障诊断接车后首先验证故障,确实存在上述现象。本着先易后难的原则,连接故障检测仪对发动机控制系统进行检测,发动机电控单元内存储的故障代码为P0341——凸轮轴位置传感器信号不正确。对该车的维修经验表明,在该车的发动机控制系统控制策略中,当出现凸轮轴位置传感器失效的故障时,发动机会出现起动困难和发动机最高转速超
Symptom A 2007 Chery tiger car, equipped with SO, R481 engine and manual transmission, after the replacement of the timing belt at a garage, the engine fault indicator light is on, and the maximum speed of the engine acceleration than 4,000 r / min. Fault diagnosis After the first confirmation of the fault car, there is indeed the above phenomenon. Based on the principle of “easy first” and “hard first”, the fault detector is connected to detect the engine control system. The fault code stored in the electronic control unit of the engine is P0341 - the signal of the camshaft position sensor is incorrect. The maintenance experience of the car shows that in the control strategy of the engine control system of the car, when the failure of the camshaft position sensor fails, the engine may have difficulty in starting and the maximum speed of the engine is super