一辆右置方向盘的丰田卡利娜(CARINA)轿车,装备4S—EU单点喷射发动机,该车怠速运转时转速上下波动,忽高忽低。维修时先检查点火线路及供油系统,解体清洗节气门体,但故障依然存在。在发动机运转中拆掉节气门位置传感器插头,转速趋于平稳,因此判断故障出在节气门位置传感器。检查时发现该车使用开关型节 A Toyota Corolla car with a right-hand steering wheel, equipped with a 4S-EU single-jet engine, fluctuates in speed from low to high when idling. First check the ignition circuit and fuel supply system maintenance, disassembly cleaning throttle body, but the fault still exists. Remove the throttle position sensor plug in engine operation, the speed tends to be stable, so to determine the fault in the throttle position sensor. Check that the car used switch type section