Fault diagnosis method of idling speed controller for air supply of car engine

摘要

The present invention relates to a method of diagnosing an idling speed controller for supplying air to an automobile engine, and more particularly, to a method of diagnosing a failure of an idling speed controller for an air supply of an automobile engine by detecting the position of the rotary slide valve (3) And a sensor 6 capable of detecting the position of the rotary sled valve 3 in the static state and the duty value of the air are the same as the normal value, It is possible to easily determine whether or not the idle speed controller 2 is malfunctioning by diagnosing whether the duty value of the rotating drum 3 and the air is the same as the normal value.