Idle speed control motor vehicle idling is a component. Called the idle speed when the engine idling. Its role is: idle, according to the level of engine temperature and load size, change the idle air channel cross-sectional area of the engine under different conditions have the best idle speed. Idle speed motor is mainly used to take cars idling, and its purpose is to load based on the engine idle speed to adjust when idle. Idle stepper motor mounted on the throttle body, by the engine controller to control the engine idling, the engine speed deviation from the idle, the valve regulating flow from section to control access to the air intake manifold volume mechanical operation by the accelerator pedal steel wire rope . Throttle body with a bypass air channel, to provide air in the engine idling (when the throttle is closed.) Automatically inserted into the pivot motor idle air bypass channel, adjust the air flow through it, the engine controller according to various sensor input signals, the use of automatic idle speed motor, the pivot move out of bypass air conditioning engine idle speed channel. When the ignition key to the open position, the automatic idle speed motor to work. This switch signal input ECU, the engine is in idle perception condition. At the same time, real-time position in which the motor from the motor position sensor feedback to the ECU.
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Most car engines are now electronically controlled fuel injection type gasoline engine, idle stall for many reasons, first turn off idle to analyze the symptoms. If the engine will idle for a flame into which we call "no idle", the reasons for this failure caused the general are: engine idle speed motor or idle speed motor wire damage; brake vacuum booster leaking vacuum tube; brake thin broken vacuum booster; intake manifold leak; engine electronic control unit (ECU) in the idle speed control module problems. If the engine will stall at idle times, and then restart normally, and we call it "intermittent idle shutdown" is very difficult to investigate this failure, causing a lot of reasons, but also a variety of components or circuits not completely damaged, and more headache is due to restart after the engine stalled once they can return to normal, so even if the sensor causes the engine idle shutdown, the engine electronic control unit will think that this phenomenon is not a failure, and will not be the engine record the electronic control unit, and therefore can not be from the engine electronic control unit fault diagnosis system to obtain information about the failure. "Intermittent idle shutdown" because General are: engine idling motors are catching; idling motor cortex some frayed wires; idle air hole dirty; engine throttle position sensor problem; camshaft position sensor or crankshaft position sensor problem; engine speed sensor is defective or dirty; engine electronic control unit in the problem of idle speed control procedures, etc. Also, if the petrol quality problems can also cause this failure. Idle shutdown usually does not cause any harm, because the engine running at idle speed, often when the vehicle is in park, if the idle speed when the vehicle stalled in the taxi, the distance from the front of the obstacle, you can take the appropriate measures to avoid dangerous . Of course, if you happen to occur when you turn off the emergency brake, and that damage to large, because once the engine is off, the brake vacuum booster will not work, so that the vehicle's braking efficiency greatly reduced, and the direction of power device failure, the vehicle's steering is heavy, if coupled with your panic, it is difficult to avoid an accident.
Edit this paragraph Diagnosis
Most car engines are now electronically controlled fuel injection type gasoline engine, idle stall for many reasons, first turn off idle to analyze the symptoms. If the engine will idle for a flame into which we call "no idle", the reasons for this failure caused the general are: engine idle speed motor or idle speed motor wire damage; brake vacuum booster leaking vacuum tube; brake thin broken vacuum booster; intake manifold leak; engine electronic control unit (ECU) in the idle speed control module problems. If the engine will stall at idle times, and then restart normally, and we call it "intermittent idle shutdown" is very difficult to investigate this failure, causing a lot of reasons, but also a variety of components or circuits not completely damaged, and more headache is due to restart after the engine stalled once they can return to normal, so even if the sensor causes the engine idle shutdown, the engine electronic control unit will think that this phenomenon is not a failure, and will not be the engine record the electronic control unit, and therefore can not be from the engine electronic control unit fault diagnosis system to obtain information about the failure. "Intermittent idle shutdown" because General are: engine idling motors are catching; idling motor cortex some frayed wires; idle air hole dirty; engine throttle position sensor problem; camshaft position sensor or crankshaft position sensor problem; engine speed sensor is defective or dirty; engine electronic control unit in the problem of idle speed control procedures, etc. Also, if the petrol quality problems can also cause this failure. Idle shutdown usually does not cause any harm, because the engine running at idle speed, often when the vehicle is in park, if the idle speed when the vehicle stalled in the taxi, the distance from the front of the obstacle, you can take the appropriate measures to avoid dangerous . Of course, if you happen to occur when you turn off the emergency brake, and that damage to large, because once the engine is off, the brake vacuum booster will not work, so that the vehicle's braking efficiency greatly reduced, and the direction of power device failure, the vehicle's steering is heavy, if coupled with your panic, it is difficult to avoid an accident.