The input signal is automatically controlled to drive the idle air to screw the motor. If the idle speed is called, the air leakage may be caused in a certain part below. If the intake manifold is leaking, the vacuum is leaking at the 1st station. The increased intake manifold pressure, at this time, the elbow provides more fuel, the idle speed increases, higher than the specified value.
Use digital universal to test switches and sensors such as idle contacts. The idle contact switch is also called a raised switch, also called a throttle position switch. Diagnostic methods for idle contact switches vary depending on the year and model of the car, and are usually followed by the procedures recommended in the service manual. It should be noted that the 12 voltage must never be connected to the terminals of the idle speed switch of the idle air control motor. When these contacts are closed, these contacts will be burnt.
Checking the difference between the electric and the specified position of each sensor, higher or lower than the specified value will result in the wrong judgment of 1 and the idle speed is abnormal. Not only that, but the failure of many input sensors will also cause other faults in engine operation.
The failed input switch also causes the idle speed to be small. Most of the input sensors provide a high voltage potential signal when they are turned on, and provide a low voltage signal when they are closed. If the idle air control motor fails or becomes stuck, Then the total speed is fixed at all temperatures. The idler air control motor has a hexagonal stud at the end of the plunger. This stud is not sufficient for idle adjustment. Adjusting the stud will not affect the idle speed. Because 纟1 will follow the idling correction, and as the stud rotates, the motor plunger will change accordingly, and the engine will start, and the throttle valve may be in an unsuitable position. At a fixed temperature; it is difficult to see. Chrysler products fall into this category. For such products, the idle speed can be obtained by turning off the ignition switch and disconnecting the joint of the idle air control motor so that the plunger is fully extended. The hexagonal studs of the motor are adjusted only if the hex studs are not properly adjusted or a new motor is installed.
Source and ground connectors to diagnose if it is a ground or power failure.
It is the possible cause of the malfunction. Before adding a replacement, 1 must be diagnosed as a fault object. Scanning tester diagnostics or exchange method can be used according to the maintenance manual. Idle speed gas control motor fault diagnosis car and accessories 2000
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