IAC SOLENOID VALVE CONSTRUCTION/OPERATION [AJ (3.0L Duratec)]
BUE011320661N04
Construction
• Installed near the throttle body installation area of the intake manifold.
• Consists of the housing, plunger, and coil.
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1
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IAC valve
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2
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Throttle body
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Operation
• Air that bypasses the throttle valve passes from the air hose upstream of the throttle valve, through the IAC solenoid valve and is suctioned towards the intake manifold downstream of the throttle valve.
• The plunger moves according to a duty signal from the PCM and the size of the bypass passage opening varies accordingly.
• The amount of air that bypasses the throttle valve varies according to the size of the bypass opening; the larger the opening, the more air that is bypassed.
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1
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Not energized
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2
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Coil
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3
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Plunger
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4
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Housing
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5
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From air hose
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6
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To intake manifold
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7
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Atmospheric air flow
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8
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Energized
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9
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Valve
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