VARIABLE AIR DUCT (VAD) SHUTTER VALVE OPERATION [L3]
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• Normally, the rod is pushed by the force of the spring, opening the shutter valve. When intake manifold vacuum is applied to the diaphragm chamber, the rod is pulled, closing the valve.
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1
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Shutter valve open
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2
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Shutter valve close
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3
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Actuator
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4
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Valve
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5
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Rod
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6
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Intake manifold vacuum
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