VARIABLE INTAKE AIR SOLENOID VALVE CONSTRUCTION/OPERATION [LF, L3]
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Construction
• Mainly composed of the solenoid coil, spring, and plunger.
Operation
Energized
• The solenoid coil magnetizes, pulling the plunger. The passage between A and B ports opens due to the plunger being pulled, and intake manifold vacuum is applied to the actuator.
De-energized
• The intake manifold vacuum passage is blocked, and the passage between ports B and C opens, depressurizing the actuator.
LF
L3
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1
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Energized
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2
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De-energized
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3
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Port A (to intake manifold)
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4
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Port B (to actuator)
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5
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Coil
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6
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Plunger
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7
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Spring
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8
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Port C (to atmosphere)
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