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VARIABLE INTAKE AIR CONTROL OPERATION [LF, L3]

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• The PCM energizes the variable intake-air solenoid valve when the engine speed is less than 4,500 rpm, opening the variable intake-air shutter valve to enhance the inertia charging effect at the low engine speed range.
• The PCM blocks energization to the variable intake-air solenoid valve when the engine speed is 4,500 rpm or more, closing the variable intake shutter valve to enhance the inertia charging effect at the high engine speed range.