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Home >> Nissan-Datsun >> 1988 >> Sentra Base >> Repair and Diagnosis >> Engine Performance >> System >> ECC CEC System >> Operation >> Engine Controls >> Idle Air Adjusting (IAA) Unit
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Idle Air Adjusting (IAA) Unit

The idle air adjusting unit is a combination of the Auxiliary Air Control (AAC) valve, Fast Idle Control Device (FICD), Vacuum Control Valve (VCV) and incorporates an idle speed adjusting screw. It receives its voltage signals from the ECU to control the idle speed at predetermined amounts depending on existing operating conditions.

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