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Home >> Lexus >> 1994 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Miscellaneous Controls >> A/C System >> A/C Idle-Up System

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A/C Idle-Up System

When A/C compressor clutch engages, the ECM increases engine idle speed using the Idle Air Control (IAC) valve.

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