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Home >> Lexus >> 1995 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Miscellaneous Controls >> A/C System >> A/C Idle-Up System

A/C Idle-Up System

When A/C compressor clutch engages, ECM energizes the A/C Vacuum Switching Valve (VSV), which increases amount of by-pass air. This increases engine idle speed.

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