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Home >> Geo >> 1995 >> Prizm Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System/Component Tests - 1.6L >> Idle Control System >> A/C Idle-Up Circuit Check (Equipped With A/C)
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A/C Idle-Up Circuit Check (Equipped With A/C)

A/C amplifier sends an idle-up signal to ECM/PCM when A/C compressor clutch is in operation. ECM/PCM uses this information to adjust mixture and engine idle speed.

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