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Home >> Saab >> 1989 >> 9000 CD, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Theory/Operation >> Computerized Engine Controls >> Input Devices >> A/C Switch
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A/C Switch

When A/C switch is on, ECU receives voltage signal to energize A/C relay. A/C relay has a momentary delay to allow ECU to signal Automatic Idle Control (AIC) valve to increase idle speed to compensate for increased load.