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Home >> Saab >> 1991 >> 900 SPG >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> A/C Switch

A/C Switch

When A/C switch is on, it sends a signal to the fuel injection ECU. The ECU sends a signal to the Automatic Idle Control (AIC) valve to increase idle speed to compensate for increased load.

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