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Home >> Geo >> 1997 >> Metro Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation 1.0 & 1.3L >> Computerized Engine Controls >> Input Devices >> A/C Idle-Up Signal
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A/C Idle-Up Signal

On models with A/C, when A/C compressor is engaged, a signal is sent from A/C amplifier to PCM. PCM uses this signal with other inputs to determine engine idle speed and fuel mixture.