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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 4 CYL & V6 >> Computerized Engine Controls >> Input Devices >> A/C Switch

A/C Switch

Informs ECM when A/C system is on. ECM responds by increasing idle speed to improve idling and reduce emissions. During heavy engine load, ECM will also open A/C clutch relay to disengage A/C clutch.