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Home >> Lexus >> 2003 >> ES 300 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> A/C Switch
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A/C Switch

When A/C is turned on, input signal is delivered to Engine Control Module (ECM). ECM uses input signal to control engine idle speed during A/C operation.

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