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Home >> Infiniti >> 2000 >> QX4 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Power Steering Oil Pressure Switch
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Power Steering Oil Pressure Switch

Power steering oil pressure switch is attached to power steering high pressure line. Switch monitors power steering load and sends signal to ECM. When oil pressure exceeds a predetermined amount, ECM sends a voltage signal to idle speed control valve to increase idle speed.

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