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Home >> Infiniti >> 2001 >> I30 Base, RE4F04W >> 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 Pressure (PSP) switch is attached to power steering high pressure line. PSP switch monitors power steering load and sends signal to the ECM. When oil pressure exceeds a predetermined amount, ECM sends a signal to Idle Air Control (IAC) valve to increase idle speed.