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Home >> GMC >> 1991 >> Forward Control 6.2 J, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls (Gasoline) >> Input Devices >> Power Steering (P/S) Switch (2.5L)
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Power Steering (P/S) Switch (2.5L)

This switch informs ECM of engine load conditions which exist when steering wheel is turned from center to full lock position. ECM uses this information to help control idle speed. To check function of P/S switch, perform functional check of switch. See the article SYSTEM/COMPONENT TESTS in this section.