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Home >> Pontiac >> 1991 >> LeMans Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Park/Neutral (P/N) Switch
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Park/Neutral (P/N) Switch

P/N switch, mounted on transmission gear selector, controls a circuit to ECM to indicate when transmission is in Park or Neutral. The ECM uses this signal to adjust idle speed (IACV function) and control Torque Converter Clutch (TCC) operation.

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