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Home >> Saturn >> 2001 >> SW2 Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Control System - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Park/Neutral Position Switch
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Park/Neutral Position Switch

NOTE: Park/Neutral Position (PNP) switch may also be referred to as Transmission Range (TR) switch. TR and PNP and back-up switches are all combined in one assembly.

The Park/Neutral Position (PNP) switch is connected to transmission gear selector. PNP switch signals PCM when transmission is in Park, Neutral or Drive. Information from PNP switch is used by PCM for determining control of IAC valve, TCC and EGR. To check PNP switch, perform functional check of switch. See appropriate SYSTEM & COMPONENT TESTING article. If vehicle is driven with PNP switch disconnected, idle quality will be affected and a possible false related diagnostic trouble code may be set.

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