Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1992S10/T10 P/U 4WD V6-173 2.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTRANSMISSION POSITION SENSOR/SWITCHDESCRIPTION AND OPERATION
1992 Chevrolet S10/T10 P/U 4WD V6-173 2.8L
Transmission Position Sensor/Switch: Description and Operation
1992 Chevrolet S10/T10 P/U 4WD V6-173 2.8LSECTION Description and Operation
Park/Neutral Switch:
PNPS - PARK/NEUTRAL POSITION SWITCH:
PURPOSE
The PARK/NEUTRAL POSITION (PNP) switch indicates to the ECM when the transmission is in PARK or NEUTRAL.
This information is used by the ECM to control:
- Idle Air Control (IAC) valve operation
- Transmission Torque Converter Clutch (TCC) operation
OPERATION
The PNP switch contacts are closed to ground in park or neutral and open in drive ranges and reverse. The ECM supplies ignition voltage through a current limiting resistor to the switch and senses a closed circuit when voltage drops to less than 1 volt.
NOTE
Do NOT drive the vehicle with the PNP switch disconnected, since idle quality may be affected.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.