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.
Park/Neutral Position (PNP) Switch
With ignition switch in OFF position, set DVOM to 200-ohm scale. Locate PNP switch (on transmission) and CPP switch (on clutch pedal linkage). Disconnect harness at switch. Measure resistance across PNP terminals with transmission in Neutral and across CPP terminals with clutch pedal fully depressed. If any resistance is greater than 5 ohms, switch is open. Replace switch as necessary. Faults in switches or switch circuits should set a service code. See QUICK TEST in TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section. If no service code has been set, see CIRCUIT TEST TA in TESTS W/CODES - EEC-IV article for additional switch testing and specifications.
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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.