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.
1992 Mercury Tracer Base, 4D Wagon, AutomaticFACTORY OEM SERVICE PROCEDURE
Circuit Test TP - Throttle Position Sensor
NOTE:
To diagnose throttle position on 1.8L M/T, go to CIRCUIT TEST STG. Enter this test only when a Code 12 is displayed during self-test procedures (KOEO or KOER), or when directed here from another CIRCUIT TEST. To prevent replacement of good components, check the following non-EEC components for fault: idle speed or throttle stop adjustments, throttle shaft or linkage, and cruise control linkage.
Factory Service Tools
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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.
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