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.
1994 Toyota Corolla Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor
- Disconnect electrical connector from Throttle Position Sensor (TPS). Loosen TPS mounting screws. Connect ohmmeter between terminals IDL and E2. See Fig 1.
- Apply vacuum to throttle opener (if equipped). To set initial clearance, insert proper thickness feeler gauge between throttle stop screw and throttle lever. See appropriate THROTTLE POSITION SENSOR ADJUSTMENT table.
- With ohmmeter showing no continuity, rotate TPS clockwise until continuity exists. Tighten TPS mounting screws. Using specified feeler gauge, recheck adjusted clearance. Disconnect ohmmeter. Install electrical connector on TPS.
THROTTLE POSITION SENSOR ADJUSTMENT
| Application/ Model | Initial Clearance In. (mm) | Adjusted Clearance In. (mm) | Ohmmeter Reading | ||
|---|---|---|---|---|---|
| Corolla (1) | .028 (.71) | .016 (.41) | Continuity | ||
| " | " | .035 (.89) | No Continuity | ||
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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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