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.
Throttle Position Sensor (TPS)
Measure total and variable resistance between specified TPS connector terminals. See TPS TEST TERMINALS table. Total resistance should be 3500-6500 ohms. Variable resistance should change smoothly between 3500 and 6500 ohms as throttle valve is moved from closed to wide open throttle.
| Application | Terminals No. | |
|---|---|---|
| Total Resistance | ||
| Eclipse 1.8L | 1 & 2 | |
| Eclipse 2.0L | 2 & 3 | |
| All Others | 1 & 4 | |
| Variable Resistance | ||
| Colt Vista, Expo, Montero, Pickup 3.0L, Precis, Ram-50 3.0L & Summit Wagon | 1 & 3 | |
| Eclipse 1.8L | 2 & 3 | |
| Eclipse 2.0L | 3 & 4 | |
| All Others | 2 & 4 | |
| Application | (2) Continuity | ||||
|---|---|---|---|---|---|
| All Models | 4 Changes Per Revolution | ||||
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| Application | (2) Volts | |||||
|---|---|---|---|---|---|---|
| All Models | ||||||
| Ignition Switch Off | 1 Or Less | |||||
| Ignition Switch On | 4.5-4.9 | |||||
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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.