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) Check
Turn ignition off. Unplug electrical connector at TPS on throttle body. Note terminal identification. Insert specified thickness feeler gauge between throttle stop screw and throttle lever. See TPS RESISTANCE SPECIFICATIONS table. Using an ohmmeter, check for resistance or continuity. Replace or adjust TPS if not within specification.
| Model/ Application | Clearance In. (mm) | Terminal Identification | Ohmmeter Reading |
|---|---|---|---|
| 4WD 4A-FE | .024 (.60) | IDL-E2 | Continuity |
| " | " | PSW-E2 | No Continuity |
| " | " | IDL-PSW | No Continuity |
| " | .032 (.80) | IDL-E2 | No Continuity |
| " | " | PSW-E2 | No Continuity |
| " | " | IDL-PSW | No Continuity |
| " | Fully Open | IDL-E2 | No Continuity |
| " | " | PSW-E2 | Continuity |
| " | " | IDL-PSW | No Continuity |
| 2WD 4A-GE | 0 (0) | VTA & E2 | 200-800 |
| " | .014 (.36) | IDL & E2 | 2300 or Less |
| " | .023 (.58) | IDL & E2 | Infinity |
| " | Fully Open | VTA & E2 | 3300-10,000 |
| " | " | VCC & E2 | 3000-7000 |
Use the Manual With the Right Hardware
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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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