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.
1999 Lexus SC 400FACTORY OEM SERVICE PROCEDURE
Throttle Position (TP) Sensor
TP SENSOR RESISTANCE SPECIFICATIONS
| Application | Terminals | Ohms @ 68°F (20°C) | |||||
|---|---|---|---|---|---|---|---|
| ES300 & RX300 (1) | |||||||
| Throttle Fully Closed | VTA & E2 | 200-6300 | |||||
| Throttle Fully Open | VTA & E2 | 2000-10,200 | |||||
| VC & E2 | 2500-5900 | ||||||
| GS300 & SC300 | VC & E2 | (2) 1200-3200 | |||||
| GS400, LS400, LX470 & SC400 | VC & E2 | (2) 1250-2350 | |||||
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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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