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.
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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 20 (ENGINE CONTROL SYSTEM & COMPONENT TESTING - 4-CYLINDER)IDLE CONTROL SYSTEMSTHROTTLE BODYTACOMA
2004 Toyota Celica GT, Standard
Throttle Body: Tacoma
2004 Toyota Celica GT, StandardSECTION Tacoma
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tacoma, 2002 Toyota RAV4, 2002 Toyota Prius, 2002 Toyota MR2, and 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
- Check that throttle linkage moves freely at throttle body. To check vacuum supply at throttle body, start engine and allow engine to idle. Note vacuum port location on throttle body. See Fig 1.
- Check that vacuum and no vacuum exist at specified vacuum ports on throttle body with engine idling and with engine at more than idle. See THROTTLE BODY VACUUM SUPPLY table. Repair or replace components if vacuum supply is not as designated.
THROTTLE BODY VACUUM SUPPLY
| Vacuum Port | Engine Idling | Engine At More Than Idle | ||
|---|---|---|---|---|
| E | No Vacuum | (1) Vacuum | ||
| P | Vacuum | (1) Vacuum | ||
| R | No Vacuum | (1) Vacuum | ||
|
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RENDER: 1.0x
NO RELATED
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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.