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.
2004 Toyota Sienna CEFACTORY OEM SERVICE PROCEDURE
Service Data
Emission Control Service Data
| VSV for canister closed valve | ||
| Resistance | at 20°C (68°F) | 25 to 30 Ω |
| at 100°C (212°F) | 32 to 42 Ω | |
| VSV for EVAP | ||
| Resistance | at 20°C (68°F) | 26 to 30 Ω |
| Air fuel ratio sensor | ||
| Resistance | 1 (TH) - 2 (+B) | 0.8 - 1.4 Ω at 20°C (68°F) |
| 1 (TH) - 2 (+B) | 1.8 - 3.2 Ω at 800°C (1,472°F) | |
| 1 (HT) - 4 (E1) | No continuity | |
| Heated oxygen sensor (Bank 1 oxygen sensor No. 2) | ||
| Resistance | 1 (HT) - 2 (+B) | 11 to 16 Ω at 20°C (68°F) |
| 1 (HT) - 4 (E1) | No continuity | |
| Heated oxygen sensor (Bank 2 oxygen sensor No. 2) | ||
| Resistance | 1 (HT) - 2 (+B) | 11 to 16 Ω at 20°C (68°F) |
| 1 (HT) - 4 (E1) | No continuity |
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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