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 Highlander Limited, FWDFACTORY OEM SERVICE PROCEDURE
Service Data: 2AZ-FE
Identifying Emission Control Service Data Table (2AZ-FE)
| A/F sensor(bank 1 sensor 1) resistance | at 20°C(68°F) | 0.8 to 1.4 Ω |
| at 800°C(1,472°F) | 1.8 to 3.2 Ω | |
| Oxygen sensor (bank 1 sensor 2) resistance | at 20°C(68°F) | 11 to 16 Ω |
| at 800°C(1,472°F) | 23 to 32 Ω | |
| VSV for EVAP resistance | at 20°C (68°F) | 26 to 30 Ω |
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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