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.
2003 Infiniti FX45FACTORY OEM SERVICE PROCEDURE
Component Inspection
- Disconnect electric throttle control actuator harness connector. Check resistance between terminals No. 3 and 6. See Fig 1 . Resistance should be about 1-15 ohms at 77°F (25°C). If resistance is to specification, system is okay at this time. If resistance is not to specification, replace electric throttle control actuator and go to next step.
- Perform throttle valve closed position learning. See THROTTLE VALVE CLOSED POSITION LEARNING under PROGRAMMING. Perform idle air volume learning. See IDLE AIR VOLUME LEARNING under PROGRAMMING.
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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