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 Infiniti FX45FACTORY OEM SERVICE PROCEDURE
Diagnostic Procedure
- Check Electric Throttle Control Actuator Visually
- Turn ignition switch OFF.
- Remove the intake air duct.
- Check if foreign matter is caught between the throttle valve and the housing.
OK or NG
- OK: go to 2.
- NG: Remove the foreign matter and clean the electric throttle control actuator inside. See Figure .
- Replace Electric Throttle Control Actuator
- Replace the electric throttle control actuator.
- Perform THROTTLE VALVE CLOSED POSITION LEARNING .
- Perform IDLE AIR VOLUME LEARNING
.
- Inspection end
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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