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 MANUALSNISSAN-DATSUN2004ALTIMA S, AUTOMATICREPAIR AND DIAGNOSISGENERAL INFORMATIONCOMPUTER RELEARN PROCEDURESINTRODUCTIONIDLE AIR VOLUME LEARNINGDIAGNOSTIC PROCEDURE
2004 Nissan-Datsun Altima S, Automatic
Diagnostic Procedure
2004 Nissan-Datsun Altima S, AutomaticSECTION Diagnostic Procedure
If idle air volume learning cannot be performed successfully, proceed as listed:
- Check that throttle valve is fully closed.
- Check PCV valve operation.
- Check that downstream of throttle valve is free from air leakage.
- When the above three items check out OK, engine component parts and their installation condition are questionable. Check and eliminate the cause of the incident.
- If any of the listed conditions occur after the engine has started, eliminate the cause of the incident and perform idle air volume learning all over again:
- Engine stalls.
- Erroneous idle.
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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.