Diagnostic Procedure

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2004 Nissan Xterra, 2004 Nissan Titan, 2004 Nissan Sentra, 2004 Nissan Quest, and 2004 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

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.