Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Infiniti FX35. 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 follows:

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 3 items check out okay, engine component parts and their installation condition are questionable. Check and eliminate the cause of the incident.
If any of the following conditions occur after the engine has started, eliminate the cause of the incident and perform IDLE AIR VOLUME LEARNING PROCEDURE again:
- Engine stalls.
- Erroneous idle.
- Fuel Pressure Check.