Diagnostic Procedure
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.