WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Troubleshooting Item Description Chart
Courtesy of MAZDA MOTORS CORP.
Fig 2: Diagnostic Procedure Chart - Airflow Mode Does Not Change (Steps 1-5)
Courtesy of MAZDA MOTORS CORP.
Fig 3: Diagnostic Procedure Chart - Airflow Mode Does Not Change (Step 6)