Detection Condition
WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors Mass Airflow/Intake Air Temperature (MAF/IAT) sensor input voltage at PCM terminal No. 39. If voltage is less than .2 volt, DTC is set. This is a continuous monitor. MIL is illuminated if PCM detects malfunction during first drive cycle.