Airflow Meter
WARNING: This page is about a different car, the 1995 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
Airflow meter measures intake airflow volume. Airflow meter converts intake air readings into a voltage signal by means of the air swirl frequency.
Input signal is sent to Engine Control Module (ECM) for controlling fuel injection system operation and ignition timing (spark advance).