Airflow Meter
WARNING: This page is about a different car, the 1994 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
Airflow meter measures intake airflow volume. Airflow meter delivers intake air input signal by means of a variable resistor (potentiometer).
Input signal is sent to Engine Control Module (ECM) for controlling fuel injection system operation and ignition timing (spark advance). Airflow meter also contains a switch which is used for controlling fuel pump operation.