Air Flow Meter/Sensor: Description and Operation

The vane air flow (VAF) meter detects the intake air quantity and converts the measurement to a voltage signal (reading) by a potentiometer. The voltage signal is sent to the ECA, which in turn determines injection quantities based on this signal. Voltage increases as the opening angle of the measuring plate increases or decreases as the opening angle becomes smaller. The meter also incorporates a sensor to detect intake air temperature and a fuel pump switch to control the fuel pump.