Air Vane Meter Assembly Operation - 1.9L & 2.3L Turbo

Air vane meter assembly contains 2 sensors, vane airflow (VAF) meter and vane air temperature (VAT) sensor. VAT measures temperature of incoming air.

VAF measures volume of air entering engine. Airflow moves vane which is mounted on pivot pin. Vane is connected to variable resistor (potentiometer). Output of potentiometer, which is connected to 5-volt reference signal from ECA, varies with volume of air flowing though meter.

Intake air volume and temperature inputs are used by ECA to compute fuel flow necessary for optimum air/fuel ratio.