MAF Sensor

Scan tool range 0.0-512 gm/s. Mass air flow (MAF) is the MAF Input frequency converted to grams of air per second. This indicates the amount of air entering the engine.

Scan tool range 0 to 32000 Hz. The mass air flow sensor input signal to the PCM is a frequency which varies from around 3000 Hz at idle to above 7000 Hz at wide-open throttle. The PCM convents this frequency signal to grams per second to be displayed on the scan tool as MAF.