Mitsubishi Montero P0102 Mass Airflow Sensor Circuit

CIRCUIT OPERATION • The volume airflow sensor power is supplied from the MFI relay (terminal No. 1), and the ground is provided on the PCM (terminal No. 88). • 5-volt power is applied to the volume airflow sensor output terminal (terminal No. 3) from the PCM (terminal No. 63). The volume airflow sensor generates a pulse signal when the output terminal and ground are opened/closed (opened/short). . TECHNICAL DESCRIPTION • While the engine is running, the volume airflow sensor outputs a pulse signal which corresponds to the volume of air flow. • The PCM checks whether the frequency of this signal output by the volume airflow sensor while the engine is running is at or above the set value.