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Mass Airflow (MAF) Sensor

MAF is a hot-film type airflow sensor, and is mounted within the intake duct between the air cleaner and throttle body. Mass airflow rate is measured by detection of heat transfer from a hot film probe.

Mass airflow sensor generates a pulse so it repeatedly opens and closes between the 5-volt pulses supplied from the ECM. This results in the change of the temperature of the hot-film probe and in the resistance. The ECM uses this signal to determine basic fuel injection duration.

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