Air Flow Meter/Sensor: Description and Operation

OPERATION
- The volume air flow sensor located in the air cleaner converts the engine intake air volume into a pulse signal of frequency proportional to the air volume and inputs it to the engine control module, which then computes the fuel injection rate, etc. based on the input signal.
- The volume air flow sensor power is supplied from the MFI relay to the volume air flow sensor and is grounded in the engine control module. The volume air flow sensor generates a pulse signal as it repeatedly opens and closes between the 5 V voltage supplied from the engine control module and ground.