Air Flow Meter/Sensor: Description and Operation

OPERATION
^ The volume air flow sensor converts the engine intake 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 Multi-port Fuel Injection (MFI) relay to the volume air flow sensor and is grounded by the engine control module. The volume air flow sensor generates a pulse signal as it repeatedly connects and disconnects between the 5V voltage supplied from the engine control module and ground.