Mass Air Flow Sensor
(MAFS) is a hot-film type sensor and is located in between the air cleaner
and the throttle body. It consists of a tube, a sensor assembly and honey
cell and detects intake air quantity flowing into the intake manifold.
While the intake air coming out of the air cleaner flows by the honey
cell, it becomes laminar flow, and then it passes the hot-film. At this
time, heat transfer is generated by convection and this sensor loses its
energy. This sensor detects the mass air flow by using the energy loss and
transfers the information to the PCM by frequency. The PCM calculates fuel
quantity and ignition timing.
