Mass Air Flow Sensor
WARNING: This page is about a different car, the 2002 Ford Escape, 2001 Mazda Tribute, and 2001 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The Mass Air Flow (MAF) sensor directly measures the mass of the air flowing into the engine. The sensor output is a DC (analog) signal ranging from about 0.5 volt to 5.0 volts by the PCM to calculate the injector pulse width for stoichiometry. The MAF sensor input is used for EPC pressure control, shift and Torque Converter Clutch (TCC) control.