Rodeo LS 4WD V6-3.2L (1998)
Mass Air Flow Sensor: Description and Operation
DESCRIPTION AND OPERATION
The mass air flow (MAF) sensor measures the difference between the volume and the quantity of air that enters the engine.
"Volume" means the size of the space to be filled. "Quantity" means the number of air molecules that will fit into the space. This information is
important to the Powertrain Control Module (PCM) because heavier, denser air will hold more fuel than lighter, thinner air.
The PCM adjusts the air/fuel ratio as needed depending on the MAF value. The scan tool reads the MAF value and displays it in terms of grams
per second (gm/s). At idle, the scan tool should read between 4-7 gm/s on a fully warmed up engine. Values should change quickly on
acceleration. Values should remain stable at any given RPM. A failure in the MAF sensor or circuit will set DTC P0101, DTC P0102, or DTC
P0103.
