Prizm L4-1600cc 1.6L DOHC VIN 5 (1989)
Manifold Air Temperature (MAT) Sensor: Description and Operation
Located in the side of air cleaner case, the Manifold Air Temperature (MAT) sensor constantly measures the temperature of the air entering the manifold
The sensor is a thermistor. As air temperature lowers, resistance increases and as it rises, resistance decreases. As air temperature of the intake varies, the
ECM, by monitoring the voltage drop, adjusts the amount of fuel injection accordingly.