Intake Air Sensor

The intake air sensor (temperature sensor I) provides the ECU with voltage signals. The intensity of these signals, depends upon intake air volume and air temperature. The incoming air moves the stator flap against the force of the return spring. See Figure.

As more air is drawn in, stator flap opens even more. This rotary motion of the stator flap actuates a special potentiometer (both are physically connected together) and thus varies the strength of the signal sent to the electronic control unit.

Connected to the stator flap is a dampening flap which prevents rapid oscillations of the stator flap. One of the contacts on the potentiometer operates the fuel pump as the stator flap is opened by air flow. This sensor is an integral part of the potentiometer and its operation modifies signal sent to the ECU.