Intake Air Temperature Sensor: Operation
WARNING: This page is about a different car, the 2006 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.
The Negative Temperature Coefficient (NTC) resister located within the intake air temperature sensor alters it's resistance in line with the charge air temperature. If the engine is cold, the value equals ambient temperature. For a temperature of 68°F (20°C) the resistance is approximately 6000 ohms. For a temperature of 104°F (40°C) the resistance is approximately 3300 ohms. See Figure.