Inlet Air Temperature Sensor
WARNING: This page is about a different car, the 2003 Dodge Grand Caravan, 2003 Dodge Caravan, 2003 Chrysler Voyager, and 2003 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
The IAT Sensor is a Negative Temperature Coefficient (NTC) Sensor that provides information to the Powertrain Control Module (PCM) regarding the temperature of the air entering the intake manifold. The Intake Air Temperature (IAT) sensor value is used by the PCM to determine air density. The PCM uses this information to calculate, Injector pulse width, Adjustment of ignition timing, to prevent spark knock at high intake air temperatures.
Inlet Air Temperature (IAT) sensor delivers input signal to PCM to indicate temperature of incoming intake air. PCM uses input signal for controlling fuel injector pulse width and spark advance. Inlet air temperature sensor is mounted to inlet air ducting. See Fig 1 and Fig 2 .