Ambient Temperature Sensor
WARNING: This page is about a different car, the 1998 Dodge Intrepid and 1998 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
Ambient temperature sensor is located inside right front bumper beam, near power steering cooler. This thermistor monitors outside air temperature. BCM uses ambient temperature to adjust blower speed, temperature offsets, evaporator temperatures and mode control. If sensor fails, battery temperature input is used as back-up.