Outside Air Temperature

The body control module (BCM) reads the outside air temperature sensor. The temperature sensor is a 2-wire negative temperature co-efficient thermistor. The BCM provides 5 volts to an internal input resistor that is connected to the outside air temperature sensor. The outside air temperature is displayed in the driver information center (DIC) and the DIC is located in the radio. The temperature information is transmitted by the BCM for display in the DIC via GMLAN serial data message. The BCM provides the outside air temperature information in Celsius. The radio converts the temperature to Fahrenheit, if required.