Diagnosis And Testing - Ambient Temperature Sensor: Notes
The outside temperature display function is supported by the ambient temperature sensor, a wiring circuit, the Controller Area Network (CAN) data bus and the Body Control Module (BCM) (also known as the Common Body Controller/CBC). When the sensor is exposed to temperatures above 60° C (130° F), or if the sensor circuit is shorted, 60° C (130° F) will appear in the display in place of the temperature. When the sensor is exposed to temperatures below - 40° C (- 40° F) or if the sensor circuit is open, - 40° C (- 40° F) will appear in the display.
The ambient temperature sensor circuit can be diagnosed using the following Temperature System Test and Sensor Test. If the temperature sensor and circuit are confirmed to be OK, but the temperature display is inoperative or incorrect, further testing of the Instrument Cluster (IC) (also known as the Common Instrument Cluster/CIC) may be necessary. Refer to DIAGNOSIS AND TESTING .