Ambient Temperature Sensor Fault Codes: Notes

The outside temperature function is supported by the Ambient Temperature Sensor (ATS), a signal and ground circuit hardwired to the BCM, and the EVIC display. If the EVIC display indicates 54°C (130°F) or the ATS sense circuit is shorted to ground, the temp display will be 54°C (130°F) to indicate a SHORT circuit condition. If the EVIC display indicates -40°C (-40°F) or the ATS sense circuit is open, the temp display will be -40°C (-40°F) to indicate an OPEN circuit condition. If there is an OPEN or SHORT circuit condition, it must be repaired before the EVIC VFD can be tested.

The ATS is supported by the BCM. Ambient Temperature Sensor DTCs will be recorded in the BCM. The ATS can be diagnosed using the AMBIENT TEMPERATURE SENSOR TEST  . Test the ATS circuits using appropriate test in DIAGNOSTIC TESTS or SYMPTOM TESTS. If the EVIC passes the self test, and the ATS, the circuits, and PCI bus communications are confirmed to be OK, but the EVIC temperature display is inoperative or incorrect, replace the BCM.