Ambient Temperature Sensor Fault Codes

WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The outside temperature function is supported by the ambient temperature sensor (ATS), a signal and ground circuit hardwired to the FCM or the PCM, and the CMTC display.

If the CMTC display indicates 54°C (130°F) or the ATS sense circuit is open, the temp display will be 54°C (130°F) to indicate an OPEN circuit condition.

If the CMTC display indicates -40°C (-40°F) or the ATS sense circuit is shorted to ground, the temp display will be -40°C (-40°F) to indicate a SHORT circuit condition.

If there is an OPEN or SHORT circuit condition, it must be repaired before the CMTC VFD can be tested.

The ATS is supported by the FCM or PCM. Ambient Temperature Sensor DTCs will be recorded in the FCM or PCM. The ATS can be diagnosed using the following Sensor Test. Test the ATS circuits using the diagnostics in the Body Diagnostic Procedures Manual. If the CMTC passes the self test, and the ATS, the circuits, and PCI bus communications are confirmed to be OK, but the CMTC temperature display is inoperative or incorrect, replace the FCM or PCM as required.