Section 55 (Overhead Console): Troubleshooting: Temperature
WARNING: This page is about a different car, the 2003 Chrysler Concorde, 2003 Chrysler 300M, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
The CMTC receives PCI bus messages from the BCM for all displayed information except the compass display. If a dash (-) is displayed, the CMTC is not receiving a PCI bus message from the BCM. To diagnose the PCI bus line and the BCM, see BODY CONTROL MODULES - CONCORDE, INTREPID & 300M article.
If the CMTC displays a temperature more than 130°F (54°C), check for a short circuit between the temperature sensor and the BCM. If the CMTC displays a temperature less than -67°F (-40°C), check for an open circuit between the temperature sensor and the BCM.