Average Fuel Economy
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 average fuel economy information from the BCM over the PCI bus line. If the CMTC displays (- -) instead of an average fuel economy value, it is not receiving a PCI bus message for the average fuel economy from the BCM. To diagnose the PCI bus line and the BCM, see BODY CONTROL MODULES - CONCORDE, INTREPID & 300M article.