Compass/Mini-Trip Computer (CMTC)

The CMTC is located in the overhead console on models equipped with this option. The CMTC features large Vacuum Fluorescent Displayed (VFD) screen for displaying information and 4 back lit push function switches labeled C/T, RESET, STEP, and US/M (United States/Metric Scale). The CMTC module contains a central processing unit and interfaces with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) data bus network. The PCI data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, reduce internal controller hardware, and reduce component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new features capabilities.

The CMTC includes the following display options:

1. Compass and Thermometer
   
   Provides the outside temperature and one of 8 compass readings to indicate the direction the vehicle is facing.
2. Average Fuel Economy
   
   Shows the average fuel economy since the last trip computer reset.
3. Distance to Empty
   
   Shows the estimated distance that can be travelled with the fuel remaining in the fuel tank. This estimated distance is computed using the average miles per gallon from the last 30 gallons of fuel used.
4. Instant Fuel Economy
   
   Shows the present fuel economy based upon the current vehicle distance and fuel used information.
5. Trip Odometer
   
   Shows the distance travelled since the last trip computer reset.
6. Elapsed Time
   
   Shows the accumulated ignition on time since the last trip computer reset.
7. Blank Screen
   
   The CMTC compass/thermometer/trip computer VFD is turned off.

If the vehicle is equipped with the optional Universal Transmitter, the CMTC will also display messages and an icon indicating when the Universal Transmitter is being trained, which of the 3 transmitter buttons is transmitting, and when the transceiver is cleared.

The CMTC module cannot be repaired, and is available for service only as a unit. This unit includes the push button switches and the plastic module and display lens. If any of these components is faulty or damaged, the complete CMTC module must be replaced. The incandescent bulbs used for CMTC push button back lighting are available for service replacement.