Compass/Mini-Trip Computer Or Electronic Vehicle Information Center: Notes

The Compass/Mini-Trip Computer (CMTC) or Electronic Vehicle Information Center (EVIC) is located in the overhead console. The CMTC or EVIC supplements the standard vehicle instrumentation. The CMTC and EVIC use a vacuum fluorescent (VF) display to supply the vehicle operator with a compass heading, outdoor temperature, average fuel economy, distance to empty, instantaneous fuel economy, trip odometer, elapsed ignition on time, distance to service, warning messages, and service messages.

The difference between a CMTC and an EVIC is that only the EVIC provides additional memory and feature programming. The EVIC is capable of displaying memory system messages when the vehicle is equipped with memory systems. The EVIC also provides the interface to enable and disable vehicle programmable features when the vehicle is equipped with certain features. If equipped, the EVIC is also available with an integrated Universal Garage Door Opener (UGDO) known as HomeLink®. Also if equipped, the EVIC is available with a Tire Pressure Monitoring (TPM) System.

Both the CMTC and EVIC function buttons are labeled C/T, RESET, STEP, and MENU. The three UGDO buttons are labeled with dots to indicate the channel number.

The BCM supplies most of the information displayed by the CMTC/EVIC. Display information, except for the internal compass function, is received over the PCI bus. The CMTC/EVIC sends and receives data over the PCI bus, communicating with the BCM and PCM. Tire Pressure Monitoring System information is received by the EVIC in the form of radio transmissions. The tire pressure sensors are mounted to the vehicle wheels. For complete information, refer to TIRE PRESSURE MONITORING SYSTEM .

VEHICLE INFORMATION DISPLAY 

The CMTC/EVIC provides the following functions:

• Compass direction
• Outside temperature
• Elapsed ignition on time
• Distance to empty
• Average fuel economy
• Trip odometer
• Distance to service
• Driver alert messages:
  • TURN SIGNAL ON (with vehicle graphic)
  • PERFORM SERVICE
  • DOOR OPEN (individual or multiple doors, with graphic)
  • WASHER FLUID LOW (with graphic)
  • RKE FOB BATTERY LOW
  • LAMP OUT

An audible chime or chimes will accompany any displayed warning messages. Chime requests with an OPEN message are dependent upon vehicle speed.

The CMTC/EVIC will not display information for any of the screens for which it did not receive the proper PCI bus data. Refer to the symptom list in OVERHEAD CONSOLE  information for problems related to the CMTC/EVIC.

The CMTC/EVIC receives the following messages from the Body Control Module (BCM):

• Verification of US/Metric status
• VF display dimming brightness and exterior lamp status
• Elapsed Ignition On Time data
• Fuel Economy
• Distance to Empty
• Outside Temperature
• Distance to service
• Driver warning messages

The CMTC/EVIC receives the following messages from the Powertrain Control Module (PCM):

• Trip Odometer data
• Vehicle Speed

The CMTC/EVIC transmits the following messages to the BCM:

• Status Request: Beep, Reset, US/M Toggle
• Current Display

STEP BUTTON 

The STEP Button can be used in one of the following three ways:

1. To sequentially select one of seven displays or blank display in the following order:
   • Average Fuel Economy
   • Distance to Empty
   • Trip Odometer
   • Time Elapsed
   • Distance to Service Message
   • Individual Tire Pressure (When equipped with TPM.)
   • Off (Blank)
2. To set the magnetic variance zone when VARIANCE = X (X = 1 - 15) is indicated in the VF Display.
3. To select the displayed programmable feature setting. (When equipped.)

MENU BUTTON 

Use the MENU button to sequentially step the EVIC through the programmable features.

Use the MENU button to enter the Tire Pressure Monitoring (TPM) Training Procedure.

RESET BUTTON 

The RESET Button has two different functions:

1. To clear the trip functions that may be reset
2. To enter and exit the diagnostic mode

Pressing the RESET button once will clear the trip function that is currently being displayed (except Distance to Service) and the CMTC/EVIC will send a PCI bus beep request to the BCM. If the RESET button is pressed again within 3 seconds, the CMTC/EVIC will reset ALL of the trip functions and an additional beep request is sent to the BCM. The trip functions that may be reset are:

• Average Fuel Economy
• Trip Odometer
• Elapsed Time

A reset will only occur if one of the trip functions that may be reset is currently being displayed. Pressing the RESET button for more than three (3) seconds resets the Distance to Service function while the Distance to Service message is being displayed. The CMTC/EVIC module will send a beep request to the BCM.

Simultaneously pressing the RESET button and the C/T button while turning the ignition from Off to On will enter the CMTC/EVIC into the self-diagnostic mode.

COMPASS/TEMPERATURE (C/T) BUTTON 

Actuating the Compass/Temperature Button (C/T) will cause the CMTC/EVIC to display the compass and temperature information. This function will operate from another traveler display or from the programmable feature mode.