Compass/Mini-Trip Computer VF Display Messages

The CMTC will not display information for any of the screens for which it did not receive the proper PCI bus data. Refer to DIAGNOSTIC INFORMATION AND PROCEDURES  in this article for problems related to the CMTC.

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

• Verification of US/Metric status.
• VF display dimming brightness and exterior lamp status.
• Trip Odometer data.
• Elapsed Ignition On Time data.
• Fuel Economy.
• Distance to Empty.
• Outside Temperature.

The CMTC transmits the following messages to the BCM:

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

The CMTC receives the following message from PCM:

• Vehicle Speed.