Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 the symptom list in DIAGNOSTIC INFORMATION AND PROCEDURES 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
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.