U0163
NetworkModule Communicationlow severityLost Communication with Navigation Module
What U0163 Means
Cannot communicate with the navigation processing module separate from the display.
Symptoms
- Navigation function unavailable
- Map calculations not processing
- Route guidance not working
Common Causes
- Navigation processor failure
- CAN bus wiring
- Module power loss
- Fuse blown
- GPS antenna issue
Diagnostic Steps
- Check navigation module fuse
- Test power and ground
- Check CAN wiring
- Verify GPS antenna connection
- Test module with diagnostics
Where to start: Check fuses and GPS antenna cable. Navigation processor may need map data update.
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