U0159low severityNetwork
Lost Communication with Navigation Display Module
on 2004 Mazda Mazda3 2.3L I4 · FWD
What this code means
Cannot communicate with the navigation system display module.
Symptoms
- Navigation screen blank
- Map not displaying
- Navigation voice prompts not working
- Touchscreen unresponsive
Common causes
- Navigation module failure
- CAN/MOST bus wiring
- Module power loss
- Fuse blown
- Display unit failure
Diagnostic steps
- Check navigation module fuse
- Test power and ground
- Check data bus wiring
- Inspect display connections
- Test module with diagnostics
Repair notes
Check fuses and display power supply. Navigation module may need software update.
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus