U0159low severityNetwork
Lost Communication with Navigation Display Module
on 2012 Toyota 4Runner 4.0L V6 · 4WD
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.
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