DTC B15A0: LAN Master Malfunction; DTC B15AD: Navigation Processor Malfunction: Procedure

CHECK DTC
1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Recheck for DTCs and check if the same DTC is output again.
  OK
  
  No DTCs are output.
NG → See step 3

OK → See step 2
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL