DTC B1499/99: Multiplex Communication Circuit: Procedure

CHECK DTC OUTPUT
1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for DTC. Refer to DTC CHECK / CLEAR .
  OK
  
  DTC B1499/99 is not output
NG → See step 2

OK → See step 3
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING