DTC B124A: Automatic High Beam Mirror; DTC B124C: Automatic High Beam Camera: Procedure

CHECK FOR DTC
1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Check for DTCs. Refer to DTC CHECK / CLEAR .
  OK
  
  DTC B124A or B124C is not output.
NG → See step 3

OK → See step 2
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
REPLACE INNER REAR VIEW MIRROR ASSEMBLY. Refer to REMOVAL