DTC B124B: Automatic High Beam System: Procedure

CHECK FOR DTC
1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Check for DTCs. Refer to DTC CHECK / CLEAR .
  OK
  
  DTC B124B is not output.
NG → See step 2

OK → See step 4

CHECK FOR DTC

Check for DTCs. Refer to DTC CHECK / CLEAR .

RESULT

Result	Proceed to
DTC B2414 is output	A
DTC B2415 is output	B
DTC U0126, DTC U0129 or DTC U0101 is output	C
Other DTC is not output	D

B → See step 5

C → See step 6

D → See step 7

A → See step 3

GO TO DTC CHART. Refer to DTC B2414: Steering Position Sensor Malfunction
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
GO TO DTC CHART. Refer to DTC B2415: Vehicle Speed Sensor Malfunction
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING
REPLACE INNER REAR VIEW MIRROR ASSEMBLY. Refer to REMOVAL