DTC B124B: Automatic High Beam System [08/2015 - 08/2019]: Procedure

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
2. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

   OK

   DTC B124B is not output.

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

NG 

See step  2

1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
   RESULT
   
   

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

Result: 

A 

GO TO DTC CHART. Refer To: DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 08/2019] 

(Refer to DTC B2415: Vehicle Speed Sensor Malfunction [08/2015 - 08/2019] )

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

C 

REPLACE INNER REAR VIEW MIRROR ASSEMBLY 

(Refer to REMOVAL [08/2015 - 08/2019] )