DTC B124B: Automatic High Beam System [10/2015 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: System Select / Health Check.
4. Check for DTCs.

   Result	Proceed to
   Only DTC B124B is output	A
   DTC B124B is output at the same time	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. 

Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2015 - ] .

Result: 

A 

See step  2

1. Check the forward recognition camera system.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] .

   OK

   Forward recognition camera system is normal.

   Results	Proceed to
   	OK
   	NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). 

Refer to REMOVAL [12/2012 - ] .

Result: 

NG 

GO TO FORWARD RECOGNITION CAMERA SYSTEM. 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] .