DTC B124B: Automatic High Beam System [12/2013 - 11/2016]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Main Body > Clear DTCs 

2. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Main Body > Trouble Codes 

   OK

   DTC B124B is not output.

   Result

   Result	Proceed to
   DTC B124B is not output	A
   DTC B124B is output	B

Result:  1

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016] 

Result:  2

B 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]

   Chassis > Lane Departure Alert > Trouble Codes 

   Result

   Result	Proceed to
   Lane departure alert system DTCs are not output	A
   Lane departure alert system DTCs are output	B
   CAN communication system DTCs are output	C

Result:  2

B 

GO TO LANE DEPARTURE ALERT SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016] 

Result:  3

C 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016] 

Result:  1

A 

See step  3

1. Replace the lane departure warning camera with a new or known good one.

   Refer to REMOVAL [12/2013 - 11/2016]

2. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Main Body > Trouble Codes 

   OK

   DTC B124B is not output.

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

END (LANE DEPARTURE WARNING CAMERA WAS DEFECTIVE) 

Result:  2

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2013 - ]