DTC B124C: Automatic High Beam Camera [04/2013 - 10/2016]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [04/2013 - 09/2020]

   Body Electrical > Main Body > Clear DTCs 

2. Check for DTCs.

   Refer to DTC CHECK / CLEAR [04/2013 - 09/2020]

   Body Electrical > Main Body > Trouble Codes 

   Result

   Result	Proceed to
   DTC B124C is not output	A
   DTC B124C is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 06/2014]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2014 - 08/2015]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 10/2016] 

Result: 

B 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [04/2013 - 10/2016]

   Chassis > Lane Departure Alert > Trouble Codes 

   OK

   Lane departure alert system DTCs are not output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO LANE DEPARTURE ALERT SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 10/2016] 

Result: 

OK 

See step  3

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

   Refer to REMOVAL [04/2013 - 10/2016]

2. Check for DTCs.

   Refer to DTC CHECK / CLEAR [04/2013 - 09/2020]

   Body Electrical > Main Body > Trouble Codes 

   OK

   DTC B124C is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (LANE DEPARTURE WARNING CAMERA WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [04/2013 - ]