DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [11/2021 - 12/2023]: Procedure

1. Clear the DTCs.

   for Mono Camera Type:

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Body Electrical > HL AutoLeveling (Sub) > Clear DTCs 

   for Stereo Camera Type:

   Body Electrical > AFS > Clear DTCs 

   Body Electrical > AFS (Sub) > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check for DTCs.

   for Mono Camera Type:

   Body Electrical > HL AutoLeveling > Trouble Codes 

   Body Electrical > HL AutoLeveling (Sub) > Trouble Codes 

   for Stereo Camera Type:

   Body Electrical > AFS > Trouble Codes 

   Body Electrical > AFS (Sub) > Trouble Codes 

   Result

   Result	Proceed to
   B242C and B242D are not output	A
   B242C is output	B
   B242D is output	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2020 - ] 

Result: 

B 

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [11/2021 - 12/2022]  , or refer to  REMOVAL [12/2022 - 12/2023] 

Result: 

C 

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [11/2021 - 12/2022]  , or refer to  REMOVAL [12/2022 - 12/2023]