DTC B2439: Headlight LH Circuit; DTC B243A: Headlight RH Circuit [11/2020 - 11/2021]: Procedure

Pre-procedure1

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 

2. 10 seconds elapse after turning the ignition switch ON and illuminating the low beam headlights using the light control switch.

   Procedure1

3. 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
   B2439 and B243A are not output	A
   B2439 is output	B
   B243A is output	C

   Post-procedure1

4. None

Result: 

A 

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

Result: 

C 

See step  5

Result: 

B 

See step  2

1. Interchange the headlight unit assembly LH with RH and connect the connectors.

   HINT: 

   Refer to DISASSEMBLY [11/2020 - 11/2021]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

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  4

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
   B2439 is output	A
   B243A is output	B

Result: 

A 

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [11/2020 - 11/2021] 

Result: 

B 

REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [11/2020 - 11/2021] 

1. Interchange the headlight unit assembly RH with LH and connect the connectors.

   HINT: 

   Refer to DISASSEMBLY [11/2020 - 11/2021]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

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  7

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
   B243A is output	A
   B2439 is output	B

Result: 

A 

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [11/2020 - 11/2021] 

Result: 

B 

REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [11/2020 - 11/2021]