DTC B2439: Headlamp LH Circuit; DTC B243A: Headlamp RH Circuit [09/2014 - 03/2019]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 03/2019]

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Turn the engine switch on (IG).
2. Operate the light control switch to turn on the low beam headlights and then turn on the high beam headlights.
3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 03/2019]

   Body Electrical > HL AutoLeveling > Trouble Codes 

   OK

   DTC B2439 and B243A are not output.

   Result

   Result	Proceed to
   OK	A
   NG (DTC B2439 is output)	B
   NG (DTC B243A is output)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 08/2016]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 03/2019] 

Result: 

C 

See step  6

Result: 

B 

See step  3

1. Replace the headlight unit assembly LH with a new or known good one.

   Refer to DISASSEMBLY [09/2014 - 03/2019]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 03/2019]

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Turn the engine switch on (IG).
2. Operate the light control switch to turn on the low beam headlights and then turn on the high beam headlights.
3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 03/2019]

   Body Electrical > HL AutoLeveling > Trouble Codes 

   OK

   DTC B2439 is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (HEADLIGHT UNIT ASSEMBLY LH WAS DEFECTIVE) 

Result: 

NG 

REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [09/2014 - 03/2019] 

1. Replace the headlight unit assembly RH with a new or known good one.

   Refer to DISASSEMBLY [09/2014 - 03/2019]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 03/2019]

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Turn the engine switch on (IG).
2. Operate the light control switch to turn on the low beam headlights and then turn on the high beam headlights.
3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 03/2019]

   Body Electrical > HL AutoLeveling > Trouble Codes 

   OK

   DTC B243A is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (HEADLIGHT UNIT ASSEMBLY RH WAS DEFECTIVE) 

Result: 

NG 

REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [09/2014 - 03/2019]