DTC B2420: HL AutoLeveling ECU Failure [10/2014 - ]: Procedure

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
2. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   OK

   DTC B2420 is not output.

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result: 

NG 

REPLACE HEADLIGHT LEVELING ECU ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )