B2420

LIGHTING (EXT): LIGHTING SYSTEM: B2420: HL AutoLeveling ECU Failure
B2420 - HL AutoLeveling ECU Failure

DESCRIPTION

When the headlight leveling ECU assembly detects a malfunction in itself, the DTC is stored.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B2420 is not output.

NG -- REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting