LIGHTING SYSTEM, Diagnostic DTC:B2420

DTC Code DTC Name
B2420 HL AutoLeveling ECU Failure

DESCRIPTION

This DTC is stored when the headlight leveling ECU detects a malfunction in itself.

DTC Code DTC Detection Condition Trouble Area
B2420 A malfunction in the headlight leveling ECU. Headlight leveling ECU assembly

INSPECTION PROCEDURE

Tech Tips

After replacing the headlight leveling ECU, initialization of the ECU is necessary Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2420 output does not occur.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    C

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here