LIGHTING SYSTEM, Diagnostic DTC:B2420, B2420

DTC Code DTC Name
B2420 AFS ECU Malfunction
B2420 HL AutoLeveling ECU Failure

DESCRIPTION

When the headlight leveling ECU*1 or headlight swivel ECU*2 detects a malfunction in itself, this DTC is stored.


DTC Code DTC Detection Condition Trouble Area
B2420

  • A malfunction in the headlight leveling ECU. (w/ Static Headlight Auto Leveling)

  • A malfunction in the headlight swivel ECU. (w/ Dynamic Headlight Auto Leveling)

  • Headlight leveling ECU assembly (w/ Static Headlight Auto Leveling)

  • Headlight swivel ECU assembly (w/ Dynamic Headlight Auto Leveling)

INSPECTION PROCEDURE

Note

After replacing the headlight leveling ECU*1 or headlight swivel ECU*2, initialization of the ECU is necessary (except w/ Dynamic Headlight Auto Leveling) Click here.


  • *1: w/ Static Headlight Auto Leveling

  • *2: w/ Dynamic Headlight Auto Leveling

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 (w/ Static Headlight Auto Leveling) B
      NG (w/ Dynamic Headlight Auto Leveling) (for LHD) C
      NG (w/ Dynamic Headlight Auto Leveling) (for RHD) D

    B

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    C

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY Click here

    D

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here