LIGHTING SYSTEM, Diagnostic DTC:B2420

DTC Code DTC Name
B2420 HL AutoLeveling ECU Failure

DESCRIPTION

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

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

CAUTION / NOTICE / HINT

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.

      Result
      Result Proceed to
      DTC B2420 is not output A
      DTC B2420 is output (for LHD) B
      DTC B2420 is output (for RHD) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    C

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here