AUTOMATIC HIGH BEAM SYSTEM, Diagnostic DTC:B2461

DTC Code DTC Name
B2461 Vehicle Information not written in AHB ECU

DESCRIPTION

This DTC is output when either of the following conditions is met:

  • Vehicle information has not been synchronized after the AFS ECU (headlight swivel ECU assembly) had been replaced.

  • Vehicle information cannot be stored in the inner rear view mirror assembly (automatic high beam sensor).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2461

Vehicle Information not written in AHB ECU

Synchronization of vehicle information is not completed

  • Synchronizing the vehicle information

  • Inner rear view mirror assembly (automatic high beam sensor)

  • AFS ECU (headlight swivel ECU assembly)

WIRING DIAGRAM

E240325E03

CAUTION / NOTICE / HINT

Tip:

If DTC B2451 is output at the same time, perform troubleshooting for DTC B2451 first.

Click here

PROCEDURE

  1. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > AFS > Clear DTCs

    2. Check for DTCs.

      Click here

      Body Electrical > AFS > Trouble Codes

    Result

    Result

    Proceed to

    DTCs are not output

    A

    Only DTC B2461 is output

    B

    DTC B2461 and B2451 are output

    C
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    C

    GO TO DTC B2451

    Click here

    B

  2. CHECK HARNESS AND CONNECTOR (AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) - INNER REAR VIEW MIRROR ASSEMBLY (AUTOMATIC HIGH BEAM SENSOR))

    1. Disconnect the A93 AFS ECU (headlight swivel ECU assembly) connector.

    2. Disconnect the O3 inner rear view mirror assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A93-30 (LHT) - O3-5 (LIN)

      Always

      Below 1 Ω

      A93-30 (LHT) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK INNER REAR VIEW MIRROR ASSEMBLY

    1. Replace the inner rear view mirror assembly with a new or known good one.

      Click here

    2. Check for DTCs.

      Click here

      Body Electrical > AFS > Trouble Codes

      OK

      DTC B2461 is not output.

    Result

    Proceed to

    OK

    NG
    OK

    END (INNER REAR VIEW MIRROR ASSEMBLY (AUTOMATIC HIGH BEAM SENSOR) WAS DEFECTIVE)

    NG

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

    Click here