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:


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

A01D6BCE03
*a Inner Rear View Mirror Assembly (Automatic High Beam Sensor)
*b AFS ECU (Headlight Swivel ECU Assembly)
*c LIN Communication Line

CAUTION / NOTICE / HINT

Tech Tips

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 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