HORN SYSTEM, Diagnostic DTC:B2484

DTC Code DTC Name
B2484 Horn Circuit Transistor

DESCRIPTION

This DTC is output when one of the following occurs: 1) vehicle horn (high pitched or low pitched) is malfunctioning; 2) front controller is malfunctioning; or 3) the wire harness between the front controller and vehicle horn is open or shorted.

DTC Code DTC Detection Condition Trouble Area
B2484 Horn system malfunction

  • High pitched horn

  • Low pitched horn

  • Front controller

  • Harness or connector

WIRING DIAGRAM

A000U4CE03

PROCEDURE


  1. CHECK HORN ASSEMBLY (OPERATION)


    1. Check if the horns sound normally.

      Result
      Result Proceed to
      One horn does not sound A
      Both horns do not sound B

      Tech Tips

      If both horns do not sound, there may be a malfunction in the front controller.


    B

    REPLACE FRONT CONTROLLER

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VEHICLE HORNS)


    1. Operate the intelligent tester according to the steps on the display and select "Active Test".

      Body No.5
      Tester Display Test Part Control Range Diagnostic Note
      Horn Relay Vehicle horns ON / OFF -
      OK
      Horn operates normally.

    OK

    REPLACE FRONT CONTROLLER

    NG

  3. INSPECT HORN ASSEMBLY

    A000U07E11

    1. Remove the low pitched horn (see page ) or high pitched horn Click here.

    2. Apply battery voltage and check the operation of the horn.

      OK
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal 1

      Battery negative (-) → Horn bracket

      		 Horn sounds
      Result
      Result Proceed to
      Both horns sound normally A
      High pitched horn does not sound B
      Low pitched horn does not sound C

    B

    REPLACE HIGH PITCHED HORN ASSEMBLY Click here

    C

    REPLACE LOW PITCHED HORN ASSEMBLY Click here

    A

  4. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HORN)

    A000V8OE02

    1. Disconnect the B14 front controller connector.

    2. Disconnect the B6*1 or B10*2 horn connector.

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

      Standard resistance
      for high pitched horn
      Tester Connection Condition Specified Condition
      B14-2 (HORH) - B6-1 Always Below 1 Ω
      B14-2 (HORH) or B6-1 - Body ground Always 10 kΩ or higher
      for low pitched horn
      Tester Connection Condition Specified Condition
      B14-1 (HORL) - B10-1 Always Below 1 Ω
      B14-1 (HORL) or B10-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT CONTROLLER

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR