AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM(except Sedan), Diagnostic DTC:B2424 and B2425

DTC Code DTC Name
B2424 Headlight Leveling Motor LH Communication Malfunction
B2425 Headlight Leveling Motor RH Communication Malfunction

DESCRIPTION

The headlight swivel ECU assembly receives a signal from each headlight leveling motor using LIN communication.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2424

Headlight Leveling Motor LH Communication Malfunction

  • Malfunction in headlight leveling motor LH

  • Open or short in headlight leveling motor LH communication circuit

  • Headlight unit LH (Headlight leveling motor LH)

  • Harness or connector

  • Headlight swivel ECU assembly

B2425

Headlight Leveling Motor RH Communication Malfunction

  • Malfunction in headlight leveling motor RH

  • Open or short in headlight leveling motor RH communication circuit

  • Headlight unit RH (Headlight leveling motor RH)

  • Harness or connector

  • Headlight swivel ECU assembly

WIRING DIAGRAM

E314479E08

CAUTION / NOTICE / HINT

Note:

If the headlight swivel ECU assembly has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight swivel ECU assembly.

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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

      OK

      DTC B2424 and B2425 are not output.

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

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    NG

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - HEADLIGHT ASSEMBLY)

    1. Disconnect the A93 headlight swivel ECU assembly connector.

    2. Disconnect the A163 headlight assembly LH connector or A162 headlight assembly RH connector.

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

      Standard Resistance

      Table 1. LH Side (DTC B2424)

      Tester Connection

      Condition

      Specified Condition

      A93-30 (LHT) - A163-1 (LHM+)

      Always

      Below 1 Ω

      A93-30 (LHT) - Body ground

      Always

      10 kΩ or higher
      Table 2. RH Side (DTC B2425)

      Tester Connection

      Condition

      Specified Condition

      A93-11 (RHT) - A162-1 (RHM+)

      Always

      Below 1 Ω

      A93-11 (RHT) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE HEADLIGHT UNIT (HEADLIGHT LEVELING MOTOR)

    1. Replace the headlight unit (headlight leveling motor) with a new or known good one.

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    2. Check for DTCs.

      Click here

      Body Electrical > AFS > Trouble Codes

      OK

      DTC B2424 and B2425 are not output.

    Result

    Proceed to

    OK

    NG
    OK

    END (HEADLIGHT UNIT (HEADLIGHT LEVELING MOTOR) WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY

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