LIGHTING SYSTEM, Diagnostic DTC:B2424, B2425

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

DESCRIPTION

The headlight leveling motor operates by receiving the signal from the headlight swivel ECU. The headlight swivel ECU detects the headlight leveling motor status using the signal from the headlight leveling motor.

DTC Code DTC Detection Condition Trouble Area
B2424

  • Malfunction in the headlight leveling motor LH.

  • Open or short in the headlight leveling motor LH communication circuit.

  • Headlight leveling motor LH

  • Headlight swivel ECU assembly

  • Headlight unit LH

  • Harness or connector
B2425

  • Malfunction in the headlight leveling motor RH.

  • Open or short in the headlight leveling motor RH communication circuit.

  • Headlight leveling motor RH

  • Headlight swivel ECU assembly

  • Headlight unit RH

  • Harness or connector

WIRING DIAGRAM

A00962QE03

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 output does not occur.

    NG

    READ VALUE USING INTELLIGENT TESTER (HEADLIGHT SWIVEL ECU) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. READ VALUE USING INTELLIGENT TESTER (HEADLIGHT SWIVEL ECU)


    1. Using the intelligent tester, read the Data List Click here.

      AFS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      +B IG power supply voltage value / 0 to 19.75 V 11 to 14 V -
      OK
      Power supply voltage is 11 to 14 V.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - HEADLIGHT SWIVEL ECU ASSEMBLY)

    OK

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - BODY GROUND)


    1. A009ALYE26
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Headlight Swivel ECU Assembly)

      Disconnect the A58 headlight swivel ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A58-22 (E1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A58 headlight swivel ECU assembly connector.

    2. Disconnect the A30*1 or A31*2 headlight connector.


      • *1: for LH

      • *2: for RH

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      A58-30 (LH+) - A30-7 (LHM+) Always Below 1 Ω
      A58-30 (LH+) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      A58-11 (RH+) - A31-7 (RHM+) Always Below 1 Ω
      A58-11 (RH+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT HEADLIGHT UNIT


    1. Remove the headlight unit Click here.

    2. A0096YLE02
      Text in Illustration
      *A for LH
      *B for RH

      Disconnect the headlight leveling motor connector.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      7 (LHM+) - 2 (LHM+) Always Below 1 Ω
      for RH
      Tester Connection Condition Specified Condition
      7 (RHM+) - 2 (RHM+) Always Below 1 Ω

    NG

    REPLACE HEADLIGHT UNIT Click here

    OK

  6. CHECK HEADLIGHT LEVELING MOTOR (OPERATION)


    1. Temporarily replace the headlight leveling motor with a new or normally functioning one Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 output does not occur.

    NG

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY Click here

    OK

    END (REPLACE HEADLIGHT LEVELING MOTOR) Click here