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 headlight leveling motor.

DTC Code DTC Detection Condition Trouble Area
B2424

Either condition is met:


  • A malfunction in the headlight leveling motor LH.

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


  • Headlight assembly LH

  • Harness or connector

  • Headlight swivel ECU assembly

B2425

Either condition is met:


  • A malfunction in the headlight leveling motor RH.

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


  • Headlight assembly RH

  • Harness or connector

  • Headlight swivel ECU assembly

WIRING DIAGRAM

A004RIEE66

CAUTION / NOTICE / HINT

Tech Tips

Inspect the fuses for circuits related to this system before performing the following 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.

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / AFS / Data List.

    5. Using the intelligent tester, read the Data List.

      AFS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      +B Headlight swivel ECU power source voltage/Min.: 0 V, Max.: 19.75 V 11 to 14 V -
      OK
      Power supply voltage is 11 to 14 V.

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


    1. A004T4EE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Headlight Swivel ECU)

      Disconnect the A38 headlight swivel ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A38-22 (E1) - Body ground Always Below 1 Ω

    NG
    OK
  4. CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU - HEADLIGHT)

    A004QJJE02
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Headlight Swivel ECU Assembly)

    *2 for LH
    *3 for RH
    *4

    Front view of wire harness connector

    (to Headlight Assembly LH)

    *5

    Front view of wire harness connector

    (to Headlight Assembly RH)


    1. Disconnect the A38 headlight swivel ECU connector.

    2. Disconnect the A26*1 and A56*2 headlight connectors.


      • *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
      A38-3 (LL1+) - A26-1 (LHIG) Always Below 1 Ω
      A38-27 (LL1-) - A26-3 (LH E)
      A38-30 (LHT) - A26-2 (LH T)
      A38-3 (LL1+) - Body ground Always 10 kΩ or higher
      A38-27 (LL1-) - Body ground
      A38-30 (LHT) - Body ground
      for RH
      Tester Connection Condition Specified Condition
      A38-28 (LR1-) - A56-3 (RH E) Always Below 1 Ω
      A38-4 (LR1+) - A56-1 (RHIG)
      A38-11 (RHT) - A56-2 (RH T)
      A38-4 (LR1+) - Body ground Always 10 kΩ or higher
      A38-28 (LR1-) - Body ground
      A38-11 (RHT) - Body ground

    NG
    OK
  5. CHECK HEADLIGHT LEVELING MOTOR


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

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 output does not occur.

    OK
    NG