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 AFS ECU (headlight swivel ECU assembly) receives a signal from each headlight swivel motor using LIN communication.

DTC No. DTC Detection Condition Trouble Area
B2424

  • Malfunction in headlight swivel motor LH

  • Open or short in headlight swivel motor LH communication circuit

  • Headlight swivel motor LH

  • Harness or connector

  • AFS ECU (headlight swivel ECU assembly)
B2425

  • Malfunction in headlight swivel motor RH

  • Open or short in headlight swivel motor RH communication circuit

  • Headlight swivel motor RH

  • Harness or connector

  • AFS ECU (headlight swivel ECU assembly)

WIRING DIAGRAM


  1. w/ AFS

    A019OIDE14

  2. w/o AFS

    A019OIDE10

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 is not output.

    NG

    CHECK HARNESS AND CONNECTOR (BATTERY - AFS ECU) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK HARNESS AND CONNECTOR (BATTERY - AFS ECU)


    1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

    2. w/ AFS


      1. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        A53-14 (IGS) - Body ground Engine switch on (IG) 11 to 14 V

    3. w/o AFS


      1. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        A53-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (AFS ECU - BODY GROUND)


    1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A53-22 (E1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

    2. Disconnect the A71 headlight assembly LH connector or A73 headlight assembly RH connector.

    3. w/ AFS


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

        Standard Resistance
        LH Side (B2424)
        Tester Connection Condition Specified Condition
        A53-1 (SMBL) - A71-3 (SMBL) Always Below 1 Ω
        A53-23 (SMGL) - A71-1 (LH E) Always Below 1 Ω
        A53-30 (LH+) - A71-6 (LHM+) Always Below 1 Ω
        A53-1 (SMBL) - Body ground Always 10 kΩ or higher
        A53-23 (SMGL) - Body ground Always 10 kΩ or higher
        A53-30 (LH+) - Body ground Always 10 kΩ or higher
        RH Side (B2425)
        Tester Connection Condition Specified Condition
        A53-2 (SMBR) - A73-3 (SMBR) Always Below 1 Ω
        A53-24 (SMGR) - A73-1 (RH E) Always Below 1 Ω
        A53-11 (RH+) - A73-6 (RHM+) Always Below 1 Ω
        A53-2 (SMBR) - Body ground Always 10 kΩ or higher
        A53-24 (SMGR) - Body ground Always 10 kΩ or higher
        A53-11 (RH+) - Body ground Always 10 kΩ or higher

    4. w/o AFS


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

        Standard Resistance
        LH Side (B2424)
        Tester Connection Condition Specified Condition
        A53-3 (LHT) - A71-2 (LHB1) Always Below 1 Ω
        A53-23 (SMGL) - A71-1 (LH E) Always Below 1 Ω
        A53-30 (LH+) - A71-6 (LHM+) Always Below 1 Ω
        A53-3 (LHT) - Body ground Always 10 kΩ or higher
        A53-23 (SMGL) - Body ground Always 10 kΩ or higher
        A53-30 (LH+) - Body ground Always 10 kΩ or higher
        RH Side (B2425)
        Tester Connection Condition Specified Condition
        A53-4 (RHT) - A73-2 (RHB1) Always Below 1 Ω
        A53-24 (SMGR) - A73-1 (RH E) Always Below 1 Ω
        A53-11 (RH+) - A73-6 (RHM+) Always Below 1 Ω
        A53-4 (RHT) - Body ground Always 10 kΩ or higher
        A53-24 (SMGR) - Body ground Always 10 kΩ or higher
        A53-11 (RH+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)


    1. Reconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

    2. A019M4NE04
      Text in Illustration
      *1

      Component with harness connected

      (AFS ECU (Headlight Swivel ECU Assembly))

      w/ AFS


      1. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        LH Side (B2424)
        Tester Connection Condition Specified Condition
        A53-1 (SMBL) - A53-23 (SMGL) Engine switch off Below 1 V
        Engine switch on (IG) 11 to 14 V
        RH Side (B2425)
        Tester Connection Condition Specified Condition
        A53-2 (SMBR) - A53-24 (SMGR) Engine switch off Below 1 V
        Engine switch on (IG) 11 to 14 V
    3. A019M4NE18
      Text in Illustration
      *1

      Component with harness connected

      (AFS ECU (Headlight Swivel ECU Assembly))

      w/o AFS


      1. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        LH Side (B2424)
        Tester Connection Condition Specified Condition
        A53-3 (LHT) - A53-23 (SMGL) Engine switch off Below 1 V
        Engine switch on (IG) 11 to 14 V
        RH Side (B2425)
        Tester Connection Condition Specified Condition
        A53-4 (RHT) - A53-24 (SMGR) Engine switch off Below 1 V
        Engine switch on (IG) 11 to 14 V

    NG

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Click here

    OK

  6. CHECK HEADLIGHT UNIT (HEADLIGHT SWIVEL MOTOR)


    1. Replace the headlight unit (headlight swivel motor) with a new or normally functioning one Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 is not output.

    NG

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Click here

    OK

    END (HEADLIGHT SWIVEL MOTOR WAS DEFECTIVE)