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. for LED Headlight (w/ AFS)

    A01NLYME23

  2. except LED Headlight (w/ AFS)

    A01NIN9E12

  3. except LED Headlight (w/o AFS)

    A01NIN9E13

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 Power 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 Power 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 A95 headlight assembly LH connector or A101 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) - A95-3 (SMBL) Always Below 1 Ω
        A53-23 (SMGL) - A95-1 (LHE) Always Below 1 Ω
        A53-30 (LH+) - A95-6 (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) - A101-3 (SMBR) Always Below 1 Ω
        A53-24 (SMGR) - A101-1 (RHE) Always Below 1 Ω
        A53-11 (RH+) - A101-6 (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) - A95-2 (LHB1) Always Below 1 Ω
        A53-23 (SMGL) - A95-1 (LHE) Always Below 1 Ω
        A53-30 (LH+) - A95-6 (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) - A101-2 (RHB1) Always Below 1 Ω
        A53-24 (SMGR) - A101-1 (RHE) Always Below 1 Ω
        A53-11 (RH+) - A101-6 (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. A01NIDHE04
      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) Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V
        RH Side (B2425)
        Tester Connection Condition Specified Condition
        A53-2 (SMBR) - A53-24 (SMGR) Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V
    3. A01NIDHE18
      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) Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V
        RH Side (B2425)
        Tester Connection Condition Specified Condition
        A53-4 (RHT) - A53-24 (SMGR) Power switch off Below 1 V
        Power switch on (IG) 11 to 14 V
      Result
      Result Proceed to
      OK (for LED Headlight) A
      OK (except LED Headlight) B
      NG C

    B

    CHECK HEADLIGHT UNIT (HEADLIGHT SWIVEL MOTOR) Click here

    C

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Click here

    A

  6. INSPECT HEADLIGHT UNIT (HARNESS)


    1. Remove the headlight unit Click here.

    2. Remove the headlight swivel motor Click here.

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

      A01NIUIE03
      Text in Illustration
      *1

      Component without harness connected

      (Headlight Unit LH)

      		 *2

      Front view of wire harness connector

      (to Headlight Swivel Motor LH)
      *3

      Component without harness connected

      (Headlight Unit RH)

      		 *4

      Front view of wire harness connector

      (to Headlight Swivel Motor RH)
      Standard Resistance
      LH Side (B2424)
      Tester Connection Condition Specified Condition
      A95-3 (SMBL) - 1 (IG) Always Below 1 Ω
      A95-6 (LHM+) - 4 (LIN) Always Below 1 Ω
      A95-1 (LHE) - 3 (GND) Always Below 1 Ω
      A95-3 (SMBL) - Body ground Always 10 kΩ or higher
      A95-6 (LHM+) - Body ground Always 10 kΩ or higher
      A95-1 (LHE) - Body ground Always 10 kΩ or higher
      RH Side (B2425)
      Tester Connection Condition Specified Condition
      A101-3 (SMBR) - 1 (IG) Always Below 1 Ω
      A101-6 (RHM+) - 4 (LIN) Always Below 1 Ω
      A101-1 (RHE) - 3 (GND) Always Below 1 Ω
      A101-3 (SMBR) - Body ground Always 10 kΩ or higher
      A101-6 (RHM+) - Body ground Always 10 kΩ or higher
      A101-1 (RHE) - Body ground Always 10 kΩ or higher

    NG

    REPLACE HEADLIGHT UNIT Click here

    OK

  7. CHECK HEADLIGHT SWIVEL MOTOR


    1. Replace the 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)

  8. 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 UNIT (HEADLIGHT SWIVEL MOTOR) WAS DEFECTIVE)