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 receives a signal from the headlight swivel motor (leveling portion) using LIN communication.

DTC Code DTC Detection Condition Trouble Area
B2424

  • Malfunction in headlight swivel motor LH (leveling portion)

  • Open or short in headlight swivel motor LH (leveling portion) communication circuit

  • Headlight swivel motor LH (leveling portion)

  • Headlight assembly LH

  • Harness or connector

  • AFS ECU
B2425

  • Malfunction in headlight swivel motor RH (leveling portion)

  • Open or short in headlight swivel motor RH (leveling portion) communication circuit

  • Headlight swivel motor RH (leveling portion)

  • Headlight assembly RH

  • Harness or connector

  • AFS ECU

WIRING DIAGRAM

A01GMPQE08

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Check for DTC Click here.

      OK
      DTC B2424 or B2425 output does not occur

    NG

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

    OK

    USE SIMULATION METHOD TO CHECK Click here

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


    1. A01GJVFE48

      Disconnect the A37 AFS ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A37-14 (IGS) - Body ground Engine switch on (IG) 11 to 14 V
      A37-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A37-22 (E1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (AFS ECU - HEADLIGHT)

    A01GKKFE06

    1. Disconnect the A37 AFS ECU connector.

    2. Disconnect the B1*1 or B11*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
      A37-1 (SMBL) - B1-13 (LHB1) Always Below 1 Ω
      A37-27 (LH-) - B1-22 (LH E) Always Below 1 Ω
      A37-30 (LH+) - B1-14 (LHM+) Always Below 1 Ω
      A37-1 (SMBL) - Body ground Always 10 kΩ or higher
      A37-27 (LH-) - Body ground Always 10 kΩ or higher
      A37-30 (LH+) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      A37-2 (SMBR) - B11-13 (RHB1) Always Below 1 Ω
      A37-28 (RH-) - B11-22 (RH E) Always Below 1 Ω
      A37-11 (RH+) - B11-14 (RHM+) Always Below 1 Ω
      A37-2 (SMBR) - Body ground Always 10 kΩ or higher
      A37-28 (RH-) - Body ground Always 10 kΩ or higher
      A37-11 (RH+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT HEADLIGHT ASSEMBLY

    A01GJTGE07

    1. for HID Headlight


      1. Remove the headlight Click here.

    2. for LED Headlight


      1. Remove the headlight Click here.

    3. for HID Headlight


      1. Disconnect the headlight swivel motor (leveling portion) connector Click here.

    4. for LED Headlight


      1. Disconnect the headlight swivel motor (leveling portion) connector Click here.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      13 (LHB1) - 1 Always Below 1 Ω
      14 (LHM+) - 4 Always Below 1 Ω
      22 (LH E) - 3 Always Below 1 Ω
      for RH
      Tester Connection Condition Specified Condition
      13 (RHB1) - 1 Always Below 1 Ω
      14 (RHM+) - 4 Always Below 1 Ω
      22 (RH E) - 3 Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for HID Headlight) B
      NG (for LED Headlight) C

    B

    REPLACE HEADLIGHT ASSEMBLY Click here

    C

    REPLACE HEADLIGHT ASSEMBLY Click here

    A

  5. CHECK HEADLIGHT SWIVEL MOTOR (LEVELING PORTION)


    1. for HID Headlight


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

    2. for LED Headlight


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

    3. Check for DTC Click here.

      OK
      DTC B2424 or B2425 output does not occur

    NG

    REPLACE AFS ECU Click here

    OK

    END (HEADLIGHT SWIVEL MOTOR [LEVELING MOTOR] WAS DEFECTIVE)