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

DTC Code DTC Detection Condition Trouble Area
B2424
  • Malfunction in the headlight swivel motor LH (leveling portion).

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


  • Headlight swivel ECU assembly

  • Headlight unit assembly LH

  • Headlight swivel motor LH (leveling portion)

  • Harness or connector

B2425
  • Malfunction in the headlight swivel motor RH (leveling portion).

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


  • Headlight swivel ECU assembly

  • Headlight unit assembly RH

  • Headlight swivel motor RH (leveling portion)

  • Harness or connector

WIRING DIAGRAM

A01FFEUE02

INSPECTION PROCEDURE

Note


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

  • After replacing the headlight swivel ECU, perform initialization and registration of vehicle information Click here.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT
  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 output does not occur.

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


    1. A01FH7RE43
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Headlight Swivel ECU Assembly)

      Disconnect the headlight swivel ECU connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A7-14 (IGS) - Body ground Engine switch on (IG) 11 to 14 V
      A7-15 (IG) - Body ground
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A7-22 (E1) - Body ground Always Below 1 Ω

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


    1. Disconnect the A7 headlight swivel ECU connector.

    2. Disconnect the B5*1 or B2*2 headlight unit 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
      A7-1 (SMBL) - B5-12 (SMBL)*1 Always Below 1 Ω
      A7-3 (LHT) - B5-11 (LHB1)*2 Always Below 1 Ω
      A7-30 (LH+) - B5-10 (LHM+) Always Below 1 Ω
      A7-23 (SMGL) - B5-2 (LH E) Always Below 1 Ω
      A7-1 (SMBL) - Body ground*1 Always 10 kΩ or higher
      A7-3 (LHT) - Body ground*2 Always 10 kΩ or higher
      A7-30 (LH+) - Body ground Always 10 kΩ or higher
      A7-23 (SMGL) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      A7-2 (SMBR) - B2-12 (SMBR)*1 Always Below 1 Ω
      A7-4 (RHT) - B2-11 (RHB1)*2 Always Below 1 Ω
      A7-11 (RH+) - B2-10 (RHM+) Always Below 1 Ω
      A7-24 (SMGR) - B2-2 (RH E) Always Below 1 Ω
      A7-2 (SMBR) - Body ground*1 Always 10 kΩ or higher
      A7-4 (RHT) - Body ground*2 Always 10 kΩ or higher
      A7-11 (RH+) - Body ground Always 10 kΩ or higher
      A7-24 (SMGR) - Body ground Always 10 kΩ or higher

      • *1: w/ AFS

      • *2: w/o AFS


    NG
    OK
  5. INSPECT HEADLIGHT UNIT ASSEMBLY


    1. Remove the headlight unit Click here.

      A01FI48E06
      Text in Illustration
      *A w/ AFS *B w/o AFS
      *a

      Front view of wire harness connector

      (to Headlight Swivel Motor)

      *b

      Component without harness connected

      (Headlight Unit Assembly)

    2. Remove the headlight lens Click here.

    3. Disconnect the headlight swivel motor connector.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      12 (SMBL) - 1*1 Always Below 1 Ω
      11 (LHB1) - 1*2
      10 (LHM+) - 4
      2 (LH E) - 3
      for RH
      Tester Connection Condition Specified Condition
      12 (SMBR) - 1*1 Always Below 1 Ω
      11 (RHB1) - 1*2
      10 (RHM+) - 4
      2 (RH E) - 3

      • *1: w/ AFS

      • *2: w/o AFS


    NG
    OK
  6. CHECK HEADLIGHT SWIVEL MOTOR (LEVELING PORTION)


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

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 output does not occur.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B
    C
    A