LIGHTING SYSTEM, Diagnostic DTC:B2412, B2413

DTC Code DTC Name
B2412 Headlight Swivel Motor LH Malfunction
B2413 Headlight Swivel Motor RH Malfunction

DESCRIPTION

Each swivel motor receives a signal from the AFS ECU to operate and sends a signal indicating the direction of the headlight and condition of the headlight swivel motor to the AFS ECU.

DTC No. DTC Detection Condition Trouble Area
B2412

  • Malfunction in headlight swivel motor LH

  • Open or short in headlight swivel motor LH circuit

  • Headlight swivel motor LH

  • Harness or connector

  • AFS ECU
B2413

  • Malfunction in headlight swivel motor RH

  • Open or short in headlight swivel motor RH circuit

  • Headlight swivel motor RH

  • Harness or connector

  • AFS ECU

WIRING DIAGRAM

A01CF3EE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for the DTCs Click here.

      OK
      DTC B2412 or B2413 is not output.

    NG

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / AFS / Active Test.

    5. Check the operation.

      AFS
      Tester Display Test Part Control Range Diagnostic Note
      Drive Swivel Motor RH RIGHT Swivel motor RH right direction rotation RIGHT/OFF -
      Drive Swivel Motor RH LEFT Swivel motor RH left direction rotation LEFT/OFF -
      Drive Swivel Motor LH RIGHT Swivel motor LH right direction rotation RIGHT/OFF -
      Drive Swivel Motor LH LEFT Swivel motor LH left direction rotation LEFT/OFF -
      OK
      Swivel motors operate normally.

    NG

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

    OK

  3. REPLACE HEADLIGHT SWIVEL MOTOR (HEADLIGHT REFLECTOR)


    1. Temporarily replace the headlight swivel motor (headlight reflector) with a new or normally functioning one Click here for ALPHARD, Click here for VELLFIRE) ).

    2. Check for DTCs Click here.

      OK
      DTC B2412 or B2413 is not output.

    NG

    REPLACE AFS ECU Click here

    OK

    END

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


    1. A01CGHRE01

      Disconnect the A23 AFS ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A23-14 (IGS) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01CGHRE02

      Disconnect the A23 AFS ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A23-22 (E1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01CD2GE01

      Disconnect the A23 AFS ECU connector.

    2. Disconnect the B1 or B10 headlight assembly connector.

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

      Standard Resistance
      LH Side (B2412)
      Tester Connection Condition Specified Condition
      A23-1 (SMBL) - B1-4 (SMBL) Always Below 1 Ω
      A23-29 (SML) - B1-3 (SBLL) Always Below 1 Ω
      A23-23 (SMGL) - B1-8 (SBGL) Always Below 1 Ω
      A23-1 (SMBL) - Body ground Always 10 kΩ or higher
      A23-29 (SML) - Body ground Always 10 kΩ or higher
      A23-23 (SMGL) - Body ground Always 10 kΩ or higher
      RH Side (B2413)
      Tester Connection Condition Specified Condition
      A23-2 (SMBR) - B10-4 (SMBR) Always Below 1 Ω
      A23-10 (SMR) - B10-3 (SBLR) Always Below 1 Ω
      A23-24 (SMGR) - B10-8 (SBGR) Always Below 1 Ω
      A23-2 (SMBR) - Body ground Always 10 kΩ or higher
      A23-10 (SMR) - Body ground Always 10 kΩ or higher
      A23-24 (SMGR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT AFS ECU


    1. A01CCMUE01

      Reconnect the A23 AFS ECU connector.

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

      Standard Voltage
      LH Side (B2412)
      Tester Connection Condition Specified Condition
      A23-1 (SMBL) - A23-23 (SMGL) Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      RH Side (B2413)
      Tester Connection Condition Specified Condition
      A23-2 (SMBR) - A23-24 (SMGR) Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V

    NG

    REPLACE AFS ECU Click here

    OK

  8. INSPECT HEADLIGHT UNIT


    1. A01CD0FE01

      Remove the headlight unit Click here for ALPHARD, Click here for VELLFIRE).

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

      Standard Resistance
      LH Side (B2412)
      Tester Connection Condition Specified Condition
      B1-4 (SMBL) - 3 (IG) Always Below 1 Ω
      B1-3 (SBLL) - 2 (LIN) Always Below 1 Ω
      B1-8 (SBGL) - 1 (GND) Always Below 1 Ω
      B1-4 (SMBL) - Body ground Always 10 kΩ or higher
      B1-3 (SBLL) - Body ground Always 10 kΩ or higher
      B1-8 (SBGL) -Body ground Always 10 kΩ or higher
      RH Side (B2413)
      Tester Connection Condition Specified Condition
      B10-4 (SMBR) - 3 (IG) Always Below 1 Ω
      B10-3 (SBLR) - 2 (LIN) Always Below 1 Ω
      B10-8 (SBGR) - 1 (GND) Always Below 1 Ω
      B10-4 (SMBR) - Body ground Always 10 kΩ or higher
      B10-3 (SBLR) - Body ground Always 10 kΩ or higher
      B10-8 (SBGR) -Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for ALPHARD) B
      NG (for VELLFIRE) C

    B

    REPLACE HEADLIGHT UNIT Click here

    C

    REPLACE HEADLIGHT UNIT Click here

    A

  9. REPLACE HEADLIGHT SWIVEL MOTOR (HEADLIGHT REFLECTOR)


    1. Temporarily replace the headlight swivel motor (headlight reflector) with a new or normally functioning one Click here for ALPHARD, Click here for VELLFIRE) ).

    2. Check for DTCs Click here.

      OK
      DTC B2412 or B2413 is not output.

    NG

    REPLACE AFS ECU Click here

    OK

    END