AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM, Diagnostic DTC:B2424, B2425

DTC Code DTC Name
B2424 Headlight Beam Level Control Motor LH Lost Communication
B2425 Headlight Beam Level Control Motor RH Lost Communication

DESCRIPTION

The No. 1 headlight ECU sub-assembly receives a signal from each headlight leveling motor using LIN communication. The No. 1 headlight ECU sub-assembly LH stores DTC B2424 and B2425.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2424 Headlight Beam Level Control Motor LH Lost Communication

  • Malfunction in headlight leveling motor LH

  • Open or short in headlight leveling motor LH communication circuit

  • Headlight unit LH

  • Headlight unit assembly LH

  • No. 1 headlight ECU sub-assembly LH

 w/ Adaptive High Beam System
B2425 Headlight Beam Level Control Motor RH Lost Communication

  • Malfunction in headlight leveling motor RH

  • Open or short in headlight leveling motor RH communication circuit

  • Headlight unit RH

  • Headlight unit assembly RH

  • No. 1 headlight ECU sub-assembly RH

  • No. 1 headlight ECU sub-assembly LH

  • Harness or connector

 w/ Adaptive High Beam System

WIRING DIAGRAM

A003LOSE34

CAUTION / NOTICE / HINT

Note

If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.

Click here

PROCEDURE


  1. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Clear the DTCs.


      Body Electrical > AHS > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > AHS > Trouble Codes
      OK
      DTC B2424 and B2425 are not output.

      Tech Tips

      f DTC B2417 or B2418 is output simultaneously with DTC B2424 or B2425, perform troubleshooting for DTC B2417 or B2418 first.

      Result
      Result Proceed to
      OK A
      NG (DTC B2424 and B2417 are output) B
      NG (DTC B2425 and B2418 are output) C
      NG (DTC B2424 is output) D
      NG (DTC B2425 is output) E

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO DTC B2417 Click here

    C

    GO TO DTC B2418 Click here

    E

    CHECK HARNESS AND CONNECTOR (NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH) Click here

    D

  3. INSPECT HEADLIGHT UNIT ASSEMBLY LH

    A003M5IC06
    *a

    Component without harness connected

    (to No. 1 Headlight ECU Sub-assembly LH)

    		 *b

    Component without harness connected

    (to Headlight Unit LH)

    1. Remove the headlight assembly LH.

      Click here

    2. Remove the headlight unit LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C-13 (LINLI) - D-11 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

    OK

  4. REPLACE HEADLIGHT UNIT LH


    1. Replace the headlight unit LH with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Clear the DTCs.


      Body Electrical > AHS > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > AHS > Trouble Codes
      OK
      DTC B2424 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT UNIT LH WAS DEFECTIVE)

    NG

    REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH Click here

  7. CHECK HARNESS AND CONNECTOR (NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH)


    1. Disconnect the A15 No. 1 headlight ECU sub-assembly LH connector.

    2. Disconnect the A16 No. 1 headlight ECU sub-assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A15-20 (LINL) - A16-20 (LINL) Always Below 1 Ω
      A15-20 (LINL) or A16-20 (LINL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT HEADLIGHT UNIT ASSEMBLY RH

    A003M5IC06
    *a

    Component without harness connected

    (to No. 1 Headlight ECU Sub-assembly RH)

    		 *b

    Component without harness connected

    (to Headlight Unit RH)

    1. Remove the headlight assembly RH.

      Click here

    2. Remove the headlight unit RH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C-13 (LINLI) - D-11 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

    OK

  9. REPLACE HEADLIGHT UNIT RH


    1. Replace the headlight unit RH with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Clear the DTCs.


      Body Electrical > AHS > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  11. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > AHS > Trouble Codes
      OK
      DTC B2425 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT UNIT RH WAS DEFECTIVE)

    NG

  12. REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH


    1. Replace the No. 1 headlight ECU sub-assembly RH with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  13. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Clear the DTCs.


      Body Electrical > AHS > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  14. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AHS / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > AHS > Trouble Codes
      OK
      DTC B2425 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH WAS DEFECTIVE)

    NG

    REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH Click here