AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM(except Sedan), Diagnostic DTC:B2417 and B2418

DTC Code DTC Name
B2417 Headlight Beam Level Control Motor LH Malfunction
B2418 Headlight Beam Level Control Motor RH Malfunction

DESCRIPTION

Each swivel motor receives operation signals from the headlight swivel ECU assembly and sends signals indicating the direction of the headlight and condition of the headlight leveling motor to the headlight swivel ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2417

Headlight Beam Level Control Motor LH Malfunction

  • Malfunction in headlight leveling motor LH

  • Open or short in headlight leveling motor LH circuit

  • Headlight unit LH (Headlight leveling motor LH)

  • Harness or connector

  • Headlight swivel ECU assembly

B2418

Headlight Beam Level Control Motor RH Malfunction

  • Malfunction in headlight leveling motor RH

  • Open or short in headlight leveling motor RH circuit

  • Headlight unit RH (Headlight leveling motor RH)

  • Harness or connector

  • Headlight swivel ECU assembly

WIRING DIAGRAM

E314491E07

CAUTION / NOTICE / HINT

Note:

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

  • If the headlight swivel ECU assembly has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight swivel ECU assembly.

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PROCEDURE

  1. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > AFS > Clear DTCs

    2. Check for DTCs.

      Click here

      Body Electrical > AFS > Trouble Codes

    Result

    Result

    Proceed to

    DTC B2417 and B2418 are not output

    A

    Both DTC B2417 and B2418 are output

    B

    DTC B2417 or B2418 is output

    C
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick hereClick here

    C

    CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - HEADLIGHT ASSEMBLY)Click here

    B

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE - HEADLIGHT SWIVEL ECU ASSEMBLY)

    1. Disconnect the A93 headlight swivel ECU assembly connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A93-14 (IGS) - Body ground

      Ignition switch off

      Below 1 V

      A93-14 (IGS) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY

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    NG

    GO TO ECU Power Source Circuit

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  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - HEADLIGHT ASSEMBLY)

    1. Disconnect the A93 headlight swivel ECU assembly connector.

    2. Disconnect the A163 headlight assembly LH connector or A162 headlight assembly RH connector.

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

      Standard Resistance

      Table 1. LH Side (DTC B2417)

      Tester Connection

      Condition

      Specified Condition

      A93-1 (SMBL) - A163-4 (LHB1)

      Always

      Below 1 Ω

      A93-27 (LL1-) - A163-2 (LH E)

      Always

      Below 1 Ω

      A93-1 (SMBL) - Body ground

      Always

      10 kΩ or higher

      A93-27 (LL1-) - Body ground

      Always

      10 kΩ or higher
      Table 2. RH Side (DTC B2418)

      Tester Connection

      Condition

      Specified Condition

      A93-2 (SMBR) - A162-4 (RHB1)

      Always

      Below 1 Ω

      A93-28 (LR1-) - A162-2 (RH E)

      Always

      Below 1 Ω

      A93-2 (SMBR) - Body ground

      Always

      10 kΩ or higher

      A93-28 (LR1-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE HEADLIGHT UNIT (HEADLIGHT LEVELING MOTOR)

    1. Replace the headlight unit (headlight leveling motor) with a new or known good one.

      Click here

    2. Check for DTCs.

      Click here

      Body Electrical > AFS > Trouble Codes

      OK

      DTC B2417 and B2418 are not output.

    Result

    Proceed to

    OK

    NG
    OK

    END (HEADLIGHT UNIT (HEADLIGHT LEVELING MOTOR) WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY

    Click hereClick here