AFS (ADAPTIVE FRONT-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 (headlight swivel ECU assembly) receives a signal from each headlight leveling motor using LIN communication.

DTC No. DTC Detection Condition Trouble Area
B2424

  • Malfunction in headlight leveling motor LH

  • Open or short in headlight leveling motor LH communication circuit

  • Headlight leveling motor LH

  • Harness or connector

  • AFS ECU (headlight swivel ECU assembly)
B2425

  • Malfunction in headlight leveling motor RH

  • Open or short in headlight leveling motor RH communication circuit

  • Headlight leveling motor RH

  • Harness or connector

  • AFS ECU (headlight swivel ECU assembly)

WIRING DIAGRAM

B000JCME01

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 DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 is not output.

    NG

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

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK HARNESS AND CONNECTOR (BATTERY - AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY))


    1. B000IQ7E41
      Text in Illustration
      *a

      Front view of wire harness connector

      (to AFS ECU (Headlight Swivel ECU Assembly))

      Disconnect the A35 AFS ECU (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
      A35-15 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B000IQ7E40
      Text in Illustration
      *a

      Front view of wire harness connector

      (to AFS ECU (Headlight Swivel ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A35-22 (E1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) - HEADLIGHT LEVELING MOTOR)


    1. Disconnect the LH side or RH side headlight leveling motor connector.

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

      Standard Resistance
      LH Side (B2424)
      Tester Connection Condition Specified Condition
      A35-3 (LH+) - A19-1 (LHB1) Always Below 1 Ω
      A35-27 (LH-) - A19-3 (LHE) Always Below 1 Ω
      A35-30 (LHE) - A19-2 (LHM+) Always Below 1 Ω
      A35-3 (LH+) - Body ground Always 10 kΩ or higher
      A35-27 (LH-) - Body ground Always 10 kΩ or higher
      A35-30 (LHE) - Body ground Always 10 kΩ or higher
      RH Side (B2425)
      Tester Connection Condition Specified Condition
      A35-4 (RH+) - A61-1 (RHB1) Always Below 1 Ω
      A35-28 (RH-) - A61-3 (RHE) Always Below 1 Ω
      A35-11 (RHE) - A61-2 (RHM+) Always Below 1 Ω
      A35-4 (RH+) - Body ground Always 10 kΩ or higher
      A35-28 (RH-) - Body ground Always 10 kΩ or higher
      A35-11 (RHE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)


    1. B000KBQE11
      Text in Illustration
      *a

      Component with harness connected

      (AFS ECU (Headlight Swivel ECU Assembly))

      Reconnect the A35 AFS ECU (headlight swivel ECU assembly) connector.

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

      Standard Voltage
      LH Side (B2424)
      Tester Connection Condition Specified Condition
      A35-3 (LH+) - A35-27 (LH-) Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      RH Side (B2425)
      Tester Connection Condition Specified Condition
      A35-4 (RH+) - A35-28 (RH-) Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V

    NG

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Click here

    OK

  6. CHECK HEADLIGHT LEVELING MOTOR


    1. Replace the headlight leveling motor with a new or a known good one Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2424 or B2425 is not output.

    NG

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Click here

    OK

    END (HEADLIGHT LEVELING MOTOR WAS DEFECTIVE)