AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM(for Single Beam Headlight) Headlight Beam Level Control Actuator Circuit

DESCRIPTION

The headlight leveling ECU assembly operate the headlight leveling motors according to the vehicle conditions.

WIRING DIAGRAM

B0075RPE05

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      Body Electrical > HL AutoLeveling > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Drive The Leveling Motor Leveling motor upward or downward operation Stop/Down/Up Perform the Active Test with the engine started and vehicle stopped

      Body Electrical > HL AutoLeveling > Active Test
      Tester Display
      Drive The Leveling Motor
      OK
      Headlight leveling motors operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - HEADLIGHT LEVELING ECU ASSEMBLY)


    1. Disconnect the A61 headlight leveling ECU assembly connector.

    2. Disconnect the A30*1 or A1*2 headlight assembly connector.


      • *1: for LH Side

      • *2: for RH Side

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      A61-11 (LH+) - A30-4 (LHIG) Always Below 1 Ω
      A61-18 (LHT) - A30-1 (LH T) Always Below 1 Ω
      A61-24 (LH-) - A30-2 (LH E) Always Below 1 Ω
      A61-11 (LH+) - Body ground Always 10 kΩ or higher
      A61-18 (LHT) - Body ground Always 10 kΩ or higher
      A61-24 (LH-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      A61-10 (RH+) - A1-4 (RHIG) Always Below 1 Ω
      A61-17 (RHT) - A1-1 (RH T) Always Below 1 Ω
      A61-23 (RH-) - A1-2 (RH E) Always Below 1 Ω
      A61-10 (RH+) - Body ground Always 10 kΩ or higher
      A61-17 (RHT) - Body ground Always 10 kΩ or higher
      A61-23 (RH-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HEADLIGHT CORD


    1. Remove the headlight cord.

      Click here

    2. Inspect the headlight cord.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT CORD Click here

    OK

  4. CHECK HEADLIGHT LEVELING MOTOR


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

      Click here

    2. Perform the Active Test according to the display on the GTS.


      Body Electrical > HL AutoLeveling > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Drive The Leveling Motor Leveling motor upward or downward operation Stop/Down/Up Perform the Active Test with the engine started and vehicle stopped.

      Body Electrical > HL AutoLeveling > Active Test
      Tester Display
      Drive The Leveling Motor
      OK
      Headlight leveling motors operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT LEVELING MOTOR WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here