AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM Headlight Beam Level Control Actuator Circuit

DESCRIPTION

The headlight light control ECU sub-assembly controls the headlight leveling motor.

WIRING DIAGRAM

A01CNAHC01

CAUTION / NOTICE / HINT

Note

After the headlight light control ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.

Click here

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (LEVELING MOTOR)


    1. Using the GTS, perform the Active Test.

      Click here


      Body Electrical > HL AutoLeveling > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Drive The Leveling Motor Operates the headlight leveling motor (Perform with the vehicle stopped, power switch on (READY) and low beam headlights illuminated) Up, Down or Stop -

      Body Electrical > HL AutoLeveling > Active Test
      Tester Display
      Drive The Leveling Motor
      Result
      Result Proceed to
      The Active Test is performed normally A
      The Active Test is not performed normally for the right side light only B
      The Active Test is not performed normally for the left side light only C

    A

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

    C

    INSPECT HEADLIGHT UNIT LH Click here

    B

  2. INSPECT HEADLIGHT UNIT RH


    1. A01CQWIE02

      Remove the headlight assembly RH.

    2. Remove the headlight leveling motor RH and headlight light control ECU sub-assembly RH from the headlight assembly RH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-1 - B-17 Always Below 1 Ω
      A-2 - B-8 Always Below 1 Ω
      A-3 - B-20 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG (for Halogen Headlight and LED Headlight Type)
      NG (for LED Headlight Type)

    NG (for Halogen Headlight and LED Headlight Type)

    REPLACE HEADLIGHT UNIT RH Click here

    NG (for LED Headlight Type)

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

    OK

  3. CHECK HEADLIGHT LEVELING MOTOR RH


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

      for Halogen Headlight and LED Headlight:

      Click here

      for LED Headlight:

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT LEVELING MOTOR RH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH Click here

  4. INSPECT HEADLIGHT UNIT LH


    1. A01CQWIE02

      Remove the headlight assembly LH.

    2. Remove the headlight leveling motor LH and headlight light control ECU sub-assembly LH from the headlight assembly LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-1 - B-17 Always Below 1 Ω
      A-2 - B-8 Always Below 1 Ω
      A-3 - B-20 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG (for Halogen Headlight and LED Headlight Type)
      NG (for LED Headlight Type)

    NG (for Halogen Headlight and LED Headlight Type)

    REPLACE HEADLIGHT UNIT LH Click here

    NG (for LED Headlight Type)

    REPLACE HEADLIGHT UNIT LH Click here

    OK

  5. CHECK HEADLIGHT LEVELING MOTOR LH


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

      for Halogen Headlight and LED Headlight:

      Click here

      for LED Headlight:

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT LEVELING MOTOR LH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY LH Click here