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

DESCRIPTION

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

WIRING DIAGRAM

B005A8IE02

CAUTION / NOTICE / HINT

Note


  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this DTC.

    Click here

  • After the headlight 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 Up, Down or Stop Perform with the vehicle stopped, engine switch on (IG) and low beam headlights illuminated.

      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 ASSEMBLY LH Click here

    B

  2. INSPECT HEADLIGHT UNIT ASSEMBLY RH


    1. B0058ZBC03
      *a

      Component without harness connected

      (Headlight Leveling Motor RH)
      *b

      Component without harness connected

      (Headlight ECU Sub-assembly RH)

      Remove the headlight leveling motor RH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E-3 - B-7 Always Below 1 Ω
      E-2 - B-8 Always Below 1 Ω
      E-1- B-17 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    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.

      Click here

    2. 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 Up, Down or Stop Perform with the vehicle stopped, engine switch on (IG) and low beam headlights illuminated.

      Body Electrical > HL AutoLeveling > Active Test
      Tester Display
      Drive The Leveling Motor
      OK
      The Active Test is performed normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT LEVELING MOTOR RH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

  4. INSPECT HEADLIGHT UNIT ASSEMBLY LH


    1. B0058ZBC03
      *a

      Component without harness connected

      (Headlight Leveling Motor LH)
      *b

      Component without harness connected

      (Headlight ECU Sub-assembly LH)

      Remove the headlight leveling motor LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E-3 - B-7 Always Below 1 Ω
      E-2 - B-8 Always Below 1 Ω
      E-1- B-17 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

    OK

  5. CHECK HEADLIGHT LEVELING MOTOR LH


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

      Click here

    2. 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 Up, Down or Stop Perform with the vehicle stopped, engine switch on (IG) and low beam headlights illuminated.

      Body Electrical > HL AutoLeveling > Active Test
      Tester Display
      Drive The Leveling Motor
      OK
      The Active Test is performed normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT LEVELING MOTOR LH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here