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

DESCRIPTION

The headlight ECU sub-assembly operates the headlight leveling motors according to the vehicle conditions.

WIRING DIAGRAM

B002B8ZE03

CAUTION / NOTICE / HINT

Tech Tips

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH Click here.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (DRIVE THE SWIVEL MOTOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

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

      AFS
      Tester Display Test Part Control Range Diagnostic Note
      Drive The Leveling Motor Leveling motor upward or downward operation Stop/Down/Up Perform the Active Test with the power switch is on (READY) and vehicle stopped
      OK
      Headlight leveling motors operate normally.
      Result
      Result Proceed to
      OK A
      NG (The Active Test is not performed normally for the left side light only) B
      NG (The Active Test is not performed normally for the right side light only) C

    A

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

    C

    INSPECT HEADLIGHT UNIT RH Click here

    B

  2. INSPECT HEADLIGHT UNIT LH


    1. Remove the headlight assembly LH Click here.

    2. B002BGOE02
      Text in Illustration
      *a

      Component without harness connected

      (to Headlight Leveling Motor LH)
      *b

      Component without harness connected

      (to Headlight ECU Sub-assembly LH)

      Remove the headlight unit LH Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-7 - P-1 Always Below 1 Ω
      B-8 - P-4 Always Below 1 Ω
      B-17 - P-3 Always Below 1 Ω

    NG

    REPLACE HEADLIGHT UNIT LH Click here

    OK

  3. CHECK HEADLIGHT LEVELING MOTOR LH


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

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / AFS / Active Test.

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

      AFS
      Tester Display Test Part Control Range Diagnostic Note
      Drive The Leveling Motor Leveling motor upward or downward operation Stop/Down/Up Perform the Active Test with the power switch is on (READY) and vehicle stopped
      OK
      Headlight leveling motors operate normally.

    OK

    END (HEADLIGHT LEVELING MOTOR LH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

  4. INSPECT HEADLIGHT UNIT RH


    1. Remove the headlight assembly RH Click here.

    2. B002BGOE02
      Text in Illustration
      *a

      Component without harness connected

      (to Headlight Leveling Motor RH)
      *b

      Component without harness connected

      (to Headlight ECU Sub-assembly RH)

      Remove the headlight unit RH Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-7 - P-1 Always Below 1 Ω
      B-8 - P-4 Always Below 1 Ω
      B-17 - P-3 Always Below 1 Ω

    NG

    REPLACE HEADLIGHT UNIT RH Click here

    OK

  5. CHECK HEADLIGHT LEVELING MOTOR RH


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

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / AFS / Active Test.

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

      AFS
      Tester Display Test Part Control Range Diagnostic Note
      Drive The Leveling Motor Leveling motor upward or downward operation Stop/Down/Up Perform the Active Test with the power switch is on (READY) and vehicle stopped
      OK
      Headlight leveling motors operate normally.

    OK

    END (HEADLIGHT LEVELING MOTOR RH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here