LIGHTING SYSTEM Headlight Beam Level Control Actuator Circuit

DESCRIPTION

The No. 1 headlight ECU sub-assembly controls the headlight leveling motors.

WIRING DIAGRAM

B004C9XE01

CAUTION / NOTICE / HINT

Note

If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information.

Click here

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


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

      Click here


      Body Electrical > HL AutoLeveling > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Drive The Leveling Motor Headlight leveling motor OFF or ON Perform the Active Test with the power switch on (READY) and vehicle stopped.

      Body Electrical > HL AutoLeveling > Active Test
      Tester Display
      Drive The Leveling Motor
      OK
      Headlight leveling motors operate normally.
      Result
      Result Proceed to
      OK A
      NG (for LH Side) B
      NG (for RH Side) C

    A

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

    C

    CHECK HEADLIGHT UNIT ASSEMBLY RH Click here

    B

  2. CHECK HEADLIGHT UNIT ASSEMBLY LH


    1. Interchange the headlight unit assembly LH with RH and connect the connectors to them.

      Click here

    2. Check that the headlight leveling motor LH operate normally.

      Click here

      OK
      Headlight leveling motor LH operate normally.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    OK

  3. CHECK HEADLIGHT UNIT ASSEMBLY LH


    1. B004B6QC02
      *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. Remove the headlight ECU sub-assembly LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - B-9 (ACTBI) Always Below 1 Ω
      2 - B-8 (ACTSI) Always Below 1 Ω
      1 - B-17 (ACTGI) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT LEVELING MOTOR LH Click here

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

  4. CHECK HEADLIGHT UNIT ASSEMBLY RH


    1. Interchange the headlight unit assembly RH with LH and connect the connectors to them.

      Click here

    2. Check that the headlight leveling motor RH operate normally.

      Click here

      OK
      Headlight leveling motor RH operate normally.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH Click here

    OK

  5. CHECK HEADLIGHT UNIT ASSEMBLY RH


    1. B004B6QC02
      *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. Remove the headlight ECU sub-assembly RH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - B-9 (ACTBI) Always Below 1 Ω
      2 - B-8 (ACTSI) Always Below 1 Ω
      1 - B-17 (ACTGI) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT LEVELING MOTOR RH Click here

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here