LIGHTING SYSTEM High Beam Headlight Circuit

DESCRIPTION

The headlight ECU sub-assembly controls the high beam headlights.

WIRING DIAGRAM


  1. without AFS (Adaptive Front-lighting System)

    B002BIXE21

  2. with AFS (Adaptive Front-lighting System)

    B002BIXE22

CAUTION / NOTICE / HINT

Note

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


    1. without AFS (Adaptive Front-lighting System):


      1. Using the GTS, perform the Active Test Click here.

        HL AutoLeveling
        Tester Display Test Part Control Range Diagnostic Note
        Headlight High Beam High beam headlights ON/OFF -
        OK
        High beam headlights illuminate.

    2. with AFS (Adaptive Front-lighting System):


      1. Using the GTS, perform the Active Test Click here.

        AFS
        Tester Display Test Part Control Range Diagnostic Note
        Headlight High Beam High beam headlights ON/OFF -
      Result
      Result Proceed to
      OK A
      NG (for LH Side) B
      NG (for RH Side) C

    A

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY Click here

    C

    INSPECT HEADLIGHT UNIT RH Click here

    B

  2. INSPECT HEADLIGHT UNIT LH


    1. Remove the headlight assembly LH Click here.

      B002BQNE02
      Text in Illustration
      *A without AFS (Adaptive Front-lighting System) *B with AFS (Adaptive Front-lighting System)
      *a

      Component without harness connected

      (to Headlight Unit Assembly LH)

      		 *b

      Component without harness connected

      (to Headlight ECU Sub-assembly LH)

    2. Remove the headlight unit LH Click here.

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

      Standard Resistance
      without AFS (Adaptive Front-lighting System)
      Tester Connection Condition Specified Condition
      B-10 - D-10 Always Below 1 Ω
      B-1 - D-4 Always Below 1 Ω
      with AFS (Adaptive Front-lighting System)
      Tester Connection Condition Specified Condition
      B-10 - D-6 Always Below 1 Ω
      B-1 - D-2 Always Below 1 Ω

    NG

    REPLACE HEADLIGHT UNIT LH Click here

    OK

  3. CHECK HEADLIGHT UNIT ASSEMBLY LH


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

    2. Check that the high beam light LH operate normally.

      OK
      High beam light LH operate normally.

    OK

    END (HEADLIGHT UNIT ASSEMBLY LH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here

  4. INSPECT HEADLIGHT UNIT RH


    1. Remove the headlight assembly RH Click here.

      B002BQNE02
      Text in Illustration
      *A without AFS (Adaptive Front-lighting System) *B with AFS (Adaptive Front-lighting System)
      *a

      Component without harness connected

      (to Headlight Unit Assembly RH)

      		 *b

      Component without harness connected

      (to Headlight ECU Sub-assembly RH)

    2. Remove the headlight unit RH Click here.

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

      Standard Resistance
      without AFS (Adaptive Front-lighting System)
      Tester Connection Condition Specified Condition
      B-10 - D-10 Always Below 1 Ω
      B-1 - D-4 Always Below 1 Ω
      with AFS (Adaptive Front-lighting System)
      Tester Connection Condition Specified Condition
      B-10 - D-6 Always Below 1 Ω
      B-1 - D-2 Always Below 1 Ω

    NG

    REPLACE HEADLIGHT UNIT RH Click here

    OK

  5. CHECK HEADLIGHT UNIT ASSEMBLY RH


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

    2. Check that the high beam light RH operate normally.

      OK
      High beam light RH operate normally.

    OK

    END (HEADLIGHT UNIT ASSEMBLY RH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY Click here