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LIGHTING SYSTEM High Beam Headlight Circuit

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DTC Code DTC Name
  High Beam Headlight Circuit
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DESCRIPTION

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

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WIRING DIAGRAM

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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.

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PROCEDURE


  1. Click here

    CHECK LIGHTS


    1. Check the illumination of each high beam lights.

      Result
      Result Proceed to
      LH side high beam light does not illuminate. A
      RH side high beam light does not illuminate. B

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    PERFORM ACTIVE TEST USING GTS


    1. Using the GTS, perform the Active Test.

      Click here


      1. Body Electrical > AFS > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Headlight High Beam High beam headlights OFF or ON -



      1. Body Electrical > AFS > Active Test
        Tester Display
        Headlight High Beam




      OK
      High beam headlights turns on.
      Result
      Proceed to
      OK
      NG

  3. Click here

    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 high beam light LH operate normally.

      Click here

      Result
      Result Proceed to
      LH side high beam light does not illuminate. A
      RH side high beam light does not illuminate. B

  4. Click here

    CHECK HEADLIGHT ECU SUB-ASSEMBLY LH


    1. B004WVGC01
      *a

      Component without harness connected

      (Headlight Unit LH)

      Remove the headlight unit LH.

      Click here

    2. Reconnect the except headlight unit LH connectors.

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

      Standard Voltage
      Tester Connection Wiring Color Switch Condition Specified Condition
      F-3 - F-4 BR - B-W High beam headlights illuminated 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE HEADLIGHT UNIT LHClick here

    • NG

      REPLACE HEADLIGHT HOUSING SUB-ASSEMBLY LH (WIRE HARNESS AND HEADLIGHT UNIT INTERIOR CIRCUIT BOARD)Click here

  5. Click here

    PERFORM ACTIVE TEST USING GTS


    1. Using the GTS, perform the Active Test.

      Click here


      1. Body Electrical > AFS (Sub) > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Headlight High Beam High beam headlights OFF or ON -



      1. Body Electrical > AFS (Sub) > Active Test
        Tester Display
        Headlight High Beam




      OK
      High beam headlights turns on.
      Result
      Proceed to
      OK
      NG

  6. Click here

    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 high beam light RH operate normally.

      Click here

      Result
      Result Proceed to
      RH side high beam light does not illuminate. A
      LH side high beam light does not illuminate. B

  7. Click here

    CHECK HEADLIGHT ECU SUB-ASSEMBLY RH


    1. B004WVGC01
      *a

      Component without harness connected

      (Headlight Unit RH)

      Remove the headlight unit RH.

      Click here

    2. Reconnect the except headlight unit RH connectors.

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

      Standard Voltage
      Tester Connection Wiring Color Switch Condition Specified Condition
      F-3 - F-4 BR - B-W High beam headlights illuminated 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE HEADLIGHT UNIT RHClick here

    • NG

      REPLACE HEADLIGHT HOUSING SUB-ASSEMBLY RH (WIRE HARNESS AND HEADLIGHT UNIT INTERIOR CIRCUIT BOARD)Click here