LIGHTING SYSTEM Cornering Light Circuit

DESCRIPTION

The illumination of the cornering light is controlled by the headlight light control ECU sub-assembly.

WIRING DIAGRAM


  1. A01UEJVE02

CAUTION / NOTICE / HINT

Note


  • The light system (exterior) uses the CAN communication system and multiplex communication system (LIN). First perform the communication function checks in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting.

    Click here

  • After the headlight light control ECU sub-assembly LH (main) is replaced, vehicle information registration and initialization are necessary.

    Click here

  • Check that meter / gauge system DTCs B1507 and B1508 are not output.

    Click here

  • Check the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (CORNERING LIGHT)


    1. Using the GTS, perform the Active Test.

      Click here


      Body Electrical > HL AutoLeveling > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Cornering Light Illuminates cornering lights ON or OFF -

      Body Electrical > HL AutoLeveling > Active Test
      Tester Display
      Cornering Light
      OK
      Cornering lights illuminate.
      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

    CHECK CORNERING LIGHT UNIT ASSEMBLY LH Click here

    B

  2. CHECK CORNERING LIGHT UNIT ASSEMBLY RH


    1. Temporarily replace the cornering light unit assembly RH with a new or normally functioning one.

      for ALPHARD:

      Click here

      for VELLFIRE:

      Click here

    2. Check that the operation of the lighting system returns to normal.

      Result
      Proceed to
      OK
      NG

    OK

    END (CORNERING LIGHT UNIT ASSEMBLY RH WAS DEFECTIVE)

    NG

  3. CHECK HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH (SUB)


    1. Temporarily replace the headlight light control ECU sub-assembly RH (sub) with a new or normally functioning one.

      Click here

    2. Check that the operation of the lighting system returns to normal.

      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH [SUB] WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY LH (MAIN) Click here

  4. CHECK CORNERING LIGHT UNIT ASSEMBLY LH


    1. Temporarily replace the cornering light unit assembly LH with a new or normally functioning one.

      for ALPHARD:

      Click here

      for VELLFIRE:

      Click here

    2. Check that the operation of the lighting system returns to normal.

      Result
      Proceed to
      OK
      NG

    OK

    END (CORNERING LIGHT UNIT ASSEMBLY LH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY LH [MAIN] Click here