LIGHTING SYSTEM High Beam Headlight Circuit

DESCRIPTION

The illumination of the high beam headlights is controlled by the headlight control computer assembly.

WIRING DIAGRAM

B002CM3E03

CAUTION / NOTICE / HINT

Note


  • Inspect the bulbs for circuits related to this system before performing the following inspection procedure.

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

    Click here

  • 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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (HEAD LIGHT HI)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

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


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

      Body Electrical > AFS > Active Test
      Tester Display
      Headlight High Beam
      Result
      Result Proceed to
      OK A
      NG (for LH Side) (w/o Canister Pump Module) B
      NG (for RH Side) (w/o Canister Pump Module) C
      NG (for LH Side) (w/ Canister Pump Module) D
      NG (for RH Side) (w/ Canister Pump Module) E

    A

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

    C

    INSPECT HEADLAMP UNIT RH Click here

    D

    REPLACE HEADLIGHT UNIT LH Click here

    E

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

    B

  2. INSPECT HEADLIGHT UNIT LH


    1. Remove the headlight assembly LH.

      Click here

    2. Remove the headlight unit assembly LH from the headlight assembly LH.

      Click here

    3. B002C72C07
      *a

      Front view of wire harness connector

      (to Headlight Unit Assembly LH)
      *b

      Front view of wire harness connector

      (to Headlight Control Computer Assembly LH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-10 - D-6 Always Below 1 Ω
      B-1 - D-2 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT UNIT LH Click here

    OK

  3. REPLACE HEADLIGHT UNIT ASSEMBLY LH


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

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

      OK
      High beam light LH operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT UNIT ASSEMBLY LH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT CONTROL COMPUTER ASSEMBLY LH Click here

  4. INSPECT HEADLAMP UNIT RH


    1. Remove the headlight assembly RH.

      Click here

    2. Remove the headlight unit assembly RH from the headlight assembly RH.

      Click here

    3. B002C72C07
      *a

      Front view of wire harness connector

      (to Headlight Unit Assembly RH)
      *b

      Front view of wire harness connector

      (to Headlight Light Control ECU Sub-assembly RH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-10 - D-6 Always Below 1 Ω
      B-1 - D-2 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT UNIT RH Click here

    OK

  5. REPLACE HEADLIGHT UNIT ASSEMBLY RH


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

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

      OK
      High beam light RH operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT UNIT ASSEMBLY RH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT CONTROL COMPUTER ASSEMBLY RH Click here

  6. REPLACE HEADLIGHT UNIT LH


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

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

      OK
      High beam light LH operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT UNIT LH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT CONTROL COMPUTER ASSEMBLY LH Click here

  7. REPLACE HEADLIGHT UNIT ASSEMBLY RH


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

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

      OK
      High beam light RH operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (HEADLIGHT UNIT RH WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT CONTROL COMPUTER ASSEMBLY RH Click here