LIGHTING SYSTEM Clearance Light Circuit

DESCRIPTION

When the light control switch is in the tail or head position, the main body ECU (multiplex network body ECU) sends an illumination request signal to the No. 1 headlight ECU sub-assembly LH to illuminate the clearance lights.

WIRING DIAGRAM

A003M3XE09

CAUTION / NOTICE / HINT

Note

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

Click here

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL AutoLeveling*1 or AHS*2 / Active Test.


      • *1: w/o Adaptive High Beam System

      • *2: w/ Adaptive High Beam System

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


      1. w/o Adaptive High Beam System


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

        Body Electrical > HL AutoLeveling > Active Test
        Tester Display
        Clearance Light

      2. w/ Adaptive High Beam System


        Body Electrical > AHS > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Clearance Light Clearance lights OFF or ON -

        Body Electrical > AHS > Active Test
        Tester Display
        Clearance Light
      OK
      Clearance lights illuminate.
      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

    INSPECT HEADLIGHT UNIT ASSEMBLY RH Click here

    B

  2. INSPECT HEADLIGHT UNIT ASSEMBLY LH

    A003MX4C08
    *a

    Component without harness connected

    (to No. 1 Headlight ECU Sub-assembly LH)

    		 *b

    Component without harness connected

    (to Headlight Unit LH)

    1. Remove the headlight assembly LH.

      Click here

    2. Remove the headlight unit LH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-19 (CLL+) - D-8 Always Below 1 Ω
      B-2 (CLL-) - D-9 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

    OK

  3. INSPECT HEADLIGHT UNIT LH


    1. Inspect the headlight unit LH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE HEADLIGHT UNIT LH Click here

  4. INSPECT HEADLIGHT UNIT ASSEMBLY RH

    A003MX4C08
    *a

    Component without harness connected

    (to No. 1 Headlight ECU Sub-assembly RH)

    		 *b

    Component without harness connected

    (to Headlight Unit RH)

    1. Remove the headlight assembly RH.

      Click here

    2. Remove the headlight unit RH.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B-19 (CLL+) - D-8 Always Below 1 Ω
      B-2 (CLL-) - D-9 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

    OK

  5. INSPECT HEADLIGHT UNIT RH


    1. Inspect the headlight unit RH.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE HEADLIGHT UNIT RH Click here