LIGHTING SYSTEM Headlight (HI-BEAM) Circuit

DESCRIPTION

The front controller receives headlight HI switch information from the combination switch, and turns on the headlights.

WIRING DIAGRAM

A016092E01

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Body No. 5 / Active Test.

    5. Check the operation.

      Body No. 5 (Front Controller)
      Tester Display Test Part Control Range Diagnostic Note
      Light Head (High) Headlight (high) ON/OFF -
      OK
      Headlight assembly illuminates.

    NG

    INSPECT FUSE (H-LP UPR) Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT FUSE (H-LP UPR)


    1. Remove the H-LP UPR fuse from the No. 2 engine room relay block.

    2. Measure the resistance of the fuse.

      Standard Resistance
      Below 1 Ω

    NG

    REPLACE FUSE

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BATTERY)


    1. A015Z25E03

      Disconnect the 2E front controller connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2E-2 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BODY GROUND)


    1. A0162YFE16

      Check the wire harness between the headlight LH and front controller, and the headlight LH and body ground.


      1. Disconnect the 2G front controller connector.

      2. Disconnect the B12 headlight LH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2G-13 - B12-2 (HI) Always Below 1 Ω
        2G-13 or B12-2 (HI) - Body ground Always 10 kΩ or higher
        B12-1 (E) - Body ground Always Below 1 Ω
    2. A0162YFE17

      Check the wire harness between the headlight RH and front controller, and the headlight RH and body ground.


      1. Disconnect the 2G front controller connector.

      2. Disconnect the B2 headlight RH connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2G-12 - B2-2 (HI) Always Below 1 Ω
        2G-12 or B2-2 (HI) - Body ground Always 10 kΩ or higher
        B2-1 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT CONTROLLER (MULTIPLEX NETWORK BODY ECU)