LIGHTING SYSTEM Daytime Running Light Relay Circuit

DESCRIPTION

The front controller controls the daytime running light system using a built-in IC relay.

The system illuminates the high-intensity LED parking lights (high-intensity circuit).

WIRING DIAGRAM

A01626HE05

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 Electrical / Body No.5 / Active Test.

    5. Check that the daytime running lights operate.

      Body No. 5 (Front Controller)
      Tester Display Test Part Control Range Diagnostic Note
      Light Head HI DRL Operation High-intensity LED parking lights ON/OFF -
      OK
      Daytime running lights illuminate. (LED parking lights illuminate on high-intensity (bright) setting.)

    NG

    CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHTS) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHTS)


    1. Disconnect the 2G front controller connector.

    2. Disconnect the B2 and B12 headlight assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B2-24 (B) - 2G-5 Always Below 1 Ω
      B2-24 (B) - Body ground Always 10 kΩ or higher
      B12-24 (B) - 2G-5 Always Below 1 Ω
      B12-24 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE FRONT CONTROLLER (MULTIPLEX NETWORK BODY ECU)


    1. Replace the front controller.

    2. Check the operation of the daytime running light system.

      Tech Tips

      Refer to Operation Check.

      Result
      Result Proceed to
      Daytime running lights illuminate. A
      Daytime running lights do not illuminate. B

    B

    REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

    A

    END