LIGHTING SYSTEM Daytime Running Light Relay Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) controls the daytime running lights.

WIRING DIAGRAM

A01EIOUE01

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Check that the relay operates.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Daytime Running Light Daytime running light relay ON/OFF -
      OK
      Relay operates. (Daytime running lights illuminate.)

    NG

    INSPECT POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY) Click here

    OK

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

  2. INSPECT POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY)


    1. A01EJFHE07
      Text in Illustration
      *1

      Component without harness connected

      (Power Distributor (Engine Room Junction Block Assembly))

      Remove the power distributor (engine room junction block assembly) from the engine room relay block Click here.

    2. Connect a positive (+) lead from the battery to terminal 1A-1.

    3. Connect a negative (-) lead from the battery to terminal 1F-15.

    4. Check for pulses according to the value(s) in the table below.

      Standard
      Tester Connection Condition Specified Condition
      1D-3 - Battery negative Always Pulse generation
      1D-4 - Battery negative Always Pulse generation

    NG

    REPLACE POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - MAIN BODY ECU)


    1. A01ELI8E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Distributor (Engine Room Junction Block Assembly))
      *2

      Front view of wire harness connector

      (to Main Body ECU (Driver Side Junction Block Assembly))

      Disconnect the 1F power distributor (engine room junction block assembly) connector.

    2. Disconnect the D51 main body ECU (driver side junction block assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1F-15 - D51-10 (DRL) Always Below 1 Ω
      D51-10 (DRL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here