LIGHTING SYSTEM(for Halogen Headlight) Daytime Running Light Relay Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the daytime running lights.

WIRING DIAGRAM

B001D1ME01

CAUTION / NOTICE / HINT

Note


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

  • w/ Entry and Start System:

    Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS


    1. Using the GTS, perform the Active Test.

      Click here

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Daytime Running Light Daytime running lights OFF or ON -
      OK
      Daytime running lights turn on.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT NO. 1 INTEGRATION RELAY (DRL)


    1. Remove the No. 1 integration relay (DRL).

      Click here

    2. Inspect the No. 1 integration relay (DRL).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 INTEGRATION RELAY (DRL) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - BATTERY)


    1. B001EQBC01
      *a

      Front view of wire harness connector

      (to No. 1 Integration Relay)

      Remove the No. 1 integration relay.

      Click here

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      1S-1 - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND HEADLIGHT UNIT)


    1. Remove the No. 1 integration relay.

      Click here

    2. Disconnect the 2O driver side junction block assembly connector.

    3. Disconnect the A110 headlight unit LH connector.

    4. Disconnect the A112 headlight unit RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1V-4 - 2O-40 Always Below 1 Ω
      1V-3 - A110-1 Always Below 1 Ω
      1V-4 or 2O-40 - Body ground Always 10 kΩ or higher
      1V-3 or A110-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. B001GR2C01
      *a

      Component without harness connected

      (Driver Side Junction Block Assembly)

      Remove the driver side junction block assembly.

      Click here

    2. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2O-40 - A-25 (DRLE) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here