LIGHTING SYSTEM DRL Relay Circuit

DESCRIPTION

The LED daylight system illuminates the lights when the light control switch position signal, engine speed signal and surrounding brightness signal are input to the main body ECU (multiplex network body ECU) and the LED daylight system operation conditions are met.

WIRING DIAGRAM

B001WYNE02

CAUTION / NOTICE / HINT

Note


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

  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (DAYTIME RUNNING LIGHT)


    1. Using the GTS, perform the Active Test Click here.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Daytime Running Light DRL light illumination operation ON or OFF Only when "Daytime Running Light" in the GTS customization settings is set to "ON".
      OK
      Daytime running lights come on.

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY)


    1. B001Z5BE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to No. 2 Integration Relay)

      Disconnect the No. 2 integration relay connectors.

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      1Y-1 - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      1X-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - COWL SIDE JUNCTION BLOCK LH)


    1. Disconnect the 1R No. 2 integration relay connector.

    2. Disconnect the 2H cowl side junction block LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1R-4 - 2H-28 Always Below 1 Ω
      1R-4 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT COWL SIDE JUNCTION BLOCK LH

    B001YXNE02

    1. for LHD:


      1. Remove the cowl side junction block LH Click here.

      2. Remove the main body ECU from the cowl side junction block LH Click here.

    2. for RHD:


      1. Remove the cowl side junction block LH Click here.

      2. Remove the main body ECU from the cowl side junction block LH Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-25 (DRLE) - 2H-28 Always Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    A

  5. INSPECT NO.2 INTEGRATION RELAY (DRL RELAY)


    1. Inspect the No. 2 integration relay Click here.


    NG

    REPLACE NO.2 INTEGRATION RELAY

    OK

  6. CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - HEADLIGHT ASSEMBLY)


    1. Disconnect the 1R No. 2 integration relay connector.

    2. Disconnect the A68 headlight assembly LH connector.

    3. Disconnect the A65 headlight assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1R-3 - A65-11(B) Always Below 1 Ω
      1R-3 - A68-11(B) Always Below 1 Ω
      1R-3 - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      NG B
      OK (for RHD) C

    A

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

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

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