LIGHTING SYSTEM DRL Relay Circuit

DESCRIPTION

The main body ECU controls the daytime running lights.

WIRING DIAGRAM

A01IPRZE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DRL RELAY)


    1. Using the intelligent tester, perform the Active Test Click here.

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

    NG

    INSPECT DRL RELAY Click here

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  2. INSPECT DRL RELAY


    1. A01IOSNE01

      Remove the DRL relay from the No. 4 relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      3 - 5 Battery voltage applied between terminals 1 and 2 Below 1 Ω

    NG

    REPLACE DRL RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (BATTERY - DRL RELAY)


    1. A01INQVE01
      Text in Illustration
      *1 No. 4 Relay Block
      *2 DRL Relay

      Remove the DRL relay from the No. 4 relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      DRL relay terminal 1 - Body ground Always 11 to 14 V
      DRL relay terminal 5 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (DRL RELAY - MAIN BODY ECU)


    1. Remove the DRL relay from the No. 4 relay block.

      A01IORIE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU)

      		 *2 No. 4 Relay Block
      *3 for LHD *4 for RHD
      *5 DRL Relay - -

    2. Disconnect the H79*1 or H81*2 main body ECU connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      DRL relay terminal 2 - H79-3 (DRLE) Always Below 1 Ω
      H79-3 (DRLE) - Body ground Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      DRL relay terminal 2 - H81-14 (DRLE) Always Below 1 Ω
      H81-14 (DRLE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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