LIGHTING SYSTEM DRL Relay Circuit

DTC Code DTC Name
DRL Relay Circuit

DESCRIPTION

The main body ECU controls the daytime running lights.

WIRING DIAGRAM

E270014E02

CAUTION / NOTICE / HINT

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).

      Table 1. 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).

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  2. INSPECT DRL RELAY

    1. E270015E02

      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

    REPLACE DRL RELAY

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

    1. E270016E01

      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
      Table 2. Text in Illustration

      *1

      No. 4 Relay Block

      *2

      DRL Relay

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

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

      U124044E02
      Table 3. 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

      Table 4. 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
      Table 5. 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

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR