LIGHTING SYSTEM Daytime Running Light Relay Circuit

DESCRIPTION

for LED Headlight:

The main body ECU controls the daytime running lights.

for Halogen Headlight:

The main body ECU controls the headlight ON system.

WIRING DIAGRAM

A01XHK0E04

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 (DAYTIME RUNNING LIGHT)


    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 relay ON/OFF -
      OK
      Daytime running Lights (for LED Headlight) or LO beam headlights (for Halogen Headlight) illuminate.

    OK

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

    NG

  2. INSPECT DAYTIME RUNNING LIGHT RELAY (DRL)


    1. A01XJBNE21

      Remove the daytime running light relay from the engine room No. 5 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 DAYTIME RUNNING LIGHT RELAY RELAY (DRL)

    OK

  3. CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY [DRL] - BATTERY)


    1. A01XL6UE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Daytime Running Light Relay [DRL])

      Remove the daytime running light relay from the engine room No. 5 relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Daytime running light relay terminal 5 - Body ground Always 11 to 14 V
      Daytime running light relay terminal 2 - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY [DRL] - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


    1. Remove the daytime running light relay from the engine room No. 5 relay block.

    2. Disconnect the 2F 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
      Daytime running light relay terminal 1 - 2F-24 Always Below 1 Ω
      2F-24 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY


    1. A01XDZ4E01

      Remove the driver side junction block assembly Click here.

    2. Remove the main 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
      A-22 (DRL) - 2F-24 Always Below 1 Ω

    OK

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

    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY Click here