LIGHTING SYSTEM DRL Relay Circuit

DESCRIPTION

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

WIRING DIAGRAM


  1. w/ Front Seat Control System (w/ Memory)

    A01VA3PE02

  2. w/ Front Seat Control System (w/o Memory)

    A01VA3PE03

CAUTION / NOTICE / HINT

Note


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

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE


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


    1. Using the GTS, perform the Active Test.

      Click here


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Daytime Running Light Daytime running light ON or OFF -

      Body Electrical > Main Body > Active Test
      Tester Display
      Daytime Running Light
      Result
      Proceed to
      Daytime running lights come on
      Daytime running lights do not come on

    Daytime running lights come on

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    Daytime running lights do not come on

  2. INSPECT DAYTIME RUNNING LIGHT RELAY (DRL)


    1. A01V9BWN01

      Remove the daytime running light relay from the No. 2 engine room relay block and junction block assembly.

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

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

    NG

    REPLACE DAYTIME RUNNING LIGHT RELAY (DRL)

    OK

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


    1. A01V8QPC01
      *a

      Front view of wire harness connector

      (to Daytime Running Light Relay)

      Remove the daytime running light relay from the No. 2 engine room relay block and junction block assembly.

    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 1 - Body ground
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      w/ Front Seat Control System (w/ Memory) A
      w/ Front Seat Control System (w/o Memory) B

    B

    CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY [DRL] - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    A

  5. CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY [DRL] - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Remove the daytime running light relay from the No. 2 engine room relay block and junction block assembly.

    2. Disconnect the 3B instrument panel 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 2 - 3B-52 Always Below 1 Ω
      3B-52 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A01V8KIE04

      Remove the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-7 (DRLE) - 3B-52 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for LHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here
    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for RHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (DAYTIME RUNNING LIGHT RELAY [DRL] - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Remove the daytime running light relay from the No. 2 engine room relay block and junction block assembly.

    2. Disconnect the 3B instrument panel 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 2 - 3D-10 Always Below 1 Ω
      3D-10 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A01V8ASE02

      Remove the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-10 (DRLE) - 3D-10 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for LHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here
    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for RHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here