LIGHTING SYSTEM Front Fog Light Circuit

DTC Code DTC Name
Front Fog Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the front fog lights.

WIRING DIAGRAM

E259590E02

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. CHECK OPERATION (TAILLIGHTS)

    1. Check the operation of the taillights.

      OK

      Taillights operate normally.

    Result

    Proceed to

    OK

    NG
    NG

    GO TO PROBLEM SYMPTOMS TABLE

    Click hereClick hereClick hereClick hereClick here

    OK

  2. PERFORM ACTIVE TEST USING GTS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Active Test.

    5. Check that the relay operates.

      Body Electrical > Main Body > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      Front Fog Light Relay

      Front fog light relay

      ON/OFF

      Light control switch is in tail position

      Body Electrical > Main Body > Active Test

      Tester Display

      Front Fog Light Relay

      OK

      Front fog light relay operates. (Front fog lights come on.)

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick hereClick hereClick hereClick here

    NG

  3. CHECK HARNESS AND CONNECTOR (FR FOG RELAY INPUT VOLTAGE)

    1. Remove the FR FOG relay from the No. 4 relay block assembly.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      2 - Body ground

      Taillights on

      11 to 14 V

      5 - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (FR FOG RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)Click here

    OK

  4. INSPECT FR FOG RELAY

    1. E222294N09

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3 - 5

      Voltage not applied between terminals 1 and 2

      10 kΩ or higher

      3 - 5

      Voltage applied between terminals 1 and 2

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FR FOG RELAY

    OK

  5. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - FOG LIGHT ASSEMBLY LH AND FOG LIGHT ASSEMBLY RH)

    1. Disconnect the A25 fog light assembly LH connector.

    2. Disconnect the A22 fog light assembly RH connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3 - A25-2

      Always

      Below 1 Ω

      3 - A22-2

      Always

      Below 1 Ω

      3 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the 3C instrument panel junction block assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 - 3C-43

      Always

      Below 1 Ω

      1 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

      for LHD:Click hereClick here

      for RHD:Click hereClick here

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

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

      E259586C03

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3C-43 - MB-13 (FFGO)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:Click hereClick here

    for RHD:Click hereClick here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:Click hereClick here

    for RHD:Click hereClick here

  8. CHECK HARNESS AND CONNECTOR (FR FOG RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the 3D instrument panel junction block assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      5 - 3D-10

      Always

      Below 1 Ω

      5 - Body ground

      Always

      10 kΩ or higher

      2 - 3D-47

      Always

      Below 1 Ω

      2 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:Click hereClick here

    for RHD:Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR