LIGHTING SYSTEM Front Fog Light Circuit

DESCRIPTION

The main body ECU receives a front fog light switch information signal from the light control switch (front fog switch), and illuminates the front fog lights.

WIRING DIAGRAM

B001ZJRE03

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 GTS (FRONT FOG LIGHT)


    1. Using the GTS, perform the Active Test Click here.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Front Fog Light Relay Front fog light ON or OFF -
      OK
      Fog light turns on/turns off.

    OK

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

    NG

  2. INSPECT FOG LIGHT RELAY (FR FOG)


    1. Remove the fog light relay from the engine room relay block, junction block.

    2. Inspect the fog light relay Click here.


    NG

    REPLACE FOG LIGHT RELAY (FR FOG)

    OK

  3. CHECK HARNESS AND CONNECTOR (FOG LIGHT RELAY [FR FOG] - BATTERY)


    1. B001ZOXE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fog Light Relay [FR FOG])

      Remove the fog light relay from the engine room relay block, junction block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Fog light relay terminal 2 - Body ground Light control switch tail 11 to 14 V
      Fog light relay terminal 5 - Body ground Always

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (FOG LIGHT - FOG LIGHT RELAY [FR FOG] AND BODY GROUND


    1. Remove the fog light relay from the engine room relay block, junction block.

    2. Disconnect the B5*1 and B6*2 light connectors.


      • *1: for LH

      • *2: for RH

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      Fog light relay terminal 3 - B5-2 (B) Always Below 1 Ω
      B5-1 (E) - Body ground Always
      B5-2 (B) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      Fog light relay terminal 3 - B6-2 (B) Always Below 1 Ω
      B6-1 (E) - Body ground Always
      B6-2 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (FOG LIGHT - FOG LIGHT RELAY [FR FOG] - COWL SIDE JUNCTION BLOCK LH


    1. Remove the fog light relay from the engine room relay block, junction block.

    2. Disconnect the 2H cowl side junction block LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Fog light relay terminal 1 - 2H-31 Always Below 1 Ω
      Fog light relay terminal 3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK COWL SIDE JUNCTION BLOCK LH

    B001W9QE01
    Text in Illustration
    *a

    Component without harness connected

    (Cowl Side Junction Block LH)

    1. for LHD:


      1. Remove the cowl side junction block assembly Click here.

      2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH Click here.

    2. for RHD:


      1. Remove the cowl side junction block assembly Click here.

      2. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH Click here.

        Standard Resistance
        Tester Connection Condition Specified Condition
        2H-31 - A-7 (FFGO) Always Below 1 Ω
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

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

    B

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

    C

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here

    D

    REPLACE COWL SIDE JUNCTION BLOCK LH Click here