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

A0155RJE02

INSPECTION PROCEDURE

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 (FRONT FOG LIGHT)


    1. Using the intelligent tester, 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.

    NG

    INSPECT FOG LIGHT RELAY (FR FOG) Click here

    OK

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

  2. INSPECT FOG LIGHT RELAY (FR FOG)


    1. A015937E13

      Remove the fog light relay from the engine room relay block, junction 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 to terminals 1 and 2 10 kΩ or higher
      Battery voltage applied to terminals 1 and 2 Below 1 Ω

    NG

    REPLACE FOG LIGHT RELAY (FR FOG)

    OK

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


    1. A015DRJE03
      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 RELAY [FR FOG] - MAIN BODY ECU [COWL SIDE JUNCTION BLOCK LH])


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

    2. Disconnect the E1 main body ECU 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 - E1-4 (FFGO) Always Below 1 Ω
      Fog light relay terminal 1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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