LIGHTING SYSTEM Rear Fog Light does not Illuminate

DESCRIPTION

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

WIRING DIAGRAM

A01EOH4E01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (HEADLIGHT DIMMER SWITCH)


    1. Using the intelligent tester, read the Data List.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Rear Fog Light SW Rear fog light switch signal/ON or OFF

      ON: Rear fog light switch on

      OFF: Rear fog light switch off

      		 -
      OK
      When the headlight dimmer switch operation is performed, the result will be the same as above.

    NG

    INSPECT HEADLIGHT DIMMER SWITCH Click here

    OK

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Using the intelligent tester, perform the Active Test.

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

    NG

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY) Click here

    OK

    REPLACE MAIN BODY ECU

  3. INSPECT HEADLIGHT DIMMER SWITCH

    A01EROOE07

    1. A01ER6LE07

      for LHD:


      1. Remove the headlight dimmer switch Click here.

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        2 (B) - 3 (LFG) Headlight dimmer switch (Rear fog light switch) on Below 1 Ω
        Headlight dimmer switch (Rear fog light switch) off 10 kΩ or higher

    2. for RHD:


      1. Remove the headlight dimmer switch Click here.

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        9 (B) - 8 (LFG) Headlight dimmer switch (Rear fog light switch) on Below 1 Ω
        Headlight dimmer switch (Rear fog light switch) off 10 kΩ or higher
        Result
        Result Proceed to
        OK A
        NG (for LHD) B
        NG (for RHD) C

    B

    REPLACE HEADLIGHT DIMMER SWITCH Click here

    C

    REPLACE HEADLIGHT DIMMER SWITCH Click here

    A

  4. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU)

    A01ER3KE03

    1. Disconnect the E14 switch connector.

    2. Disconnect the E2 ECU connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      E14-2 (B) - E2-9 (RFOG) Always Below 1 Ω
      E14-3 (LFG) - Body ground
      E14-2 (B) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      E14-9 (B) - E2-9 (RFOG) Always Below 1 Ω
      E14-8 (LFG) - Body ground
      E14-9 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU

  5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY)


    1. A01ES6HE01

      Disconnect the 2A ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2A-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (REAR FOG LIGHT - MAIN BODY ECU AND BODY GROUND)

    A01ENQ7E02

    1. Disconnect the 2C ECU connector.

    2. Disconnect the O5 and O6 light connectors.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      2C-8 (RFGO) - O6-2 Always Below 1 Ω
      O6-1 - Body ground
      O6-2 - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      2C-8 (RFGO) - O5-2 Always Below 1 Ω
      O5-1 - Body ground
      O5-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE REAR FOG LIGHT Click here