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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Lighting System (W/ AFS) - Diagnostic Codes & Circuit Tests) >> LIGHTING SYSTEM (w/ AFS) >> Front Fog Light Circuit [02/2019 - 12/2021] >> Procedure

Front Fog Light Circuit [02/2019 - 12/2021]: Procedure

WARNING: This page is about a different car, the 2021 Toyota RAV4, 2020 Toyota RAV4, and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > Main Body > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Front Fog Light Relay Front fog light Relay OFF or ON Light control switch 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

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    Refer to PROBLEM SYMPTOMS TABLE [02/2019 - 08/2020] , or refer to PROBLEM SYMPTOMS TABLE [08/2020 - 12/2021]

    Result: 

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (FOG FR RELAY - BATTERY) 
    1. Remove the FOG FR relay.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      5 (FOG FR relay) - Body ground Power switch off 11 to 14 V
      GTY510431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to FOG FR Relay)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (FOG FR RELAY INPUT VOLTAGE) 
    1. Remove the FOG FR relay.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      2 (FOG FR relay) - Body ground Light control switch in TAIL or HEAD position 11 to 14 V
      GTY510431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to FOG FR Relay)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  4

  4. INSPECT FOG FR RELAY 
    1. Remove the FOG FR relay.
    2. Inspect the FOG FR relay.

      Refer to ON-VEHICLE INSPECTION [02/2019 - ]

      Result

      Proceed to
      OK (for Bulb Type)
      OK (for LED Type)
      NG

    Result: 

    OK (for LED Type) 

    See step  8

    Result: 

    NG 

    REPLACE FOG FR RELAY 

    Result: 

    OK (for Bulb Type) 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (FOG FR RELAY - FOG LIGHT BULB LH) 
    1. Remove the FOG FR relay.
    2. Disconnect the B10 fog light bulb RH connector.
    3. Disconnect the B11 fog light bulb LH connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (FOG FR relay) - B11-2 (B) Always Below 1 Ω
      3 (FOG FR relay) or B11-2 (B) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (FOG FR RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Remove the FOG FR relay.
    2. Disconnect the 4A 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
      1 (FOG FR relay) - 4A-52 Always Below 1 Ω
      1 (FOG FR relay) or 4A-52 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY910629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Instrument Panel Junction Block Assembly)    		 - -
    1. Remove the instrument panel junction block assembly.

      Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021]

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

      Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      4A-52 - A-7 (FFGO) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021]

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021]

  8. CHECK HARNESS AND CONNECTOR (FOG FR RELAY - FOG LIGHT ASSEMBLY LH) 
    1. Remove the FOG FR relay.
    2. Disconnect the B10 fog light assembly RH connector.
    3. Disconnect the B11 fog light assembly LH connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (FOG FR relay) - B11-2 (B) Always Below 1 Ω
      3 (FOG FR relay) or B11-2 (B) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  5

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. CHECK HARNESS AND CONNECTOR (FOG FR RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Remove the FOG FR relay.
    2. Disconnect the 4F 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
      2 (FOG FR relay) - 4F-32 Always Below 1 Ω
      2 (FOG FR relay) or 4F-32 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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