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LIGHTING SYSTEM Rear Fog Light Circuit

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DTC Code DTC Name
  Rear Fog Light Circuit
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DESCRIPTION

The main body ECU (multiplex network body ECU) controls the rear fog light.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CXPI communication malfunctions before troubleshooting this symptom.

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  • First, confirm that there is no malfunction in the power integration system. Refer to the How to Proceed with Troubleshooting procedure.

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  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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  • When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

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PROCEDURE


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    READ VALUE USING GTS


    1. Turn the rear fog light switch on.

    2. Using the GTS, read the Data List.

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      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Status of Rear Fog Light Fuse Rear fog light fuse Connect or Disconnect

        Connect: Fuse not shut off

        Disconnect: Fuse shut off

        		 -



      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display
        Status of Rear Fog Light Fuse




      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

  2. Click here

    READ VALUE USING GTS


    1. Using the GTS, read the Data List.

      Click here


      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Rear Fog Light Input Signal Rear fog light switch input signal OFF or ON

        OFF: Rear fog light switch off

        ON: Rear fog light switch on

        		 -



      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display
        Rear Fog Light Input Signal




      OK
      Display changes according to the rear fog light switch operation.
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECUClick here

    • NG

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

  3. Click here

    CHECK REAR LIGHT LENS AND BODY LH


    1. Disconnect the L86 rear light lens and body LH connector.

    2. Turn the rear fog light switch off.

    3. Turn the rear fog light switch on.

    4. Using the GTS, read the Data List.

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      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Status of Rear Fog Light Fuse Rear fog light fuse Connect or Disconnect

        Connect: Fuse not shut off

        Disconnect: Fuse shut off

        		 -



      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display
        Status of Rear Fog Light Fuse




      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK REAR LIGHT LENS AND BODY RH


    1. Disconnect the L90 rear light lens and body RH connector.

    2. Turn the rear fog light switch off.

    3. Turn the rear fog light switch on.

    4. Using the GTS, read the Data List.

      Click here


      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Status of Rear Fog Light Fuse Rear fog light fuse Connect or Disconnect

        Connect: Fuse not shut off

        Disconnect: Fuse shut off

        		 -



      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display
        Status of Rear Fog Light Fuse




      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK HARNESS AND CONNECTOR (REAR LIGHT LENS AND BODY - NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU)


    1. Disconnect the L86 rear light lens and body LH connector.

    2. Disconnect the L90 rear light lens and body RH connector.

    3. Disconnect the cable from the negative (-) auxiliary battery terminal.

    4. Disconnect the L111 No. 3 semiconductor power integration ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L86-10 (B) or L111-19 (L) - Body ground Always 10 kΩ or higher
      L90-10 (B) or L111-18 (L) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECUClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR