LIGHTING SYSTEM Rear Fog Light Circuit

DESCRIPTION

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

WIRING DIAGRAM

B006B2XE01

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

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

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PROCEDURE


  1. READ VALUE USING GTS


    1. Turn the rear fog light switch on.

    2. Using the GTS, read the Data List.

      Click here


      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

      		 -

      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

    NG

    CHECK REAR LIGHT LENS AND BODY LH Click here

    OK

  2. READ VALUE USING GTS


    1. Using the GTS, read the Data List.

      Click here


      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

      		 -

      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 ECU Click here

    NG

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

  3. 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.

      Click here


      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

      		 -

      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

    OK

    REPLACE REAR LIGHT LENS AND BODY LH Click here

    NG

  4. 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


      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

      		 -

      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

    OK

    REPLACE REAR LIGHT LENS AND BODY RH Click here

    NG

  5. 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 (-) 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 ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR