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LIGHTING SYSTEM Taillight Circuit

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DTC Code DTC Name
  Taillight Circuit
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DESCRIPTION

The main body ECU (multiplex network body ECU) controls the taillight and license plate light.

B004YISE02
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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 auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the auxiliary battery terminal notice before proceeding with work.

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PROCEDURE


  1. Click here

    INSPECT LIGHTS


    1. Check the problem symptoms.

      Result
      Result Proceed to
      All taillights and the license plate light do not illuminate A
      The rear combination light assembly (taillight) does not illuminate B
      The rear light assembly (taillight) and license plate light do not illuminate C

  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
        Tail Input Signal Light control switch tail position input signal OFF or ON

        OFF: Light control switch in neither tail nor head position

        ON: Light control switch in tail or head position

        		 -



      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display
        Tail Input Signal




      OK
      Display changes according to the taillight illumination condition.
      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

    READ VALUE USING GTS


    1. Turn the taillights on.

    2. 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 Tail Light No.1 Fuse Taillight 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 Tail Light No.1 Fuse




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

  4. 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
        Tail Light No.1 Output Signal Taillight output OFF or ON

        OFF: Taillight not illuminated

        ON: Taillight illuminated

        		 Taillights blink while welcome light is operating



      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display
        Tail Light No.1 Output Signal




      OK
      Display changes according to the taillight illumination condition.
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU)


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

    2. Disconnect the L82 rear combination light assembly LH connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L82-2 (B) - L111-16 (L) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECUClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    CHECK REAR COMBINATION LIGHT ASSEMBLY LH


    1. Disconnect the L82 rear combination light assembly LH connector.

    2. Turn the taillights off.

    3. Turn the taillights 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 Tail Light No.1 Fuse Taillight 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 Tail Light No.1 Fuse




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

  7. Click here

    CHECK REAR COMBINATION LIGHT LED LH


    1. Remove the rear combination light LED LH.

      Click here

    2. Reconnect the L82 rear combination light assembly LH connector.

    3. Turn the taillights off.

    4. Turn the taillights on.

    5. 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 Tail Light No.1 Fuse Taillight 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 Tail Light No.1 Fuse




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

    • OK

      REPLACE REAR COMBINATION LIGHT LED LHClick here

    • NG

      REPLACE REAR COMBINATION LIGHT LENS AND BODY LHClick here

  8. Click here

    CHECK REAR COMBINATION LIGHT ASSEMBLY RH


    1. Disconnect the L81 rear combination light assembly RH connector.

    2. Turn the taillights off.

    3. Turn the taillights 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 Tail Light No.1 Fuse Taillight 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 Tail Light No.1 Fuse




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

  9. Click here

    CHECK REAR COMBINATION LIGHT LED RH


    1. Remove the rear combination light LED RH.

      Click here

    2. Reconnect the L81 rear combination light assembly RH connector.

    3. Turn the taillights off.

    4. Turn the taillights on.

    5. 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 Tail Light No.1 Fuse Taillight 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 Tail Light No.1 Fuse




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

    • OK

      REPLACE REAR COMBINATION LIGHT LED RHClick here

    • NG

      REPLACE REAR COMBINATION LIGHT LENS AND BODY RHClick here

  10. Click here

    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU)


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

    2. Disconnect the L82 rear combination light assembly LH connector.

    3. Disconnect the L81 rear combination light assembly RH connector.

    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
      L82-2 (B) or L111-16 (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

  11. Click here

    READ VALUE USING GTS


    1. Turn the taillights on.

    2. 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 Tail Light No.2 Fuse Taillight 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 Tail Light No.2 Fuse




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

  12. 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
        Tail Light No.2 Output Signal Taillight output OFF or ON

        OFF: Taillight not illuminated

        ON: Taillight illuminated

        		 Taillights blink while welcome light is operating



      1. Body Electrical > Power Integration No.3 > Data List
        Tester Display
        Tail Light No.2 Output Signal




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

  13. Click here

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


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

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

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L86-2 (B) - L111-17 (TAIL) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECUClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. Click here

    CHECK REAR LIGHT LENS AND BODY LH


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

    2. Turn the taillights off.

    3. Turn the taillights 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 Tail Light No.2 Fuse Taillight 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 Tail Light No.2 Fuse




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

  15. Click here

    CHECK REAR LIGHT LED LH


    1. Remove the rear light LED LH.

      Click here

    2. Reconnect the L86 rear light lens and body LH connector.

    3. Turn the taillights off.

    4. Turn the taillights on.

    5. 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 Tail Light No.2 Fuse Taillight 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 Tail Light No.2 Fuse




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

  16. Click here

    CHECK REAR LIGHT LENS AND BODY RH


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

    2. Turn the taillights off.

    3. Turn the taillights 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 Tail Light No.2 Fuse Taillight 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 Tail Light No.2 Fuse




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

  17. Click here

    CHECK REAR LIGHT LED RH


    1. Remove the rear light LED RH.

      Click here

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

    3. Turn the taillights off.

    4. Turn the taillights on.

    5. 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 Tail Light No.2 Fuse Taillight 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 Tail Light No.2 Fuse




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

  18. Click here

    CHECK LICENSE PLATE LIGHT ASSEMBLY RH


    1. Disconnect the L88 license plate light assembly RH connector.

    2. Turn the taillights off.

    3. Turn the taillights 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 Tail Light No.2 Fuse Taillight 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 Tail Light No.2 Fuse




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

  19. Click here

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


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

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

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

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

    5. Disconnect the L88 license plate light assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L86-2 (B) or L111-17 (TAIL) - 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