LIGHTING SYSTEM Taillight Circuit

DESCRIPTION

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

WIRING DIAGRAM

B006G14E01
B006GS5E02

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

    Click here

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

    Click here

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

    Click here

PROCEDURE


  1. 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

    B

    READ VALUE USING GTS Click here

    C

    READ VALUE USING GTS Click here

    A

  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
      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

      		 -

      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 ECU Click here

    NG

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

  3. READ VALUE USING GTS


    1. Turn the taillights 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 Tail Light No.1 Fuse Taillight 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 Tail Light No.1 Fuse
      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

    NG

    CHECK REAR COMBINATION LIGHT ASSEMBLY LH Click here

    OK

  4. 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
      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

      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

    NG

    REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    OK

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


    1. Disconnect the cable from the negative (-) 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 ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. 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


      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

      		 -

      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

    NG

    CHECK REAR COMBINATION LIGHT ASSEMBLY RH Click here

    OK

  7. 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


      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

      		 -

      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 LH Click here

    NG

    REPLACE REAR COMBINATION LIGHT LENS AND BODY LH Click here

  8. 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


      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

      		 -

      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

    NG

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

    OK

  9. 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


      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

      		 -

      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 RH Click here

    NG

    REPLACE REAR COMBINATION LIGHT LENS AND BODY RH Click here

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


    1. Disconnect the cable from the negative (-) 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 ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. READ VALUE USING GTS


    1. Turn the taillights 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 Tail Light No.2 Fuse Taillight 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 Tail Light No.2 Fuse
      OK
      The Data List value displays "Connect".
      Result
      Proceed to
      OK
      NG

    NG

    CHECK REAR LIGHT LENS AND BODY LH Click here

    OK

  12. 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
      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

      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

    NG

    REPLACE NO. 3 SEMICONDUCTOR POWER INTEGRATION ECU Click here

    OK

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


    1. Disconnect the cable from the negative (-) 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 ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. 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


      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

      		 -

      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

    NG

    CHECK REAR LIGHT LENS AND BODY RH Click here

    OK

  15. 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


      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

      		 -

      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

    OK

    REPLACE REAR LIGHT LED LH Click here

    NG

    REPLACE REAR LIGHT LENS AND BODY LH Click here

  16. 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


      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

      		 -

      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

    NG

    CHECK LICENSE PLATE LIGHT ASSEMBLY RH Click here

    OK

  17. 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


      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

      		 -

      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

    OK

    REPLACE REAR LIGHT LED RH Click here

    NG

    REPLACE REAR LIGHT LENS AND BODY RH Click here

  18. 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


      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

      		 -

      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

    OK

    REPLACE LICENSE PLATE LIGHT ASSEMBLY RH Click here

    NG

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


    1. Disconnect the cable from the negative (-) 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 ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR