LIGHTING SYSTEM Taillight Circuit

DESCRIPTION

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

WIRING DIAGRAM

B000X4OE01

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 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. PERFORM ACTIVE TEST USING GTS


    1. Using the GTS, perform the Active Test.

      Click here


      Body Electrical > Main Body > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Taillight Relay Taillights and license plate light OFF or ON -

      Body Electrical > Main Body > Active Test
      Tester Display
      Taillight Relay
      OK
      Taillights and license plate light illuminate.
      Result
      Procced to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. READ VALUE USING GTS


    1. Turn the light control switch tail position.

    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 LENS AND BODY LH Click here

    OK

  3. 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

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 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 (TAILLIGHT CIRCUIT)


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

    2. Disconnect the X99 No. 3 semiconductor power integration ECU connector.

    3. Disconnect the X70 rear combination light lens and body LH connector.

    4. Disconnect the X69 rear combination light lens and body RH connector.

    5. Disconnect the c5 license plate light sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X99-16 (L) - X70-1 (TL) Always Below 1 Ω

    7. Connect the cable to the negative (-) battery terminal.

    8. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      X99-16 (L) or X70-1 (TL) - Body ground Always Below 1 V
      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 LENS AND BODY LH


    1. Disconnect the X70 rear combination light lens and body LH connector.

    2. w/ Light Control Switch Off Position:


      1. Turn the light control switch off position.

      2. Turn the light control switch tail position.

    3. except Driver Door-linked Auto Light Turn-off System:


      1. Turn the light control switch AUTO position.

      2. Turn the engine switch off.

      3. Turn the engine switch on (IG).

      4. Turn the light control switch tail position.

    4. for Driver Door-linked Auto Light Turn-off System, w/ Delay Function:


      1. Close all of the doors.

      2. Turn the engine switch off.

      3. Open the driver door.

      4. Close the driver door.

      5. Turn the engine switch on (IG).

      6. Turn the light control switch tail position.

    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 LENS AND BODY LH Click here

    NG

  7. CHECK REAR COMBINATION LIGHT LENS AND BODY RH


    1. Disconnect the X69 rear combination light lens and body RH connector.

    2. w/ Light Control Switch Off Position:


      1. Turn the light control switch off position.

      2. Turn the light control switch tail position.

    3. except Driver Door-linked Auto Light Turn-off System:


      1. Turn the light control switch AUTO position.

      2. Turn the engine switch off.

      3. Turn the engine switch on (IG).

      4. Turn the light control switch tail position.

    4. for Driver Door-linked Auto Light Turn-off System, w/ Delay Function:


      1. Close all of the doors.

      2. Turn the engine switch off.

      3. Open the driver door.

      4. Close the driver door.

      5. Turn the engine switch on (IG).

      6. Turn the light control switch tail position.

    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 LENS AND BODY RH Click here

    NG

  8. CHECK LICENSE PLATE LIGHT SUB-ASSEMBLY


    1. Disconnect the c5 license plate light sub-assembly connector.

    2. w/ Light Control Switch Off Position:


      1. Turn the light control switch off position.

      2. Turn the light control switch tail position.

    3. except Driver Door-linked Auto Light Turn-off System:


      1. Turn the light control switch AUTO position.

      2. Turn the engine switch off.

      3. Turn the engine switch on (IG).

      4. Turn the light control switch tail position.

    4. for Driver Door-linked Auto Light Turn-off System, w/ Delay Function:


      1. Close all of the doors.

      2. Turn the engine switch off.

      3. Open the driver door.

      4. Close the driver door.

      5. Turn the engine switch on (IG).

      6. Turn the light control switch tail position.

    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 LICENSE PLATE LIGHT SUB-ASSEMBLY Click here

    NG

  9. CHECK HARNESS AND CONNECTOR (TAILLIGHT CIRCUIT)


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

    2. Disconnect the X99 No. 3 semiconductor power integration ECU connector.

    3. Disconnect the X70 rear combination light lens and body LH connector.

    4. Disconnect the X69 rear combination light lens and body RH connector.

    5. Disconnect the c5 license plate light sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X99-16 (L) or X70-1 (TL) - 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