Click here

SEAT BELT WARNING SYSTEM(w/o Occupant Classification System) Rear Seat Belt Warning Light Malfunction

Click here
Click here
DTC Code DTC Name
  Rear Seat Belt Warning Light Malfunction
Click here

DESCRIPTION

The main body ECU (multiplex network body ECU) detects whether either the rear doors are open or closed based on the courtesy light switch condition and then sends the rear door status signal to the combination meter assembly. The combination meter assembly detects rear seat belt state. The rear seat belt warning light on the telltale light assembly illuminates, blinks or turns off in accordance with the rear door state, vehicle speed and rear seat belt state.

Click here

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

Note:

  • The seat belt warning system (w/o Occupant Classification System) uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

Click here

PROCEDURE


  1. Click here

    READ VALUE USING GTS (RR DOOR COURTESY SW, RL DOOR COURTESY SW)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the Data List according to the display on the GTS.


      1. Body Electrical > Main Body > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        RR Door Courtesy SW Rear door courtesy light switch RH ON or OFF

        ON: Rear door RH open

        OFF: Rear door RH closed

        		 -
        RL Door Courtesy SW Rear door courtesy light switch LH ON or OFF

        ON: Rear door LH open

        OFF: Rear door LH closed

        		 -




      1. Body Electrical > Main Body > Data List
        Tester Display
        RR Door Courtesy SW
        RL Door Courtesy SW





      OK
      The GTS display changes correctly in response to the rear door condition.
      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK REAR SEAT BELT WARNING


    1. B006Z61C02
      *1 Rear Seat Belt Warning Light (Telltale Light Assembly)
      *a LH
      *b Center
      *c RH

      Check the rear seat belt warning function.

      Click here

      Result
      Result Proceed to
      The rear seat belt warning lights operation is normal A
      The rear seat belt warning lights (all seats) do not operate normally B
      The rear seat belt warning light (RH) does not operate normally C
      The rear seat belt warning light (center) does not operate normally D
      The rear seat belt warning light (LH) does not operate normally E

  3. Click here

    PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Combination Meter > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Rear Seat Belt Warning Rear seat belt warning light OFF/ON -



      1. Body Electrical > Combination Meter > Active Test
        Tester Display
        Rear Seat Belt Warning




      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

  4. Click here

    CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. Disconnect the K36 telltale light assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K36-10 (IG+) - Body ground Ignition switch to ON (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Click here

    CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Reconnect the K36 telltale light assembly connector.

    2. Disconnect the K21 combination meter assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K21-18 (RLMT) - Body ground Ignition switch to ON (IG) 11 to 14 V
      K21-19 (RCMT) - Body ground Ignition switch to ON (IG) 11 to 14 V
      K21-20 (RRMT) - Body ground Ignition switch to ON (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

  6. Click here

    READ VALUE USING GTS (REAR RIGHT SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Data List.

    5. Read the Data List according to the display on the GTS.


      1. Body Electrical > Combination Meter > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Rear Right Seat Buckle / Occupant Detection Warning Switch Rear seat inner with center belt RH buckle signal ON or OFF

        OFF: Rear RH seat belt fastened

        ON: Rear RH seat belt not fastened

        		 -



      1. Body Electrical > Combination Meter > Data List
        Tester Display
        Rear Right Seat Buckle / Occupant Detection Warning Switch




      Result
      Result Proceed to
      ON or OFF does not appear on the tester screen according to the rear seat belt condition A
      ON or OFF appears on the tester screen according to the rear seat belt condition B

  7. Click here

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT INNER WITH CENTER BELT ASSEMBLY RH - BODY GROUND)


    1. Disconnect the K21 combination meter assembly connector.

    2. Disconnect the R72 rear seat inner with center belt assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K21-26 (RRSB) - R72-5 Always Below 1 Ω
      K21-26 (RRSB) or R72-5 - Body ground Always 10 kΩ or higher
      R72-4 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY RHClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Combination Meter > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Rear Seat Belt Warning Rear seat belt warning light OFF/ON -



      1. Body Electrical > Combination Meter > Active Test
        Tester Display
        Rear Seat Belt Warning




      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

  9. Click here

    CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the K21 combination meter assembly connector.

    2. Disconnect the K36 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K21-20 (RRMT) - K36-3 (RRID) Always Below 1 Ω
      K21-20 (RRMT) or K36-3 (RRID) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE TELLTALE LIGHT ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

    READ VALUE USING GTS (REAR CENTER SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Data List.

    5. Read the Data List according to the display on the GTS.


      1. Body Electrical > Combination Meter > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Rear Center Seat Buckle / Occupant Detection Warning Switch Rear seat inner with center belt LH (for center) buckle signal ON or OFF

        OFF: Rear LH seat belt (for center) fastened

        ON: Rear LH seat belt (for center) not fastened

        		 -



      1. Body Electrical > Combination Meter > Data List
        Tester Display
        Rear Center Seat Buckle / Occupant Detection Warning Switch




      Result
      Result Proceed to
      ON or OFF does not appear on the tester screen according to the rear seat belt condition A
      ON or OFF appears on the tester screen according to the rear seat belt condition B

  11. Click here

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH (FOR CENTER) - BODY GROUND)


    1. Disconnect the K21 combination meter assembly connector.

    2. Disconnect the R74 rear seat inner with center belt assembly LH (for center) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K21-25 (RCSB) - R74-1 Always Below 1 Ω
      K21-25 (RCSB) or R74-1 - Body ground Always 10 kΩ or higher
      R74-2 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LHClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. Click here

    PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Combination Meter > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Rear Seat Belt Warning Rear seat belt warning light OFF/ON -



      1. Body Electrical > Combination Meter > Active Test
        Tester Display
        Rear Seat Belt Warning




      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

  13. Click here

    CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the K21 combination meter assembly connector.

    2. Disconnect the K36 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K21-19 (RCMT) - K36-2 (RCID) Always Below 1 Ω
      K21-19 (RCMT) or K36-2 (RCID) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE TELLTALE LIGHT ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. Click here

    READ VALUE USING GTS (REAR LEFT SEAT BUCKLE / OCCUPANT DETECTION WARNING SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Data List.

    5. Read the Data List according to the display on the GTS.


      1. Body Electrical > Combination Meter > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Rear Left Seat Buckle / Occupant Detection Warning Switch Rear seat inner with center belt LH (for LH) buckle signal ON or OFF

        OFF: Rear LH seat belt (for LH) fastened

        ON: Rear LH seat belt (for LH) not fastened

        		 -



      1. Body Electrical > Combination Meter > Data List
        Tester Display
        Rear Left Seat Buckle / Occupant Detection Warning Switch




      Result
      Result Proceed to
      ON or OFF does not appear on the tester screen according to the rear seat belt condition A
      ON or OFF appears on the tester screen according to the rear seat belt condition B

  15. Click here

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH (FOR LH) - BODY GROUND)


    1. Disconnect the K21 combination meter assembly connector.

    2. Disconnect the R73 rear seat inner with center belt assembly LH (for LH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K21-24 (RLSB) - R73-5 Always Below 1 Ω
      K21-24 (RLSB) or R73-5 - Body ground Always 10 kΩ or higher
      R73-4 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LHClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  16. Click here

    PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Combination Meter > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Rear Seat Belt Warning Rear seat belt warning light OFF/ON -



      1. Body Electrical > Combination Meter > Active Test
        Tester Display
        Rear Seat Belt Warning




      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

  17. Click here

    CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the K21 combination meter assembly connector.

    2. Disconnect the K36 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K21-18 (RLMT) - K36-1 (RLID) Always Below 1 Ω
      K21-18 (RLMT) or K36-1 (RLID) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE TELLTALE LIGHT ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR