SEAT BELT WARNING SYSTEM Rear Seat Belt Warning Light Malfunction

DESCRIPTION

The main body ECU (multiplex network body ECU) detects whether either rear door is open or closed based on the condition of the left and right courtesy light switches and then sends the rear door status signal to the combination meter assembly. The combination meter assembly detects the rear seat belt state. The rear seat belt warning lights on the telltale light assembly illuminate or turn off in accordance with the rear door state, vehicle speed and rear seat belt state.

WIRING DIAGRAM

B0011J6E06

CAUTION / NOTICE / HINT

Note


  • The seat belt warning system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting Click here.

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

PROCEDURE


  1. READ VALUE USING GTS (REAR DOOR COURTESY LIGHT SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Main Body
      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

      		 -
      OK
      ON or OFF appears on the GTS screen according to the rear door condition.

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  2. CHECK REAR SEAT BELT WARNING


    1. B0011HFE01
      Text in Illustration
      *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 operate normally 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

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    READ VALUE USING GTS (REAR SEAT BELT BUCKLE SWITCH (FOR RH)) Click here

    D

    READ VALUE USING GTS (REAR SEAT BELT BUCKLE SWITCH (FOR CENTER)) Click here

    E

    READ VALUE USING GTS (REAR SEAT BELT BUCKLE SWITCH (FOR LH)) Click here

    B

  3. PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING LIGHT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Rear Seat Belt Rear seat belt warning light OFF/ON -
      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    A

  4. CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - TELLTALE LIGHT ASSEMBLY)


    1. Disconnect the H168 telltale light assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H168-8 (IG+) - Body ground Power switch on (IG) 11 to 14 V
      H168-8 (IG+) - Body ground Power switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Reconnect the H168 telltale light assembly connector.

    2. Disconnect the H14 combination meter assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H14-6 (RRBT) - Body ground Always 11 to 14 V
      H14-18 (PBLT) - Body ground Always 11 to 14 V
      H14-35 (RLBT) - Body ground Always 11 to 14 V

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

  6. READ VALUE USING GTS (REAR SEAT BELT BUCKLE SWITCH (FOR RH))


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      2nd-Row Seatbelt Buckle (R) Rear RH seat belt buckle switch signal/ON or OFF

      OFF: Rear RH seat belt fastened

      ON: Rear RH seat belt not fastened

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

    B

    PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING LIGHT) Click here

    A

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


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the Q36 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
      H14-7 (RRSB) - Q36-1 (RBR+) Always Below 1 Ω
      H14-7 (RRSB) - Body ground Always 10 kΩ or higher
      Q36-1 (RBR+) - Body ground Always 10 kΩ or higher
      Q36-2 (RBR-) - Body ground Always Below 1 Ω

    OK

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING LIGHT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Rear Seat Belt Rear seat belt warning light OFF/ON -
      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    A

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


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the H168 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H14-6 (RRBT) - H168-1 (RRID) Always Below 1 Ω
      H14-6 (RRBT) - Body ground Always 10 kΩ or higher
      H168-1 (RRID) - Body ground Always 10 kΩ or higher

    OK

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. READ VALUE USING GTS (REAR SEAT BELT BUCKLE SWITCH (FOR CENTER))


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      2nd-Row Seatbelt Buckle (C) Rear center seat belt buckle switch signal/ON or OFF

      OFF: Rear center seat belt fastened

      ON: Rear center seat belt not fastened

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

    B

    PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING LIGHT) Click here

    A

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


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the Q36 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
      H14-8 (RCSB) - Q36-4 (CBR+) Always Below 1 Ω
      H14-8 (RCSB) - Body ground Always 10 kΩ or higher
      Q36-4 (CBR+) - Body ground Always 10 kΩ or higher
      Q36-5 (CBR-) - Body ground Always Below 1 Ω

    OK

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING LIGHT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Rear Seat Belt Rear seat belt warning light OFF/ON -
      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    A

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


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the H168 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H14-18 (PBLT) - H168-2 (RCID) Always Below 1 Ω
      H14-18 (PBLT) - Body ground Always 10 kΩ or higher
      H168-2 (RCID) - Body ground Always 10 kΩ or higher

    OK

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. READ VALUE USING GTS (REAR SEAT BELT BUCKLE SWITCH (FOR LH))


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      2nd-Row Seatbelt Buckle (L) Rear LH seat belt buckle switch signal/ON or OFF

      OFF: Rear LH seat belt fastened

      ON: Rear LH seat belt not fastened

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

    B

    PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING LIGHT) Click here

    A

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


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the P37 rear seat inner with center belt assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H14-9 (RLSB) - P37-1 (LBR+) Always Below 1 Ω
      H14-9 (RLSB) - Body ground Always 10 kΩ or higher
      P37-1 (LBR+) - Body ground Always 10 kΩ or higher
      P37-2 (LBR-) - Body ground Always Below 1 Ω

    OK

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  16. PERFORM ACTIVE TEST USING GTS (REAR SEAT BELT WARNING LIGHT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Rear Seat Belt Rear seat belt warning light OFF/ON -
      Result
      Result Proceed to
      The rear seat belt warning light does not operate normally A
      The rear seat belt warning light operates normally B

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    A

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


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the H168 telltale light assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H14-35 (RLBT) - H168-3 (RLID) Always Below 1 Ω
      H14-35 (RLBT) - Body ground Always 10 kΩ or higher
      H168-3 (RLID) - Body ground Always 10 kΩ or higher

    OK

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR