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

DESCRIPTION

When a rear door is opened and closed (the rear door courtesy light switch turns on and off) with the ignition switch ON, or when a rear door is opened and closed (the rear door courtesy light switch turns on and off) and then the ignition switch is turned to ON, the rear seat belt warning light in the telltale light assembly turns on to inform the driver of condition of the rear seat belts. If a rear seat belt is fastened or unfastened, the warning light changes to indicate the current condition of the rear seat belts.

Only for vehicles with a rear seat belt indicator.

WIRING DIAGRAM

A01V8Z0E03

CAUTION / NOTICE / HINT

Note


  • The seat belt warning system uses a CAN communication system. Inspect the communication function by following How to Proceed with troubleshooting.

    Click here

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE


  1. READ VALUE USING GTS (RL DOOR COURTESY SW, RR 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.


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

      ON: Rear door RH open

      OFF: Rear door RH closed

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

      ON: Rear door LH open

      OFF: Rear door LH closed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      RR Door Courtesy SW
      RL Door Courtesy SW
      Result
      Result Proceed to
      ON or OFF is displayed on the GTS screen according to the rear door courtesy light switch condition A
      ON or OFF is not displayed normally on the GTS screen according to the rear door courtesy light switch condition B

    B

    GO TO LIGHTING SYSTEM Click here

    A

  2. READ VALUE USING GTS (2ND-ROW SEATBELT BUCKLE [R], 2ND-ROW SEATBELT BUCKLE [L], 2ND-ROW SEATBELT BUCKLE [C])


    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.


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

      ON: Rear seat belt RH fastened

      OFF: Rear seat belt RH unfastened

      		 -
      2nd-Row Seatbelt Buckle (L) Rear seat belt buckle LH signal ON/OFF

      ON: Rear seat belt LH fastened

      OFF: Rear seat belt LH unfastened

      		 -
      2nd-Row Seatbelt Buckle (C) Rear center seat belt buckle signal ON/OFF

      ON: Rear center seat belt fastened

      OFF: Rear seat center belt unfastened

      		 -

      Body Electrical > Combination Meter > Data List
      Tester Display
      2nd-Row Seatbelt Buckle (R)
      2nd-Row Seatbelt Buckle (L)
      2nd-Row Seatbelt Buckle (C)
      Result
      Result Proceed to
      ON or OFF is displayed on the GTS screen according to the rear seat belt condition A
      ON or OFF is not displayed normally on the GTS screen according to the rear seat belt condition B

    B

    INSPECT REAR SEAT INNER BELT ASSEMBLY Click here

    A

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


    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.


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

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Rear Seat Belt
      OK
      The rear seat belt warning light on the combination meter assembly operates normally.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT TELLTALE LIGHT ASSEMBLY Click here

    OK

  4. REPLACE COMBINATION METER ASSEMBLY


    1. Replace the combination meter assembly with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK REAR SEAT BELT WARNING LIGHT


    1. Check the operation of the rear seat belt warning light.

      Click here

      Result
      Proceed to
      The rear seat belt warning light operates normally.
      The rear seat belt warning light operates abnormally.

    The rear seat belt warning light operates normally.

    END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) Click here

    The rear seat belt warning light operates abnormally.

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

  6. INSPECT TELLTALE LIGHT ASSEMBLY


    1. Remove the telltale light assembly.

      Click here

    2. Inspect the telltale light assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the G43 telltale light assembly connector.

    2. Disconnect the G16 combination meter assembly meter connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G43-22 (RLID) - G16-14 (RLMT) Always Below 1 Ω
      G43-23 (RCID) - G16-19 (RCMT)
      G43-24 (RRID) - G16-3 (RRMT)
      G43-22 (RLID) - Body ground Always 10 kΩ or higher
      G43-23 (RCID) - Body ground
      G43-24 (RRID) - Body ground
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT REAR SEAT INNER BELT ASSEMBLY


    1. for LH, RH:

      Remove the rear seat inner belt assembly.

      Click here

    2. for Center:

      Remove the rear center lap type seat belt assembly RH.

      Click here

    3. for LH, RH:

      Inspect the rear seat inner belt assembly.

      Click here

    4. for Center:

      Inspect the rear center lap type seat belt assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG (for LH)
      NG (for Center)
      NG (for RH)

    NG (for LH)

    REPLACE REAR SEAT INNER BELT ASSEMBLY LH Click here

    NG (for Center)

    REPLACE REAR CENTER LAP TYPE SEAT BELT ASSEMBLY RH Click here

    NG (for RH)

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (REAR SEAT INNER BELT ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the M12*1, M13*2 or M14*3 rear seat inner belt assembly connector.


      • *1: for RH

        *2: for Center

        *3: for LH

    2. Disconnect the G16 combination meter assembly connector.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      M14-1 - G16-24 (RLSB) Always Below 1 Ω
      M14-2 - Body ground
      M14-1 - Body ground Always 10 kΩ or higher
      for Center
      Tester Connection Condition Specified Condition
      M13-1 - G16-25 (RCSB) Always Below 1 Ω
      M13-2 - Body ground
      M13-1 - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      M12-1 - G16-26 (RRSB) Always Below 1 Ω
      M12-2 - Body ground
      M12-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR