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

DESCRIPTION

When the ignition switch is turned to ON, the occupant detection ECU sends a signal to the airbag sensor assembly to indicate the state of the front seat inner belt assembly RH and also whether the front passenger seat is occupied. The airbag sensor assembly sends those signals to the combination meter assembly via CAN communication. The combination meter assembly illuminates, blinks or turns off the front seat belt warning light on the combination meter assembly in accordance with these signals.

Tech Tips

The front seat belt warning light on the combination meter assembly is used for both the driver side seat and front passenger side seat.

WIRING DIAGRAM

A00YUPCE02

CAUTION / NOTICE / HINT

Note

The seat belt warning 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

PROCEDURE


  1. CHECK DTC (OCCUPANT CLASSIFICATION SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Occupant Detection > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Occupant Detection > Trouble Codes
      Result
      Proceed to
      DTCs are not output
      DTCs are output

    DTCs are output

    GO TO OCCUPANT CLASSIFICATION SYSTEM Click here

    DTCs are not output

  2. CHECK DTC (AIRBAG SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTCs are not output
      DTCs are output

    DTCs are output

    GO TO AIRBAG SYSTEM Click here

    DTCs are not output

  3. READ VALUE USING GTS (PASSENGER BUCKLE 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 / Occupant Detection / Data List.

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


      Body Electrical > Occupant Detection > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Passenger Buckle SW Front passenger side buckle switch Set, Unset or NG

      Set: Front seat belt RH fastened

      Unset: Front seat belt RH not fastened

      NG: Data is not determined

      		 -

      Body Electrical > Occupant Detection > Data List
      Tester Display
      Passenger Buckle SW
      Result
      Result Proceed to
      Unset or Set is displayed on the GTS screen according to the front passenger side seat belt condition A
      Unset or Set is not displayed normally on the GTS screen according to the front passenger side seat belt condition B
      NG is displayed on the GTS screen C

    B

    REPLACE FRONT SEAT INNER BELT ASSEMBLY RH Click here

    C

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    A

  4. READ VALUE USING GTS (RIGHT SIDE BUCKLE 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 / SRS Airbag / Data List.

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


      Body Electrical > SRS Airbag > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Right side Buckle SW Front passenger side buckle switch Unset, Set or NG

      Unset: Front seat belt RH is not fastened

      Set: Front seat belt RH is fastened

      NG: Data is not determined

      		 -

      Body Electrical > SRS Airbag > Data List
      Tester Display
      Right side Buckle SW
      Result
      Result Proceed to
      Unset or Set is displayed on the GTS screen according to the front passenger side seat belt condition A

      • Unset or Set is not displayed normally on the GTS screen according to the front passenger side seat belt condition

      • NG is displayed on the GTS screen

      		 B

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here