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SEAT BELT WARNING SYSTEM Driver Side Seat Belt Warning Light does not Operate

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DTC Code DTC Name
  Driver Side Seat Belt Warning Light does not Operate
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DESCRIPTION

The combination meter assembly illuminates, blinks or turns off the seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly (driver seat).

Tip:

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

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WIRING DIAGRAM

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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).

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

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PROCEDURE


  1. Click here

    CHECK DTC OUTPUT (AIRBAG SYSTEM)


    1. Clear DTCs (Click here).

    2. Recheck for DTCs (Click here).

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

  2. Click here

    READ VALUE USING GTS


    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 / SRS Airbag / Data List.

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

      Table 1. SRS Airbag
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Left side Buckle SW*1 LH buckle switch/Unset, Set or NG

      Unset: Seat belt not fastened

      Set: Seat belt fastened

      NG: Data is not determined

      		 -
      Right side Buckle SW*2 RH buckle switch/Unset, Set or NG

      Unset: Seat belt not fastened

      Set: Seat belt fastened

      NG: Data is not determined

      		 -

      • *1: for LHD

      • *2: for RHD

      Table 2. Result
      Result Proceed to
      Unset or Set is displayed on the GTS screen according to the driver seat belt condition A
      Unset or Set is not displayed normally on the GTS screen according to the driver seat belt condition B
      NG is displayed on the GTS screen C

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    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Replace the main body ECU (multiplex network body ECU) (Click here).


  4. Click here

    CHECK SEAT BELT WARNING LIGHT


    1. Check the operation of the seat belt warning light (Click here).

      OK
      The seat belt warning light operates normally.

    • OK

      END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

    • NG

      REPLACE COMBINATION METER ASSEMBLY (Click here)