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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Restraints >> Passive Restraints >> Seat Belt Warning System - Diagnostics & Symptom Tests >> Seat Belt Warning System >> Driver Side Seat Belt Warning Light does not Operate [11/2023 - ] >> Procedure

Driver Side Seat Belt Warning Light does not Operate [11/2023 - ]: Procedure

  1. CHECK DTC OUTPUT (AIRBAG SYSTEM) 
    1. Clear the DTCs.

      Body Electrical > SRS Airbag > Clear DTCs 

    2. Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    GO TO AIRBAG SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ] 

    Result: 

    See step  2

  2. READ VALUE USING GTS 
    1. 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
      Driver Seat Buckle Switch Status Driver seat belt buckle switch Unknown, Unbuckle, Buckle, Malfunction Unknown: Data is not determined
      Unbuckle: Front driver seat belt buckle switch unfastened
      Buckle: Front driver seat belt buckle switch fastened
      Malfunction: Front driver seat belt buckle switch is malfunctioning
      -

      Body Electrical > SRS Airbag > Data List 

      Tester Display
      Driver Seat Buckle Switch Status

      Result

      Result Proceed to
      Unset or Set is displayed on the GTS according to the driver seat belt condition A
      Unset or Set is not displayed correctly on the GTS according to the driver seat belt condition B
      NG is displayed on the GTS C

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH 

    for Power Seat: Refer to REMOVAL [11/2023 - ]

    for Manual Seat: Refer to REMOVAL [11/2023 - ]

    Result: 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [11/2023 - ]