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Home >> Lexus >> 2023 >> LX 600 Base >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Seat Belt Warning System (W/O Occupant Classification System0 - Diagnostics & Symptom Tests >> SEAT BELT WARNING SYSTEM (w/o Occupant Classification System) >> Driver Side Seat Belt Warning Light does not Operate [12/2021 - ] >> Procedure

Driver Side Seat Belt Warning Light does not Operate [12/2021 - ]: Procedure

  1. READ VALUE USING GTS (DRIVER BUCKLE SWITCH) 
    1. 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
      Driver Buckle Switch Driver side seat belt buckle switch status Fastened or Not Fastened Fastened: Driver side seat belt fastened
      Not Fastened: Driver side seat belt not fastened
      -

      Body Electrical > Combination Meter > Data List 

      Tester Display
      Driver Buckle Switch

      OK

      The GTS display changes correctly in response to the driver seat belt condition.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    See step  2

  2. INSPECT FRONT SEAT BELT SET (FOR DRIVER SIDE) 

    Refer to INSPECTION [12/2021 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT SEAT BELT SET (FOR DRIVER SIDE). Refer to  REMOVAL [12/2021 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (FRONT SEAT BELT SET (FOR DRIVER SIDE) - COMBINATION METER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the S29 front seat belt set (for driver side) connector.
    2. Disconnect the I6 combination meter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      S29-1 (+) - I6-23 (BKL) Always Below 1 Ω
      S29-2 (E) - Body ground Always Below 1 Ω
      S29-1 (+) or I6-23 (BKL) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR