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Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Accessories & Equipment >> Warning Systems >> Seat Belt Warning System - Diagnostics & Symptom Tests - (Hybrid) >> Seat Belt Warning System >> Symptom Tests >> Driver Side Seat Belt Warning Light does not Operate [02/2014 - ] >> Procedure

Driver Side Seat Belt Warning Light does not Operate [02/2014 - ]: Procedure

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

      Refer to DTC CHECK / CLEAR [02/2014 - ]

      Body Electrical > SRS Airbag > Clear DTCs 

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [02/2014 - ]

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

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

    Result:  3

    B 

    GO TO AIRBAG SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2014 - ] 

    Result:  1

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / SRS Airbag / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > SRS Airbag > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Left side Buckle SW LH buckle switch Unset, Set or NG Unset: Seat belt not fastened
      Set: Seat belt fastened
      NG: Data is not determined
      -

      Body Electrical > SRS Airbag > Data List 

      Tester Display
      Left side Buckle SW

      Result

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

    Result:  2

    B 

    REPLACE FRONT SEAT INNER BELT ASSEMBLY LH 

    for Manual Seat: Refer to REMOVAL [02/2014 - 11/2016] Refer to REMOVAL [11/2016 - ]

    for Power Seat: Refer to REMOVAL [02/2014 - ]

    Result:  5

    C 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [02/2014 - ] 

    Result:  1

    A 

    See step  3

  3. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Temporarily replace the main body ECU (multiplex network body ECU) with a new or known good one.

      Refer to REMOVAL [02/2014 - 11/2016] Refer to REMOVAL [11/2016 - ]

    NEXT 

  4. CHECK SEAT BELT WARNING LIGHT 
    1. Check the operation of the seat belt warning light.

      Refer to ON-VEHICLE INSPECTION [02/2014 - 11/2016] Refer to ON-VEHICLE INSPECTION [11/2016 - ] 

      OK

      The seat belt warning light operates normally.

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

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

    Result:  2

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2014 - ]