SEAT BELT WARNING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedures to troubleshoot the seat belt warning system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

    If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.


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  3. CHECK FOR DTC*


    1. Check for DTCs and make a note of any codes that are output.

    2. Clear the DTCs.

    3. Recheck for DTCs. Based on the DTCs output above, try to cause the output of the same CAN communication system DTC or airbag system DTC by simulating the symptoms indicated by the DTC.

      Result
      Result Proceed to
      DTC is not output A
      CAN communication system DTC is output (for LHD with Entry and Start System) B
      CAN communication system DTC is output (for LHD without Entry and Start System) C
      CAN communication system DTC is output (for RHD with Entry and Start System) D
      CAN communication system DTC is output (for RHD without Entry and Start System) E
      Airbag system DTC is output F

      B

      Go to CAN COMMUNICATION SYSTEM (for LHD with Entry and Start System) Click here

      C

      Go to CAN COMMUNICATION SYSTEM (for LHD without Entry and Start System) Click here

      D

      Go to CAN COMMUNICATION SYSTEM (for RHD with Entry and Start System) Click here

      E

      Go to CAN COMMUNICATION SYSTEM (for RHD without Entry and Start System) Click here

      F

      Go to AIRBAG SYSTEM Click here

      A

  4. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table Click here.


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  5. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Operation Check Click here

    2. Data List / Active Test Click here

    3. Terminals of ECU Click here


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  6. REPAIR OR REPLACE


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  7. CONFIRMATION TEST


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    END