SEAT BELT WARNING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


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

  • *: Using 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.


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  3. CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)*


    1. Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally Click here.

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

      B

      GO TO MULTIPLEX COMMUNICATION SYSTEM Click here

      A

  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM (CAN)*


    1. Use the intelligent tester to check if the CAN Communication System (CAN) is functioning normally.

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

      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  5. PROBLEM SYMPTOMS TABLE

    Result
    Result Proceed to
    Fault is not listed in problem symptoms table A
    Fault is listed in problem symptoms table B

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  6. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List/Active Test Click here.

    2. Terminals of ECU Click here.

    3. On-vehicle Inspection Click here.


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  7. REPAIR OR REPLACE


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  8. CONFIRMATION TEST


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    END