SEAT BELT WARNING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use this procedure to troubleshoot the seat belt warning system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS


    1. Interview the customer to confirm the trouble Click here.


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  3. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage
      11 to 14 V

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


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  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the CAN communication system is functioning normally Click here.

      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. CHECK DTC OUTPUT (AIRBAG SYSTEM)*


    1. Clear the DTCs Click here.

    2. Recheck for DTCs Click here.

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

      B

      GO TO AIRBAG SYSTEM Click here

      A

  6. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table Click here.

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

      B

      GO TO STEP 8
      A

  7. 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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  8. REPAIR OR REPLACE


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  9. CONFIRMATION TEST


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    END