THEFT DETERRENT SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the theft deterrent system.

  • *: Use the intelligent tester.

  • Troubleshooting of the theft deterrent system is based on the premise that the door lock control system, wireless door lock control system, lighting system, horn system, engine immobiliser system and entry and start system (for Entry Function) are operating normally. Check these systems first before troubleshooting the theft deterrent system.


  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. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the CAN communication system 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

  4. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. The theft deterrent system uses the LIN communication system to communicate. Check that the LIN communication system is functioning normally.

      Result
      Result Proceed to
      LIN communication system is normal A
      LIN communication system is malfunctioning B

      B

      GO TO LIN COMMUNICATION SYSTEM Click here

      A

  5. CHECK FOR DTC*


    1. Check for DTCs Click here and note any codes that are output.

    2. Clear the DTCs Click here.

    3. Based on the DTCs output above, try to force output of the same DTC by simulating the symptoms indicated by the DTC. Then recheck for DTCs.

      Result
      Result Proceed to
      DTC output does not reoccur A
      DTC output reoccurs B

      B

      Go to step 8
      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. Inspection


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  8. REPAIR OR REPLACE


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  9. CONFIRMATION TEST


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    END