ENTRY AND START SYSTEM (for Entry Function) HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the entry and start 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.


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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
      A
  4. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the LIN communication system is functioning normally.

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

      B
      A
  5. CHECK FOR DTC*


    1. Check for DTCs. Based on the DTCs output, try to cause the same steering lock system DTC or engine immobiliser system DTC to be stored by simulating the symptoms indicated by the DTC.

      Result
      Result Proceed to
      DTC is not output A
      Steering lock system DTC is output B
      Engine immobiliser system DTC is output C

      B
      C
      A
  6. PROBLEM SYMPTOMS TABLE


    1. Refer to the 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
      A
  7. 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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  8. REPAIR OR REPLACEMENT


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  9. CONFIRMATION TEST


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