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

Tech Tips


  • Use these procedures to troubleshoot the smart entry and start system (for Entry Function).

  • *: Use the GTS.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS

    Tech Tips


    • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.

    • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

    • The following 5 items are important points for problem analysis:

      What? Vehicle model, system name
      When? Did it occur recently or for a long time?
      Where? Does it occur at specified place?
      Under what conditions? Unlock/lock the door, engine switch on (IG), engine start.
      How did it happen? Problem symptoms*

      • *: Be sure to ask the customer in detail about the following points concerning the vehicle operating conditions, environment and problem, and then check for DTCs.


        1. If the entry lock/unlock function does not operate for all doors.

        2. If the entry lock function does not operate.

        3. If the entry unlock function does not operate.

        4. If both the entry lock and unlock functions do not operate.

        5. If the wireless lock and unlock functions do not operate.

        6. If there is no power even when the engine switch is pressed (does not turn on [ACC]).

        7. If the engine does not start with the push start function.

        8. If the wireless answer-back buzzer and outside warning buzzers do not sound.

        9. If an engine start was attempted by holding the electrical key transmitter sub-assembly near the engine switch and then pressing the engine switch.

        10. If the interior warning buzzers do not sound.

        11. Any other details concerning the problem.

      • If it is suspected that wave interference is likely, be sure to ask the customer in detail about the following points concerning the vehicle operating conditions, environment and problem.


        1. Specific locations where the system does not operate (such as near TV towers, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc.).

        2. Specific times when the system does not operate:

          Whether or not symptoms occurred immediately after purchase or only recently.

          Whether or not the symptoms occurred when the electrical key transmitter sub-assembly was near the vehicle (electrical key antenna).

        3. If the system does not operate only when near specific vehicles (there may be wave interference from the wireless systems of other vehicles).

        4. If the system operates intermittently.

        5. If the electrical key transmitter sub-assembly is bundled together with other items.

        6. If the electrical key transmitter sub-assembly is carried together with other electronic devices, such as cell phones, personal computers, portable music players, other electrical key transmitter sub-assemblies, etc. (keep the electrical key transmitter sub-assembly at least 0.1 m (0.328 ft.) away from such items).

        7. Where the electrical key transmitter sub-assembly is being kept when not in use:

          Whether or not the electrical key transmitter sub-assembly being placed within 1 m (3.28 ft.) of items such as TVs, DVD recorders, induction cookers, rice cookers, dishwashers, modems, cell phones, personal computers, microwave ovens, desk or floor lamps, cordless telephones, etc.

        8. If there are electronic devices that transmit electric waves placed in the vehicle.

        9. When the transmitter battery was last replaced.

          The transmitter battery can be checked roughly using the "Key Low Battery" item in the Data List Click here.

        10. If the steering does not unlock.

        11. If the customer installed any optional components (theft deterrent devices, wireless fog lights, etc.) to the vehicle.


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  3. INSPECT BATTERY VOLTAGE


    1. Measure the vehicle battery voltage.

      Standard voltage
      11 to 14 V

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


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  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Use the GTS 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
      A
  5. CHECK METER / GAUGE SYSTEM*


    1. Use the GTS to check if the meter/gauge system is functioning normally.

      Tech Tips

      If the certification ECU (smart key ECU assembly) mistakenly receives a vehicle speed signal, communication between the vehicle and the GTS fails. Be sure to check "Vehicle Speed Meter" displayed on the Data List to make sure that the vehicle speed is not abnormal.

      Result
      Result Proceed to
      No vehicle speed signal is mistakenly received A
      A vehicle speed signal is mistakenly received B

      B
      A
  6. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Use the GTS to check if the LIN communication system is functioning normally Click here.

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

      B
      A
  7. CHECK FUNCTION OF WIRELESS DOOR LOCK CONTROL SYSTEM*


    1. Use the GTS to check if the wireless door lock control system is functioning normally Click here.

      Result
      Result Proceed to
      Wireless door lock control system DTC is not output A
      Wireless door lock control system DTC is output B

      B
      A
  8. CHECK FOR DTC*


    1. Recheck for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      Steering lock system DTC is output B
      Immobiliser system DTC is output C
      Smart entry and start system (for Entry Function) DTC is output D

      B
      C
      D
      A
  9. 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
      A
  10. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Operation Check Click here.

    2. Check Data List / Active Test Click here.

    3. Check Terminals of ECU Click here.


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  11. REPAIR OR REPLACEMENT


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  12. CHECK FOR DTC*


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure Click here.

      Result
      Result Proceed to
      DTC is not output A
      Smart entry and start system (for Entry Function) DTC is output B

      B
      A