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

Tech Tips


  • Use the following procedure to troubleshoot the start function.

  • *: Use the GTS.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS CHECK

    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 Date, time, occurrence frequency
      Where Road conditions
      Under what conditions? Running conditions, driving conditions, weather conditions
      How did it happen? Problem symptoms

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  3. INSPECT BATTERY VOLTAGE

    Standard Voltage
    11 to 14 V

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


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  4. CHECK CAN COMMUNICATION SYSTEM*


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

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

      B

      Go To CAN COMMUNICATION SYSTEM Click here

      A

  5. CHECK LIN COMMUNICATION SYSTEM*


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

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

      B

      Go To LIN COMMUNICATION SYSTEM Click here

      A

  6. CHECK FOR DTC*


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

    2. Clear the DTC.

    3. Recheck for DTCs.

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

      B

      Go To DIAGNOSTIC TROUBLE CODE CHART Click here

      A

  7. INSPECT BASIC OPERATION


    1. Check that the engine starts normally when the engine switch is pushed while the brake pedal is depressed and the shift lever is in P.

    2. Check that the power source mode can be changed by pushing the engine switch.

      Tech Tips

      Without depressing the brake pedal, push the engine switch repeatedly. The power source mode should change from off to on (ACC), to on (IG) and back to off.

      With the brake pedal depressed, push the engine switch. The engine should start regardless of the original power source mode.

      OK
      Engine can start normally.

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  8. PROBLEM SYMPTOMS TABLE

    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 10
    A

  9. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Terminals of ECU Click here

    2. Data List / Active Test Click here


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  10. REPAIR OR REPLACE


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  11. CONFIRMATION TEST


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    END