KEY REMINDER WARNING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedures to troubleshoot the key reminder warning system.

  • The intelligent tester should be used in steps 4 and 6.


  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 in the problem analysis:

      What Vehicle model, system name
      When Date, time, occurrence frequency
      Where Road conditions
      Under what conditions? Driving conditions, weather conditions
      How did it happen? Problem symptoms

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  3. INSPECT BATTERY VOLTAGE


    1. Measure the 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. 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
      (ECU connected, communication line malfunctioning) DTC is not output. A
      (ECU connected, communication line malfunctioning) DTC is output.

      B

      Click here


      B

      GO TO CAN COMMUNICATION SYSTEM
      A

  5. 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 7
    A

  6. OVERALL ANALYSIS AND TROUBLESHOOTING


    1. DATA LIST / ACTIVE TEST Click here

    2. TERMINALS OF ECU Click here


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  7. REPAIR OR REPLACE


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  8. CONFIRMATION TEST


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    END