LIN COMMUNICATION SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the LIN communication system.


  • *: Use the intelligent tester.


  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 in the problem analysis:

    What Vehicle, 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.


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  4. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Using the intelligent tester, inspect the LIN communication function to ensure there are no malfunctions in the communication system Click here.

      Result
      Result Proceed to
      No DTCs output A
      DTCs output B

      B

      GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

      A

  5. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Terminals of ECU Click here.


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  6. REPAIR OR REPLACE


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  7. CONFIRMATION TEST


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    END