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How To Proceed With Troubleshooting [08/2019 - ]: Procedure

  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. CUSTOMER PROBLEM ANALYSIS CHECK 

    HINT: 

    • 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, whether the problem occurred recently or has been occurring for a long time
    Where Whether the problem occurs at a specific location
    Under what conditions? Whether the doors were locked or unlocked, whether the engine switch was on (IG), whether the engine has started
    How did it happen? Problem symptoms

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  3

  3. READ AND SAVE OPERATION HISTORY 
    NOTE:
    • If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read out and saved, the operation history information could be lost.
    • The function "Read operation history" uses the current system time setting inside the Techstream and the time counter inside the controlling ECU to calculate the timings shown in the operation history. For this reason, before reading out the operation history, first make sure that the Techstream system clock is accurately set to the current time.
    1. Read and save operation history using the Techstream.

      Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2019 - ] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. INSPECT BATTERY VOLTAGE 

    Standard voltage

    11 to 14 V

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

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
    1. Use the Techstream to check if the CAN communication system is functioning normally.

      Refer to DIAGNOSIS SYSTEM [08/2019 - 08/2020] , or refer to DIAGNOSIS SYSTEM [08/2020 - 08/2021] , or refer to DIAGNOSIS SYSTEM [08/2021 - ]

      Result

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

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

    Result: 

    A 

    See step  6

  6. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
    1. Check if the LIN communication system is functioning normally.

      Refer to DTC CHECK / CLEAR [08/2019 - ]

      Result

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

    Result: 

    B 

    GO TO LIN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

    Result: 

    A 

    See step  7

  7. CHECK FOR DTC* 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2019 - ] 

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2019 - ] 

    3. Recheck for DTCs.

      Refer to DTC CHECK / CLEAR [08/2019 - ] 

      Result

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

    Result: 

    B 

    GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DTC B1243: GSW Terminal Circuit Malfunction [08/2019 - ] 

    Result: 

    A 

    See step  8

  8. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table.

      Refer to PROBLEM SYMPTOMS TABLE [08/2019 - ] 

      Result

      Result Proceed to
      Fault is not listed in Problem Symptoms Table (Fault can be simulated) A
      Fault is not listed in Problem Symptoms Table (Fault cannot be simulated) B
      Fault is listed in problem symptoms table C

    Result: 

    B 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [08/2019 - ] 

    Result: 

    C 

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE 

    Result: 

    A 

    See step  9

  9. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Operation Check.

      Refer to OPERATION CHECK [08/2019 - ] 

    2. Terminals of ECU.

      Refer to TERMINALS OF ECU [08/2019 - ] 

    3. Data List / Active Test.

      Refer to DATA LIST / ACTIVE TEST [08/2019 - ] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  10

  10. REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  11

  11. CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END 

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