NAVIGATION SYSTEM (for Radio and Display Type) > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here


HINT:
  1. Use the following procedure to troubleshoot the navigation system.
  2. *: Use the GTS.


1.VEHICLE BROUGHT TO WORKSHOP

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    2.CUSTOMER PROBLEM ANALYSIS
      1. When troubleshooting, check 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.
      2. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
      3. 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?
        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

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

    NEXT


    4.CHECK CABIN
    1. Check that condensation is not likely to occur in the cabin and that the temperature is not high or extremely low in the cabin.

      OK:
      Condensation is not likely being produced and the temperature is not high or extremely low.

      HINT:
      1. A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
      2. The navigation system may not operate normally when the temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher.


    NG.
    SET CABIN TO APPROPRIATE TEMPERATURE
    OK


    5.CHECK NAVIGATION SYSTEM NORMAL CONDITION
    1. Refer to Check System Normal Condition in Operation Check (Click here).

      Result:
      Result
      Proceed to
      Symptom is not normal operation.
      A
      Symptom is normal operation.
      B


    B.
    END
    A


    6.CHECK CAN COMMUNICATION SYSTEM*
    1. Check if CAN communication system DTCs are output (Click here).

      Result:
      Result
      Proceed to
      CAN DTCs are not output.
      A
      CAN DTCs are output.
      B


    B.
    GO TO CAN COMMUNICATION SYSTEM (Click here)
    A


    7.CHECK FOR DTC*
    1. Refer to DTC Check / Clear (Click here).

      Result:
      Result
      Proceed to
      DTCs are output.
      A
      DTCs are not output.
      B


    B.
    Go to step 11
    A


    8.DTC CLEAR*
    1. Refer to DTC Check / Clear (Click here).

      HINT:
      The present DTCs may not indicate actual malfunctions depending on the vehicle operating conditions.

    NEXT


    9.RECHECK FOR DTC*
    1. Refer to DTC Check / Clear (Click here).

      Result:
      Result
      Proceed to
      DTCs are output.
      A
      DTCs are not output.
      B

      HINT:
      1. Even if the problem symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.
      2. If more information is needed, perform a recheck using the "System Check Mode" screen after rechecking for DTCs using the GTS.
      3. Check for DTCs and inspect the area that the code indicates.


    B.
    Go to step 11
    A


    10.DIAGNOSTIC TROUBLE CODE CHART
    1. Find the output code in Diagnostic Trouble Code Chart (Click here).


    NEXT

    Go to step 13


    11.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

      HINT:
      If the symptom does not recur and no DTCs are output, attempt to reproduce the symptoms (Click here).


    B.
    Go to step 13
    A


    12.PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM
    1. Refer to Terminals of ECU (Click here).


    NEXT


    13.CHECK CIRCUIT
    1. Adjust, repair or replace as necessary.


    NEXT


    14.RECHECK FOR DTC*
    1. After clearing DTCs, recheck for DTCs (Click here).


    NEXT


    15.PERFORM CONFIRMATION TEST

      NEXT

      END