WINDSHIELD DEICER SYSTEM > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here


HINT:
  1. Use the following procedure to troubleshoot the windshield deicer system.
  2. *: Use the intelligent tester.



1.VEHICLE BROUGHT TO WORKSHOP

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    2.CUSTOMER PROBLEM ANALYSIS

      HINT:
      1. 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.
      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 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 AUXILIARY BATTERY VOLTAGE

    1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage:
      11 to 14 V

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


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    4.SYSTEM CHECK

    1. Check the vehicle specification.

      Result:
      Result
      		Proceed to
      w/ Navigation System
      		A
      w/o Navigation System
      		B



    		B.
    Go to step 7
    A


    5.CHECK COMMUNICATION FUNCTION OF AVC-LAN COMMUNICATION*

    1. Check the AVC-LAN communication function to ensure there are no malfunctions in the communication system (Click here for Navigation System (for HDD), Click here for Navigation System (for DVD)).

      Result:
      Result
      		Proceed to
      DTC is not output.
      		A
      DTC is output (for Navigation System (for HDD))
      		B
      DTC is output (for Navigation System (for DVD))
      		C



    		B.
    GO TO NAVIGATION SYSTEM (for HDD) (Click here)

    		C.
    GO TO NAVIGATION SYSTEM (for DVD) (Click here)
    A


    6.CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

    1. Check the CAN communication function to ensure there are no malfunctions in the communication system.

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



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


    7.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



    		B.
    Go to step 9
    A


    8.OVERALL ANALYSIS AND TROUBLESHOOTING*

    1. Terminals of ECU (Click here)

    2. Data List / Active Test (Click here)


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    9.REPAIR OR REPLACE

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      10.CONFIRMATION TEST

        NEXT

        END