WINDSHIELD DEICER SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips

Use the following procedure to troubleshoot the windshield deicer system.


  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 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. SYSTEM CHECK


    1. Check the vehicle specification.

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

      B

      Go to step 6
      A

  5. 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

  6. 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 8
      A

  7. OVERALL ANALYSIS AND TROUBLESHOOTING


    1. Terminals of ECU Click here

    2. Data List / Active Test Click here


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  8. REPAIR OR REPLACE


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  9. CONFIRMATION TEST


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    END