POWER WINDOW CONTROL SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the power window control system.

  • *: Use the Techstream.


  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 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. PRE-CHECK


    1. Measure the auxiliary battery voltage.

      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.

    2. Check the fuses and relays.

    3. Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.


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  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Using the Techstream, check for CAN communication system DTCs 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

  5. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Using the Techstream, check for LIN communication system DTCs Click here.

      Result
      Result Proceed to
      LIN DTCs are not output A
      LIN DTCs are output B

      B

      GO TO LIN COMMUNICATION SYSTEM Click here

      A

  6. CHECK FOR DTC*


    1. Check for DTCs and make a note of any codes that are output Click here.

    2. Clear the DTCs.

    3. Recheck for DTCs.

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

      B

      GO TO DIAGNOSTIC TROUBLE CODE CHART 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 10
      A

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Operation Check Click here

    2. Terminals of ECU Click here

    3. Data List / Active Test Click here

    4. Fail-safe Chart Click here

    5. Inspection


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  9. ADJUST, REPAIR OR REPLACE


    1. Check if any of the front door window regulators, power window regulator motor assembly (for driver door) or power window regulator motor assembly (for front passenger door), door glass or door glass runs have been removed and reinstalled.

      Result
      Result Proceed to
      Any of the door window regulators, power window regulator motor assembly (for driver door) or power window regulator motor assembly (for front passenger door), door glass or door glass runs have been removed and reinstalled A
      The door window regulators, power window regulator motor assembly (for driver door) or power window regulator motor assembly (for front passenger door), door glass and door glass runs have not been removed and reinstalled B

      B

      Go to step 12
      A

  10. INITIALIZE POWER WINDOW CONTROL SYSTEM


    1. If any of the front door window regulators, power window regulator motor assembly (for driver door) or power window regulator motor assembly (for front passenger door), door glass or door glass runs have been removed and reinstalled, perform "Initialize Power Window Control System" for the applicable door glass Click here.


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  11. CONFIRMATION TEST


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    END