POWER WINDOW CONTROL SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


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

  • *: Use the GTS.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CUSTOMER PROBLEM ANALYSIS


    • 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. PRE-CHECK


    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.

    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. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Use the GTS to check if the LIN communication system is functioning normally Click here.

      Result
      Result Proceed to
      No DTCs output A
      DTCs output B

      B

      GO TO LIN COMMUNICATION SYSTEM Click here

      A

  5. CHECK FOR DTC*


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

    2. Clear the DTCs.

    3. Recheck for DTCs.

      Result
      Result Proceed to
      No DTCs output A
      DTCs output B

      B

      GO TO DIAGNOSTIC TROUBLE CODE CHART 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. Operation Check Click here

    2. Terminals of ECU Click here

    3. Data List / Active Test Click here


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  8. ADJUST, REPAIR OR REPLACE


    1. Check if any of the door window regulators, power window regulator motor assemblies, 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 assemblies, door glass or door glass runs have been removed and reinstalled. A
      None of the door window regulators, power window regulator motor assemblies, door glass or door glass runs has been removed and reinstalled. B

      B

      Go to step 10
      A

  9. INITIALIZE POWER WINDOW REGULATOR MOTOR


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

      Tech Tips

      If "Initialize Power Window Control System" (initialization of the pulse sensor) has not been performed, the auto operation function, jam protection function, and key-off operation function will not operate or will operate incorrectly.


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  10. CONFIRMATION TEST


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    END