POWER WINDOW CONTROL SYSTEM > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here

HINT:

1. Use the following procedure to troubleshoot the power window control system.
   
2. *: Use the intelligent tester.
   

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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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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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1. Use the intelligent tester to check if the CAN communication system is functioning normally.
   

   Result:

   Result	Proceed to
   ECU connected, communication line is functioning normally	A
   ECU connected, communication line is malfunctioning	B

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

1. Use the intelligent tester 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

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

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

1. Operation Check (Click here)
   

2. Data List / Active Test (Click here)
   

3. Terminals of ECU (Click here)
   

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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 11
A

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).
   

   HINT:

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

   *: This function is set through the customize function, as it is off by default.

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