POWER WINDOW CONTROL SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

VEHICLE BROUGHT TO WORKSHOP

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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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PRE-CHECK

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

   Standard Voltage
   11 to 14 V

   If the voltage is below 11 V, recharge or replace the 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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INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

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

INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

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

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

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

OVERALL ANALYSIS AND TROUBLESHOOTING*

1. Operation Check Click here

2. Data List / Active Test Click here

3. Terminals of ECU Click here

   
   

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ADJUST, REPAIR OR REPLACE

1. Check if any of the door window regulators or power window regulator motor assemblies have been removed and reinstalled.

   Result
   Result Proceed to Any of the door window regulators or power window regulator motor assemblies have been removed and reinstalled. A None of the door window regulators or power window regulator motor assemblies has been removed and reinstalled. B

   
   

   B

   Go to step 11

   A

INITIALIZE POWER WINDOW REGULATOR MOTOR

1. If any of the door window regulators or power window regulator motor assemblies 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, key-linked operation function, wireless transmitter-linked operation function and key-off operation function will not operate or will operate incorrectly.

   
   

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CONFIRMATION TEST

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