How To Proceed With Troubleshooting

HINT: 

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

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

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

   NEXT: Go to next step 

3. INSPECT AUXILIARY BATTERY VOLTAGE 
   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.

      NEXT: Go to next step 

4. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the LIN communication system is functioning normally. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .
      RESULT
      
      

      Result	Proceed to
      No DTCs output	A
      DTCs output	B

      B → GO TO LIN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

5. CHECK FOR DTC* 
   1. Check for DTCs and note any codes that are output. Refer to DTC CHECK / CLEAR .
   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. Refer to  DIAGNOSTIC TROUBLE CODE CHART  

      A: Go to next step 

6. PROBLEM SYMPTOMS TABLE 
   1. Refer to PROBLEM SYMPTOMS TABLE .
      RESULT
      
      

      Result	Proceed to
      Fault is not listed in problem symptoms table	A
      Fault is listed in problem symptoms table	B

      B → ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE 

      A: Go to next step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Operation Check. Refer to OPERATION CHECK 
   2. Terminals of ECU. Refer to TERMINALS OF ECU 
   3. Data List / Active Test. Refer to DATA LIST / ACTIVE TEST 

      NEXT: Go to next step 

8. ADJUST, REPAIR OR REPLACE 
   1. Check if the front door window regulator sub-assembly LH, front power window regulator motor assembly LH, door glass or door glass run has been removed and reinstalled.
      RESULT
      
      

      Result	Proceed to
      Front door window regulator sub-assembly LH, front power window regulator motor assembly LH, door glass or door glass run has been removed and reinstalled.	A
      Front door window regulator sub-assembly LH, front power window regulator motor assembly LH, door glass and door glass run have not been removed and reinstalled.	B

      B → Go to step 10 

      A: Go to next step 

9. INITIALIZE POWER WINDOW REGULATOR MOTOR ASSEMBLY 
   1. If a power window regulator master switch assembly LED is blinking, initialize the front power window regulator motor assembly LH. Refer to INITIALIZATION .

      NEXT: Go to next step 

10. CONFIRMATION TEST 

    NEXT → END