How To Proceed With Troubleshooting

HINT:

• Use the following procedure to troubleshoot the power window control system.
• The Techstream should be used in steps  4,  5 and  7.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS CHECK 
   • 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:
     PROBLEM ANALYSIS CHART
     
     

     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

3. INSPECT BATTERY VOLTAGE 
   1. Measure the battery voltage.

      Standard voltage: 

      11 to 14 V 

      If the voltage is below 11V, recharge or replace the battery before proceeding to the next step.

4. INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      MPX DTC is not output	A
      MPX DTC is output	B

   B: GO TO MULTIPLEX COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

   A: Go to next step 

5. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output (See DTC CHECK / CLEAR  ).
   2. Delete DTCs.
   3. Recheck for DTCs.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      No DTCs output	A
      DTCs output	B

   B:  GO TO DIAGNOSTIC TROUBLE CODE CHART 

   A: Go to next step 

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

      Result 

      RESULT CHART
      
      

      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: Go to next step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. Operation Check (See OPERATION CHECK  )
   2. Data list/Active test (See DATA LIST / ACTIVE TEST  )
   3. Terminals of ECU (See TERMINALS OF ECU  )
8. ADJUST, REPAIR OR REPLACE 
9. RESET POWER WINDOW MOTOR 
   1. If the power window master switch AUTO light is blinking, reset the power window regulator motor (See INITIALIZATION  ).
10. CONFIRMATION TEST 

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