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

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1. 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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1. PRE-CHECK

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

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

(b) Check the fuses and relays.

(c) 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. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the LIN communication system is functioning normally (See page ).

B

GO TO LIN COMMUNICATION SYSTEM

A

1. CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output (See page ).

(b) Clear the DTCs.

(c) Recheck for DTCs.

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

1. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table (See page ).

B

GO TO STEP 8

A

1. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check (See page )

(b) Data List / Active Test (See page )

(c) Terminals of ECU (See page )

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1. REPAIR OR REPLACE

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1. INITIALIZE POWER WINDOW CONTROL SYSTEM

(a) If any of the door window regulator sub-assemblies, power window regulator motor assemblies, door glass or door glass runs have been removed and reinstalled, perform "Initialize Power Window Control System" for the applicable door glass (See page ).

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1. CONFIRMATION TEST

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END