How To Proceed With Troubleshooting

WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

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 -- Continue 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:





NEXT -- Continue to next step.

3. 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.
NEXT -- Continue to next step.

4. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*
(a) Use the Techstream to check if the LIN communication system is functioning normally Initial Inspection and Diagnostic Overview.
Result:





B -- GO TO LIN COMMUNICATION SYSTEM
A -- Continue to next step.

5. LIN COMMUNICATION SYSTEM (Check By Power Window Master Switch)
(a) Manually operate power window regulator master switch assembly to confirm front passenger side, rear LH side and rear RH side power window functions Operation Check.
OK:
Front passenger side, rear LH side and rear RH side power window regulator motors operate by power window regulator master switch assembly

NG -- Go to Remote Up / Down Function does not Operate
OK -- Continue to next step.

6. CHECK FOR DTC*
(a) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.
(b) Clear the DTCs.
(c) Recheck for DTCs.
Result:





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART
A -- Continue to next step.

7. PROBLEM SYMPTOMS TABLE
(a) Refer to Problem Symptoms Table Problem Symptoms Table.
Result:





B -- Go to step 9
A -- Continue to next step.

8. OVERALL ANALYSIS AND TROUBLESHOOTING*
(a) Operation Check Operation Check
(b) Data List / Active Test Scan Tool Testing and Procedures
(c) Terminals of ECU Pinout Values and Diagnostic Parameters
NEXT -- Continue to next step.

9. REPAIR OR REPLACE
NEXT -- Continue to next step.

10. RESET POWER WINDOW MOTOR
(a) If the power window regulator master switch assembly or power window regulator switch assembly LED is blinking, reset the power window regulator motor assembly Programming and Relearning.
NEXT -- Continue to next step.

11. CONFIRMATION TEST
NEXT -- END