LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2019 >> UX 250h Base >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System (Diagnostic Codes & Symptom Tests) >> Power Window Control System >> Front Passenger Side Power Window does not Operate with Front Passenger Side Power Window Switch [10/2018 - 07/2022] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Front Passenger Side Power Window does not Operate with Front Passenger Side Power Window Switch [10/2018 - 07/2022]: Procedure

  1. READ VALUE USING TECHSTREAM (MAIN BODY) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Communication P-Door Motor Connection status between power window regulator motor assembly (for front passenger door) and main body ECU (multiplex network body ECU) STOP or OK STOP: Communication stopped
      OK: Normal communication
      -

      Body Electrical > Main Body > Data List 

      Tester Display
      Communication P-Door Motor

      OK

      OK is displayed for each Data List item above.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO LIN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] 

    Result: 

    OK 

    See step  2

  2. READ VALUE USING TECHSTREAM (P-DOOR MOTOR) 
    1. Enter the following menus: Body Electrical / P-Door Motor / Data List.
    2. Read the Data List according to the display on the Techstream.

      Body Electrical > P-Door Motor > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      P Door P/W Up SW Front passenger door power window manual up switch signal OFF or ON OFF: Front passenger door power window manual up switch not being operated
      ON: Front passenger door power window manual up switch being operated
      -
      P Door P/W Down SW Front passenger door power window manual down switch signal OFF or ON OFF: Front passenger door power window manual down switch not being operated
      ON: Front passenger door power window manual down switch being operated
      -

      Body Electrical > P-Door Motor > Data List 

      Tester Display
      P Door P/W Up SW
      P Door P/W Down SW

      OK

      On the Techstream screen, ON or OFF is displayed accordingly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  4

    Result: 

    OK 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM (P-DOOR MOTOR) 
    1. Enter the following menus: Body Electrical / P-Door Motor / Active Test.
    2. Perform the Active Test according to the display on the Techstream.
      WARNING:

      Be careful to avoid injuries as this test causes vehicle parts to move. During the Active Test, the jam protection function will not operate.

      Body Electrical > P-Door Motor > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Power Window Power window OFF / DOWN / UP -

      Body Electrical > P-Door Motor > Active Test 

      Tester Display
      Power Window

      OK

      Front passenger door power window operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [10/2018 - 07/2022] 

    Result: 

    NG 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR). Refer to  REMOVAL [10/2018 - 07/2022] 

  4. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY 
    1. Remove the power window regulator switch assembly.

      Refer to REMOVAL [10/2018 - ]

    2. Inspect the power window regulator switch assembly.

      Refer to INSPECTION [10/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY. Refer to  REMOVAL [10/2018 - ] 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY [FOR FRONT PASSENGER DOOR] - BODY GROUND) 
    1. Disconnect the J2 power window regulator motor assembly (for front passenger door) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J10-5 (UP) - J2-10 (UP1) Always Below 1 Ω
      J10-5 (UP) or J2-10 (UP1) - Body ground Always 10 kΩ or higher
      J10-4 (DOWN) - J2-7 (DWN1) Always Below 1 Ω
      J10-4 (DOWN) or J2-7 (DWN1) - Body ground Always 10 kΩ or higher
      J10-7 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR). Refer to  REMOVAL [10/2018 - 07/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR