LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2012 >> IS F >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System (Diagnostics & Symptom Tests) >> Power Window Control System >> Symptom Tests >> Key-off Operation Function Operates even if Operating Conditions are not Satisfied >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Key-off Operation Function Operates even if Operating Conditions are not Satisfied: Procedure

  1. CHECK OPERATION FUNCTION AFTER ENGINE SWITCH IS TURNED OFF 
    1. Check the power window operation function after the engine switch is turned off.

      Result

      Result Proceed to
      When power window can still be operated even after opening driver door or front passenger door within approximately 45 seconds of engine switch being turned off A
      When power window can still be operated even after approximately 45 seconds have elapsed after engine switch is turned off B

    B → REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) 

    A: Go to next step 

  2. READ VALUE USING TECHSTREAM (Main Body) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    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.
      MAIN BODY (MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH))

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door Courtesy SW Driver side door courtesy switch signal / ON or OFF ON: Driver side door open
      OFF: Driver side door closed
      -
      P Door Courtesy SW Front passenger side door courtesy switch signal / ON or OFF ON: Front passenger side door open
      OFF: Front passenger side door closed
      -

      OK

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

    NG → See step   3 

    OK → REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) 

  3. GO TO LIGHTING SYSTEM (Proceed to Door Courtesy Light Switch Circuit). Refer to  Door Courtesy Switch Circuit