2010 Lexus IS 250C AutomaticFACTORY OEM SERVICE PROCEDURE

Auto Up Operation does not Fully Close Power Window (Jam Protection Function is Activated): Procedure

  1. PERFORM INITIALIZATION (POWER WINDOW CONTROL SYSTEM (APPLICABLE LOCATION)) 
    1. Initialize the power window control system (applicable location). Refer to INITIALIZATION .

    NEXT: Go to next step 

  2. CHECK AUTO UP / DOWN FUNCTION 
    1. Check that the auto up* and down function using the power window regulator master switch assembly and power window regulator switch assembly operates the power windows. Refer to OPERATION CHECK .

      OK

      Auto up* and down function operates normally.

      *: w/ Front Passenger Door Auto Up Function

    NG → See step   3 

    OK → END (INITIALIZATION WAS DEFECTIVE) 

  3. CHECK WINDOW GLASS SLIDING MOVEMENT (APPLICABLE LOCATION) 
    1. Remove the window regulator.
    2. Install the window glass onto the door glass run.
    3. Check if the door window regulator operates smoothly.
    4. Check that the window glass slides smoothly when sliding it up by hand.

      OK

      Door window glass slides smoothly.

      HINT: 

      Ensure the following:

      • The window glass fits with the glass run without improper contact.
      • Neither deformation nor foreign objects are in the glass run.
      WARNING:

      Perform initialization again.

      Result

      Result Proceed to
      NG A
      OK (Driver door window) B
      OK (Front passenger door window)* C

      *: w/ Front Passenger Door Auto Up Function

    C → See step   5 

    B → See step   4 

    A → FIT WINDOW GLASS CORRECTLY (REMOVE FOREIGN OBJECTS CAUSING IMPROPER FITTING OR REPLACE PARTS) 

  4. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY. Refer to  REMOVAL 
  5. REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY. Refer to  REMOVAL 
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.