2009 Lexus LX 570FACTORY OEM SERVICE PROCEDURE

Jam Protection Function does not Operate: Procedure

  1. PERFORM INITIALIZATION 
    1. Initialize the power window regulator motor. Refer to INITIALIZATION .
    2. Check if the power window auto up/down function operates. Refer to OPERATION CHECK .

      OK

      Auto up/down function operates.

    NG → END (PROBLEM DUE TO INITIALIZATION FAILURE) 

    OK: Go to next step 

  2. CHECK JAM PROTECTION FUNCTION OPERATING RANGE 
    1. Check if the jam protection function operates for applicable power window.

      HINT: 

      The jam protection function does not operate from the fully closed position of the door glass to 4 mm (0.157 in.) below that.

      OK

      Jam protection function operates.

      RESULT

      Result Proceed to
      OK A
      NG (Driver side power window) B
      NG (Front passenger side power window) C
      NG (Rear power window LH) D
      NG (Rear power window RH) E

    E → See step   6 

    D → See step   5 

    C → See step   4 

    B → See step   3 

    A → END 

  3. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH. Refer to  REMOVAL 
  4. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH. Refer to  REMOVAL 
  5. REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH. Refer to  REMOVAL 
  6. REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH. 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.