2009 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE

Jam Protection Function does not Operate: Procedure

  1. PERFORM INITIALIZATION 
    1. Initialize the power window regulator motor assembly.
    2. Check if the power window AUTO UP/DOWN function operates normally.

      OK

      AUTO UP/DOWN function operates normally.

    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 normally 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 normally.

      RESULT:

      Result Proceed to
      OK A
      NG (Front LH side power window) B
      NG (Front RH side power window) C
      NG (Rear LH side power window) D
      NG (Rear RH side power window) 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 
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.