2008 Lexus GS 450hFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

  1. PERFORM INITIALIZATION 
    1. Initialize the power window regulator motor assembly (applicable location) (See INITIALIZATION  ).
    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 the applicable power window.

      HINT:

      The jam protection function will not operate within 4 mm (0.157 in) of the fully closed position.

      OK: 

      Jam protection function operates normally. 

      Result 

      RESULT CHART

      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

    B: REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH  (See REMOVAL )

    C: REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH  (See REMOVAL )

    D: REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH  (See REMOVAL )

    E: REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH  (See REMOVAL )

    A: END 

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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.