2002 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

NOTE: Initial condition that the customizing function is not chosen by LEXUS hand-held tester is shown.
  1. CHECK BASIC FUNCTION (MANUAL OPERATION FUNCTION) 
    1. Turn the ignition switch ON.
    2. Check that the door glass moves up when each window switch of the regulator master switch assembly is turned UP and moves down when each window switch is turned DOWN.
    3. Check that the door glass moves up when the window switch of each regulator switch assembly is turned UP and moves down when the window switch is turned DOWN.
    4. Check that the door glasses other than the driver's door glass do not operate when the window lock switch is turned LOCK.
  2. CHECK AUTOMATIC OPERATION FUNCTION 
    1. Turn the ignition switch ON.
    2. Check that the AUTO UP operates and the door glass is fully closed when each window switch of the regulator master switch assembly is turned UP by double-shift.
    3. Check that the AUTO DOWN operates and the door glass is fully opened when each window switch of the regulator master switch assembly is turned DOWN by double-shift.
    4. Check that the AUTO UP operates and the door glass is fully closed when the window switch of each regulator switch assembly is turned UP by double-shift.
    5. Check that the AUTO DOWN operates and the door glass is fully opened when the window switch of each regulator switch assembly is turned DOWN by double-shift.
    6. Check that the door glass stops when the applicable switch is turned UP during the AUTO DOWN operation. (However, if the switch is kept in the UP side, it will transfer to the manual operation.)
    7. Check that the door glass stops when the applicable switch is turned DOWN during the AUTO UP operation. (However, if the switch is kept in the DOWN side, it will transfer to the manual operation.)
  3. CHECK OPERATION FUNCTION AFTER KEY-OFF 
    1. After turning the ignition switch from ON to OFF, check that each door glass can be operated via the switch of the regulator master switch assembly, and check that the operation becomes impossible once the driver's door is opened then closed.
    2. When approximately 45 seconds have elapsed after the ignition switch is turned from ON to OFF, check that the window switch of the regulator master switch assembly will be unable to operate the door glass.
    3. After turning the ignition switch from ON to OFF with the driver's door open, check that the AUTO UP or DOWN operation keeps working to the fully-closed or fully-opened position even if the door is closed during the AUTO operation. Also, check that the power window operation becomes impossible after the operations have done.
  4. CHECK WIRELESS OPERATION 
    1. With all the doors closed, have no key inserted in the ignition key cylinder.
    2. Check that each door glass moves down when the UNLOCK switch of the transmitter is kept pressing for 2.5 seconds or more. Also, check that the door glass stops when the UNLOCK switch is turned off.
    3. Check that each door glass moves up when the LOCK switch of the transmitter is kept pressing for 2.5 seconds or more. Also, check that the door glass stops when the LOCK switch is turned off.
  5. CHECK OPERATION FUNCTION BY DRIVER'S DOOR KEY OPERATION (OPERATION INTERLOCKED WITH KEY) 
    1. Check that each door glass moves down when the door lock cylinder is held in the UNLOCK position for 2 seconds or more by the key operation. Also, check that the door glass stops when the door lock cylinder is turned back to the neutral position.
    2. Check that each door glass moves up when the door lock cylinder is held in the LOCK position for 2 seconds or more by the key operation. Also, check that the door glass stops when the door lock cylinder is turned back to the neutral position.
  6. CHECK JAM PROTECTION FUNCTION 
    NOTE:
    • Never check it with any part of your body such as hand caught between the glass and the vehicle's body. Also, pay thorough attention not to get caught in there during the operation.
    • In case of resetting the power window regulator motor assembly, check should be carried out after repeating to raise and lower the door glass several times by the AUTO operation.
Chapter Navigation
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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.