Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Power Window Control System
- Check the basic function of the manual operation function:
- Turn the ignition switch ON. Check that the door glass moves up when each window switch of the driver side regulator master switch assembly is turned to UP and moves down when each window is turned to DOWN.
- Check that the door glass moves up when each window switch of the passenger side regulator switch assembly is turned to UP and moves down when each window is turned to DOWN.
- Check that the other doors glass, besides the driver's, will not operate when locking the window locking switch.
- Check the automatic operation function:
- Turn the ignition switch ON. Check that the AUTO UP operates and the door glass is fully closed when each window switch of the driver side regulator master switch assembly is turned UP by double-shift.
- Check that the AUTO DOWN operates and the door glass is fully opened when each window switch of the driver side regulator master switch assembly is turned DOWN by double-shift.
- Check that the AUTO UP operates and the door glass is fully closed when the window switch of each passenger side regulator switch assembly is turned UP by double-shift.
- Check that the AUTO DOWN operates and the door glass is fully opened when the window switch of each passenger regulator switch assembly is turned DOWN by double-shift.
- 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 position, it will transfer to the manual operation.
- 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 position, it will transfer to the manual operation.
- Check the wireless operation. With all of the doors closed, have no key inserted in the ignition key cylinder. 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.
- Check the operation function by operating the driver's door key operation (operation interlocked with key). Check that each door glass moves down when the door lock cylinder is held in the UNLOCK position for 2.5 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.
CAUTION:
Never check it with any part of your body such as a hand is caught between the glass and the vehicle's body. Also, pay thorough attention not to get caught in there during operation.
Factory Service Tools
Use the Manual With the Right Hardware
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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.