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.
2001 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Driver's Power Window Automatic Function Inoperative
- Attempt key off operation. If key off operation is inoperative, go to step 4. If key off operation is okay, go to next step.
- Turn ignition off. Disconnect master switch and driver's side power window motor harness connector. Check for continuity in White wire between terminal No. 11 of master switch harness connector and terminal No. 9 of driver's side power window motor harness connector. If continuity is present, go to next step. If continuity is not present, repair wire harness. See WIRING DIAGRAMS .
- Reconnect window switch and power window motor harness connectors. Turn ignition on. Measure voltage between ground and terminal No. 9 (White wire) at driver's side power window motor while operating AUTO switch in UP and DOWN positions. If battery voltage is present in both switch positions, replace power window motor assembly. If battery voltage is not present in both switch positions, replace master switch.
- Turn ignition on. Using master switch, fully close driver's window, and then lower 1.969" (50 mm). Attempt key off operation. If key off operation is inoperative, replace master switch. If key off operation is okay, system is okay at this time.
Factory Service Tools
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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.