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.
2003 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Problem Symptoms Table
PROBLEM SYMPTOMS
| Symptom | Suspected Area | See page |
|---|---|---|
| Power seat does not operate | 1. Front power seat switch | INSPECTION |
| 2. PWR SEAT fuse | - | |
| 3. Wire harness | - | |
| Power seat does not slide | 1. Front power seat switch | INSPECTION |
| 2. Front slide power seat motor assy (Slide) | INSPECTION | |
| 3. Wire harness | - | |
| Front vertical of the power seat does not operate (Driver's seat only) | 1. Front power seat switch | INSPECTION |
| 2. Front up, down power seat motor assy (Front vertical) | INSPECTION | |
| 3. Wire harness | - | |
| Rear lifter of the power seat does not operate (Driver's seat only) | 1. Front power seat switch | INSPECTION |
| 2. Power seat motor assy (Rear vertical) | INSPECTION | |
| 3. Wire harness | - | |
| Power seat does not recline | 1. Front power seat switch | INSPECTION |
| 2. Power seat motor assy (Reclining) | INSPECTION | |
| 3. Wire harness | - | |
| Lumber support does not operate (Driver's seat only) | 1. Front power seat switch | INSPECTION |
| 2. Power seat motor assy (Lumber support) | INSPECTION | |
| 3. Wire harness | - |
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.