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.
2009 Lexus ES 350FACTORY OEM SERVICE PROCEDURE
Problem Symptoms Table
POWER WINDOW CONTROL SYSTEM
| Symptom | Suspected Area | Refer To |
|---|---|---|
| Power window does not operate with power window regulator master switch | 1. ECU-B No. 2 fuse | - |
| 2. Power window master switch | Refer to Power Window Master Switch Power Source Circuit | |
| 3. Power window regulator motor | Refer to INSPECTION | |
| 4. Power window regulator master switch | Refer to INSPECTION | |
| Front passenger side power window does not operate with power window regulator switch | 1. Power window master switch | Refer to INSPECTION |
| 2. Power window regulator motor | Refer to INSPECTION - Step 1 | |
| 3. Power window regulator switch | Refer to INSPECTION | |
| Rear LH side power window does not operate with power window regulator switch | 1. Power window regulator switch | Refer to INSPECTION - Step 2 |
| 2. Power window regulator motor | Refer to INSPECTION - Step 4 | |
| 3. Power window regulator switch (rear LH side) | Refer to Rear Power Window Switch LH Circuit | |
| Rear RH side power window does not operate with power window regulator switch | 1. Power window regulator switch | Refer to INSPECTION - Step 1 |
| 2. Power window regulator motor | Refer to INSPECTION - Step 3 | |
| 3. Power window regulator switch (rear RH side) | Refer to Rear Power Window Switch RH Circuit | |
| AUTO UP/DOWN function does not operate (Only jam protection assistant) | 1. Diagnosis check | Refer to DIAGNOSIS SYSTEM |
| 2. Power window regulator motor reset | Refer to INITIALIZATION | |
| 3. Power window regulator master switch | Refer to INSPECTION | |
| 4. Wire harness | - | |
| Remote UP/DOWN function does not operate | 1. DATA LIST/ACTIVE TEST | Refer to DATA LIST / ACTIVE TEST |
| 2. Power window regulator master switch | Refer to INSPECTION | |
| 3. Wire harness | - | |
| Power window can be operated after engine switch is turned off even if operated conditions are not met | 1. Front door courtesy switch | Refer to INSPECTION - Step 1 |
| 2. Wire harness (LIN communication line) | - | |
| AUTO UP operation does not fully close power window (Jam protection function is activated) | 1. Power window regulator motor reset | Refer to INITIALIZATION |
| 2. Check & clean glass run | - | |
| 3. Power window regulator master switch | Refer to INSPECTION |
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.
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