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 SC 430FACTORY OEM SERVICE PROCEDURE
Problem Symptoms Table
PROBLEM SYMPTOMS
| Problem Symptom | Suspected Area |
|---|---|
| Power window operation is impossible by operation interlocked with key | 1. FRONT DOOR LOCK ASSEMBLY LH |
| 2. DRIVER DOOR ECU | |
| 3. PASSENGER DOOR ECU | |
| 4. Wire harness | |
| Operation is impossible after key-OFF | 1. FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY |
| 2. DRIVER DOOR ECU | |
| 3. PASSENGER DOOR ECU | |
| Window operation via regulator switch for each seat is impossible | 1. D FRONT DOOR 25 A FUSE |
| 2. P FRONT DOOR 25 A FUSE | |
| 3. POWER WINDOW REGULATOR SWITCH ASSEMBLY | |
| 4. POWER WINDOW REGULATOR MOTOR ASSEMBLY RH | |
| 5. POWER WINDOW REGULATOR MOTOR ASSEMBLY LH | |
| 6. Wire harness | |
| Remote operation of other seat via master switch is impossible | 1. POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY |
| 2. 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.