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
Power Window Control System - Diagnosis
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Pre-Check
- Diagnostic Trouble Code Chart
- Location
- Terminals Of Ecu
- Problem Symptoms Table
- DTC B1231/31 Jam Protection Limit Switch Circuit On Driver Door & DTC B1232/32 Jam Protection Pulse Switch Circuit On Driver Door
- DTC B1233/33 Passengers Side Jam Protection Sensor Malfunctions & DTC B1234/34 Passengers Side Jam Protection Sensor Malfunctions
- Remote Operation Via Master Switch Is Impossible In The Other Seat(Operation Via Each Door Switch Is Possible)
- Window Cannot Be Operated After Key-Off
- Window Cannot Be Operated Via Regulator Switch On Passengers Side (Regulator Switch Circuit)
- Power Window Cannot Be Operated By Operation Interlocked With Key (Only Driver's Window)
- Windows Cannot Be Operated Via Regulator Switch In Each Seat
- Window Cannot Be Operated Via Regulator Switch In Driver's Side (Power Window Master Switch Circuit)
- Window Cannot Be Operated Via Regulator Switch In Driver's Side (Power Window Motor Circuit)
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.