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.
2004 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Power Window Control System - Diagnosis
- Precaution
- Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Customize Parameters
- Initialization
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- DTC Check/Clear
- Data List/Active Test
- Diagnostic Trouble Code Chart
- DTC B1221: Power Window Switch Circuit On Driver Door
- DTC B1223: Power Window Switch Circuit On Passenger Door
- DTC B1226: Power Window Switch Circuit On Rear Door LH
- DTC B1225: Power Window Switch Circuit On Rear Door RH
- DTC B1231, B1232: Jam Protection Limit Switch Circuit On Driver Side Door, Jam Protection Pulse Sensor Circuit On Driver Side Door
- DTC B1233, B1234: Jam Protection Limit Switch Circuit On Passenger Side Door, Jam Protection Pulse Sensor Circuit On Passenger Side Door
- DTC B1237, B1238: Jam Protection Limit Switch Circuit On Rear Door LH, Jam Protection Pulse Sensor Circuit On Rear Door LH
- DTC B1235, B1236: Jam Protection Limit Switch Circuit On Rear Door RH, Jam Protection Pulse Sensor Circuit On Rear Door RH
- Driver Door Ecu Power Source Circuit
- Passenger Door Ecu Power Source Circuit
- Rear Door LH Ecu Power Source Circuit
- Rear Door RH Ecu Power Source Circuit
- Power Window Master Switch Circuit
- Power Window Regulator Switch Circuit On Passenger Side
- Power Window Regulator Switch Circuit On Rear LH
- Power Window Regulator Switch Circuit On Rear RH
- Power Window Motor Circuit (Driver Side)
- Power Window Motor Circuit (Passenger Side)
- Power Window Motor Circuit (Rear LH)
- Power Window Motor Circuit (Rear RH)
- Window Lock Signal Circuit
- On-Vehicle Inspection
- Inspection
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.