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.

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HOMESERVICE MANUALSLEXUS2004GX 470REPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXPOWER WINDOW CONTROL SYSTEM DTCS

2004 Lexus GX 470

Power Window Control System DTCS

2004 Lexus GX 470SECTION Power Window Control System DTCS

POWER WINDOW CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC	Description
B1221	Power Window Switch Circuit on Driver Door
B1231	Jam Protection Limit Switch Circuit on Driver Door
B1232	Jam Protection Pulse Switch Circuit on Driver Door

RENDER: 1.0x

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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.