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 ES 300FACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| DTC (1) | Description | |||
|---|---|---|---|---|
| Body ECU | ||||
| B1221 | Driver's Door Power Window Active Test | |||
| B1223 | Passenger's Door Power Window Active Test | |||
| Driver's Door ECU (Power Window Regulator Master Switch) | ||||
| B1231 | Driver's Side Jam Protection Limit Switch Malfunctions | |||
| B1232 | Driver's Side Jam Protection Sensor Malfunctions | |||
| Passenger's Door ECU (Power Window Regulator Switch) | ||||
| B1233 | Passenger's Side Jam Protection Limit Switch Malfunctions | |||
| B1234 | Passenger's Side Jam Protection Sensor Malfunctions | |||
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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.