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.
2010 Lexus RX 450h 3.5 BFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Chart
POWER WINDOW CONTROL SYSTEM
| DTC Code | Detection Item | Trouble Area | See |
|---|---|---|---|
| B2311 | Power Window Motor Malfunction | 1. Battery disconnected when power switch on (IG) 2. Power window regulator motor assembly (for driver side) 3. Power window regulator motor assembly (for front passenger side) 4. Power window regulator motor assembly (for rear LH side) 5. Power window regulator motor assembly (for rear RH side) 6. Incorrect installation of power window components 7. Overheated power window regulator motor assembly |
Refer to DTC B2311: Power Window Motor Malfunction |
| B2312 | Power Window Switch Malfunction | 1. Multiplex network master switch assembly 2. Power window regulator switch assembly (for front passenger side) 3. Power window regulator switch assembly (for rear LH side) 4. Power window regulator switch assembly (for rear RH side) 5. Power window regulator motor assembly (for driver side) 6. Power window regulator motor assembly (for front passenger side) 7. Power window regulator motor assembly (for rear LH side) 8. Power window regulator motor assembly (for rear RH side) 9. Wire harness or connector |
Refer to DTC B2312: Power Window Switch Malfunction |
| B2313 | Glass Position Initialization Incomplete | 1. Power window regulator motor assembly (for driver side) not initialized 2. Power window regulator motor assembly (for front passenger side) not initialized 3. Power window regulator motor assembly (for rear LH side) not initialized 4. Power window regulator motor assembly (for rear RH side) not initialized 5. Power window regulator motor assembly (for driver side) 6. Power window regulator motor assembly (for front passenger side) 7. Power window regulator motor assembly (for rear LH side) 8. Power window regulator motor assembly (for rear RH side) |
Refer to DTC B2313: Glass Position Initialization Incomplete |
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.
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