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.
2021 Lexus LX 570FACTORY OEM SERVICE PROCEDURE
Sliding Roof System
SLIDING ROOF SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Detection Item | Trouble Area | See information |
|---|---|---|---|
| B2341 | Sensor (Motor) Failure | - Sliding roof drive gear sub-assembly (Sliding roof ECU) | Refer to DTC B2341: Sensor (Motor) Failure; DTC B2344: Position Failure [09/2015 - ] |
| B2342 | Switch Failure | - Sliding roof drive gear sub-assembly (Sliding roof ECU) - Map light assembly (Sliding roof switch) - Harness or connector |
Refer to DTC B2342: Switch Failure [09/2015 - ] |
| B2343 | Position Initialization Incomplete | - Sliding roof drive gear sub-assembly (Sliding roof ECU) - Map light assembly (Sliding roof switch) - Harness or connector |
Refer to DTC B2343: Position Initialization Incomplete [09/2015 - ] |
| B2344 | Position Failure | - Sliding roof drive gear sub-assembly (Sliding roof ECU) | Refer to DTC B2341: Sensor (Motor) Failure; DTC B2344: Position Failure [09/2015 - ] |
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.