U0523Invalid Data Received From Door Window Motor A
- Generic OBD-II code · Network
- How the car detects it
- A door window motor in the J2012 sense is a lift motor with its own electronics that talks to the network, usually as a LIN slave of a door or body controller. Such a unit reports where the glass is, based on its Hall pulses, whether it stopped for an obstacle or a stall and whether its sensor or supply has failed, as NXP's MM908E624 reference design (AN3147) shows. U0523 is stored when these reports from motor A reach the master but cannot be used. No manufacturer documents the code or the door behind letter A. Typical consequences are a window that only moves while the switch is held, a missing express function or no automatic closing on locking. Lost communication with the same motor is U0222.
- What you may notice
- Window moves only while the switch is held
- Express up/down or comfort closing unavailable
- Window stops part way
- Likely causes
- PossibleElectronics or Hall sensor in window motor A faulty
- PossibleWindow position not learned after battery disconnection or repair
- RareDamaged LIN, supply or ground wire to the motor
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.