U0524Invalid Data Received From Door Window Motor B
- Generic OBD-II code · Network
- How the car detects it
- U0524 means the master accepts frames from window motor B but not what they say. A common reason is a position value the controller cannot reconcile. Smart lift motors count Hall pulses between a learned lower and upper end, and Atmel's anti-pinch application note AVR480 describes acquiring such parameters during initialisation and spotting a defective Hall sensor from a run of apparent direction changes. After a battery disconnection, a motor replacement or a regulator that has slipped, the stored travel no longer matches reality, and many systems fall back to manual operation until the window has been re-initialised. No manufacturer publishes setting criteria for U0524 or the door assigned to B. U0223 covers a motor that has stopped answering.
- What you may notice
- One-touch operation lost on that window
- Window stops short of the top or reverses near the seal
- Likely causes
- LikelyEnd positions lost after battery disconnection, motor or regulator work
- PossibleHall sensor in motor B faulty, giving erratic position counts
- RareRegulator cable or glass clamp slipped, so travel no longer matches
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.