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U0526 Invalid Data Received From Door Window Motor D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Not every lift motor carries Hall sensors. Patent US11611297 describes a cheaper approach in which the controller derives speed, current and how quickly current changes from the ripple that commutation leaves in the motor current, and recognises a pinch from those values. Positions obtained this way are sensitive to supply noise and brush wear, so the data reported by window motor D may drift out of the plausible range and lead to U0526. No manufacturer publishes this code or says which door uses letter D. Practical effects resemble the sister codes: express and comfort closing disabled, a lost end position, sometimes a window that halts part way. U0225 is stored instead when motor D does not answer at all.

Likely causes

Position counting from current ripple disturbed (brush wear, supply noise)
Window motor D or its electronics faulty
Poor ground or connector at the door

Symptoms

  • Window halts part way or misjudges its end position
  • Express and comfort closing unavailable

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–450
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

door window motor d

Related codes

U0225U0525U0527

References: patents.google.com, ww1.microchip.com.