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Home / DTC / U0526 — Invalid Data Received From Door Window Motor D

U0526 — Invalid Data Received From Door Window Motor D

Detailed page for trouble code U0526.

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Code

U0526

Generic U — Network/User

Invalid Data Received From Door Window Motor D

Brand: Generic
Type: U — Network/User
Views: UK: 13 EN: 22 RU: 19
AI status
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Page language: EN

Causes

  • Corroded, loose, damaged or disconnected connector at the door/window motor module
  • Broken, shorted or high-resistance wiring (power, ground or signal) to the door/window motor
  • Faulty door window motor control module (internal electronics or firmware)
  • Vehicle network (CAN or LIN) communication fault or bus contention
  • Intermittent power supply or poor ground at the module (low voltage)
  • Water intrusion or mechanical damage to the motor or module

Symptoms

  • Affected door window does not respond to switches
  • Window operates intermittently or moves erratically
  • One or more related comfort/door functions may report faults
  • DTC U0526 stored in memory and may reappear after clearing
  • Possible blown fuse or increased battery current draw in worst cases

What to check

  • Read and record all stored codes from all modules with a scan tool; note freeze frame and occurrence counts
  • Verify operation of other networked modules to determine if the bus is healthy
  • Visually inspect the door/window motor connector and wiring for corrosion, pin damage, chafe or water intrusion
  • Check fuses and relays related to door/window circuits
  • Measure module supply voltage with ignition on and key off (expected nominal battery voltage when on)
  • Check ground integrity at the module (low resistance to vehicle chassis)

Signal parameters

  • Module present on network: module should respond to diagnostic queries (module ID visible on scan tool)
  • CAN/LIN message presence: expected periodic messages from door window module when awake
  • Supply voltage at module: nominal battery voltage (~12 V) with ignition/accessory on
  • Ground resistance: low (
  • Motor current draw: nominal 0 A at rest, increased (amps) during window operation (compare to spec)
  • Switch/input status and position feedback values reported by the module

Diagnostic algorithm

  1. Use a scan tool to confirm U0526, record related codes, and view live data for the door/window module and bus status.
  2. Clear codes, attempt window operation while watching for immediate reappearance; note conditions and frequency.
  3. Inspect connector and wiring at the door/window motor module for corrosion, bent pins, water, physical damage and secure fit.
  4. With ignition on, measure supply voltage at the module power pin(s) and measure ground continuity to chassis. Repair any low voltage or poor ground.
  5. Verify the module is present on the vehicle network (scan tool module list). If module absent, check bus wiring, terminations and related power/ignition feeds.
  6. Check motor current draw during operation (use a clamp meter). Excessive current suggests mechanical bind or motor fault; no current suggests open circuit or module not driving motor.
  7. Perform a wiggle test on harnesses while monitoring live data and DTCs to find intermittent faults.
  8. If wiring, power and ground are good and network communications are stable, consider reflashing module software if available, then retest.
  9. If fault persists and diagnostics point to the module, replace the door window motor control module or the motor assembly per manufacturer procedure.
  10. After repair, clear codes and verify full system operation and that U0526 does not return.

Likely causes

  • Loose/corroded connector or damaged wiring to the door/window motor module
  • Low supply voltage or poor ground at the motor/module
  • Faulty door window motor control module
  • CAN/LIN bus communication error or module not present on network
  • Water damage or mechanical obstruction causing abnormal data or current draw

Fault status

⚠️ Status
Invalid/corrupted data received from Door Window Motor D — possible communication, power/ground, wiring or module fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0200 U0100 U0140 U0155 U0121
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