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Home / DTC / U0524 — Invalid Data Received From Door Window Motor B

U0524 — Invalid Data Received From Door Window Motor B

Detailed page for trouble code U0524.

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Code

U0524

Generic U — Network/User

Invalid Data Received From Door Window Motor B

Brand: Generic
Type: U — Network/User
Views: UK: 14 EN: 16 RU: 8
AI status
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ready
Completed 100%
Page language: EN

Causes

  • Damaged or corroded wiring/connectors between the door/window motor and the body module
  • Poor or intermittent ground or supply voltage to the door window motor or its control module
  • Failed door window motor or motor control assembly (internal electronics)
  • Faulty CAN bus transceiver, BCM (Body Control Module), or gateway
  • Water intrusion or physical damage in the door harness or motor connector
  • Software bug, incomplete module programming, or configuration mismatch

Symptoms

  • Affected window does not respond or moves intermittently
  • Erratic window movement (stops, reverses, or stalls)
  • One or more door/window-related warnings or indicator messages on dash
  • Stored U0524 DTC and possibly related network communication codes
  • Noise from door when attempting window operation or no noise at all

What to check

  • Read all stored DTCs and freeze frame data with a capable scan tool; record associated codes and occurrence count
  • Check for Technical Service Bulletins (TSBs) or software updates for door/window or BCM modules
  • Visually inspect door wiring and connectors for corrosion, chafing, or water entry (pay attention to rubber boots and harness grommets)
  • Verify battery voltage and key-on power rails; check relevant fuses and relays
  • Wiggle test wiring and connectors while observing live data/messages to try to reproduce the fault
  • Use a scope or multimeter to check CAN bus integrity (dominant/recessive levels) and message activity

Signal parameters

  • CAN message containing Door Window Motor B status: expected periodic message ID and interval (typically 10–100 ms depending on vehicle)
  • Message fields: window position, direction/status bits, fault flags, temperature/current telemetry, rolling counter or checksum
  • Typical logic levels: CAN_H ~ 2.5 V dominant/recessive swing around ~2.5 V; verify differential behavior with scope
  • Power supply to motor/control: nominal battery voltage (approx. 12 V) on supply pin when ignition/accessory on
  • Motor command inputs: PWM or H-bridge control signals (check frequency and duty cycle if accessible)
  • Ground continuity and low resistance to chassis ground (

Diagnostic algorithm

  1. Connect a scan tool and record U0524 and any related codes; clear codes and attempt to re-create the fault to confirm persistence.
  2. Inspect the door/window motor connector and wiring harness for corrosion, bent pins, broken wires, or water ingress; repair any visible damage.
  3. Verify power and ground at the door window motor connector with key ON while exercising the switch: check battery voltage on supply pin and a solid ground on ground pin.
  4. Monitor live data from the door window motor module (position, status bits, currents) while operating the switch. Look for invalid/out-of-range values or missing messages.
  5. Check CAN bus health: verify proper recessive/dominant voltages, message frequency, and presence of the door motor B message. Use a scope or a capable scan tool to view packet content if possible.
  6. Wiggle the harness, connectors, and door jamb while monitoring live data to find intermittent wiring faults.

Likely causes

  • Corroded/damaged connector or wiring at the door window motor (most common)
  • Open/poor ground or low battery/ignition supply to the door motor/module
  • Failed door window motor control board or motor electronics
  • Faulty CAN transceiver or BCM receiving module
  • Software/firmware mismatch or required module reprogramming

Fault status

⚠️ Status
Invalid/illegal data received from Door Window Motor B. The body control/gateway detected corrupted, out-of-range, or missing values in the module’s communication and stored U0524.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

U0523 U0525 U0100 U0121 U0401 U0073
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