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Home / DTC / U0224 — Lost Communication With “Door Window Motor C”

U0224 — Lost Communication With “Door Window Motor C”

Detailed page for trouble code U0224.

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Code

U0224

HYUNDAI U — Network/User

Lost Communication With “Door Window Motor C”

Brand: HYUNDAI
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty/failed door window motor with integrated controller
  • Open, short, or high-resistance wiring or connector between the motor and BCM/CAN bus
  • Corroded or loose connector pins at the door or BCM
  • Lost or weak power or ground to the window motor/module (blown fuse, poor ground)
  • CAN bus wiring short to battery/ground or open circuit
  • Poor termination or wrong CAN bus resistance (bad/missing terminator)

Symptoms

  • Affected door window (C) does not operate or operates intermittently
  • Window may not respond to switches or key fob commands for that door
  • Driver or passenger door master switch may fail to control that window
  • Multiple network-related DTCs or loss of other body functions may be present if CAN issue
  • No CAN messages from the motor shown on a capable scan tool or missing data for that device

What to check

  • Read all stored DTCs and freeze frame with a capable OEM-level scanner; record time and conditions
  • Check for additional U-codes (other modules lost communication) to identify broader CAN issues
  • Visually inspect door harness, check hinge/boot area for pinched or broken wires and connector corrosion
  • Check fuses and relays for the power circuits related to the window motor
  • With ignition ON, verify 12 V power and good ground at the motor connector (measure pin-to-ground and pin-to-battery)
  • Using a scan tool, attempt to request data from Door Window Motor C; note if module responds or times out

Signal parameters

  • Nominal CAN idle voltages ~CAN_H ≈ 2.5–3.5 V, CAN_L ≈ 2.5–1.5 V; differential voltage ~0 V idle, up to ~2 V dominant bits (varies by vehicle)
  • Expected resistance between CAN_H and CAN_L with network terminated ≈ 60 ohms (two 120 Ω terminators in parallel)
  • Battery voltage at motor connector: 11–14.5 V with ignition on
  • Ground continuity:
  • When commanded, motor power lines may show switched/pulsed voltage (PWM) — frequency varies by design; use manufacturer service data for exact values

Diagnostic algorithm

  1. Use an OEM-capable scan tool. Read and record all DTCs and live data. Confirm U0224 is current and check freeze frame data.
  2. Clear codes and attempt to operate the affected window while monitoring for immediate code return and live data for the motor/module.
  3. Inspect the door harness, especially through the door hinge boot, for damage, chafing, or corrosion. Repair any damaged wires (splice with solder or OEM repair method) and reseal connectors.
  4. Verify power and ground at the motor connector with ignition ON. If power or ground missing, trace back to fuse/relay and ground point. Repair as needed.
  5. Check CAN communication: measure CAN_H and CAN_L voltages at motor connector and at BCM. Compare to specification and to a known good node. Check termination resistance across CAN_H/L with ignition OFF.
  6. If CAN voltages/resistance are out of tolerance, isolate by disconnecting suspect modules (one at a time) while monitoring CAN to locate shorting module or wiring fault.
  7. If wiring and CAN bus are good but motor does not respond, bench-test or substitute a known-good motor/module (if available) to confirm internal motor controller failure.
  8. If motor replacement required, program/initialize the new unit per manufacturer procedure. After repairs, clear codes and verify operation and that U0224 does not return.
  9. If all wiring and motor check OK, suspect BCM or gateway module; perform module diagnostics, reflash software or replace module only after confirming network integrity and programming.
  10. Note: follow OEM safety procedures when accessing airbags, wiring in door jambs, and when performing module programming.

Likely causes

  • Corroded or loose door harness connector at hinge area (most common)
  • Broken wires in the door harness from repeated door opening/closing
  • Failed window motor internal controller
  • Blown fuse or poor ground at the door/window circuit
  • CAN bus short/open or missing termination resistor between CAN H and CAN L
  • Intermittent BCM or gateway module fault (less common)

Fault status

⚠️ Status
U0224 — Lost Communication With Door Window Motor C: No valid CAN messages received from window motor controller/module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

U0100 U0121 U0141 U0223 U0225
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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