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Home / DTC / U0501 — Invalid Data Received From Door Control Module B

U0501 — Invalid Data Received From Door Control Module B

Detailed page for trouble code U0501.

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U0501

Generic U — Network/User

Invalid Data Received From Door Control Module B

Brand: Generic
Type: U — Network/User
Views: UK: 17 EN: 28 RU: 25
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Door Control Module B (hardware or software)
  • Corroded, damaged or loose connector(s) to the door module
  • Open, shorted, or high-resistance wiring on the vehicle network (CAN/LIN) to the module
  • CAN/LIN bus termination missing or shorted
  • Intermittent battery/ignition power or poor ground to the module
  • Software mismatch or failed module reflash/programming

Symptoms

  • Malfunctioning door functions (locks, windows, mirror, courtesy lights)
  • Inoperative or intermittent door lock/unlock commands
  • Door open/closed indicators incorrect or flashing
  • Related warning/message on dash (e.g., service door module)
  • Additional network-related DTCs or module drop-outs
  • Possible battery drain or modules failing to enter sleep

What to check

  • Scan for current and pending U-/B-/C-codes and note freeze-frame/occurrence conditions
  • Verify battery voltage and charging system (stable >= 12.4 V with key off, ~13.5–14.8 V with engine running)
  • Visually inspect connectors and wiring to Door Control Module B for corrosion, water intrusion, damage or loose pins
  • Check for aftermarket devices tied into vehicle networks or door circuits and disconnect if present
  • Using a scan tool, verify Door Control Module B is present on the network and check live data values for plausibility
  • Measure CAN/LIN bus voltages and verify termination (approx. recessive ~2.5 V common-mode; dominant ~3.5 V/1.5 V differential on CAN)

Signal parameters

  • Door Control Module B CAN/LIN message presence and frequency (expected periodic messages when awake)
  • Door lock/unlock status bytes (lock state for each door)
  • Door ajar / open/closed sensor states
  • Window motor/position data and mirror control commands
  • Courtesy light / interior lamp control data
  • Module power supply pin voltage and ground integrity

Diagnostic algorithm

  1. Retrieve all network and module DTCs with a capable scan tool; record freeze-frame and occurrence data.
  2. Clear codes, reproduce the symptom by cycling ignition/locking/unlocking doors and re-scan to confirm recurrence.
  3. Confirm stable supply voltage and good ground(s) at Door Control Module B connector; repair any issues.
  4. Visually inspect and backprobe the module connector pins for corrosion, bent pins, or poor crimps; repair connector or harness as needed.
  5. With key on (engine off), use scan tool to check whether Door Control Module B is present and reporting expected live data; note any out-of-range values or missing signals.
  6. Check the vehicle network physically: measure CAN_H and CAN_L voltages at the module; look for proper recessive/dominant voltages and for excessive noise with an oscilloscope if available.
  7. Verify termination resistors (approx. 60 ohms between CAN_H and CAN_L) and isolate segments to determine if a single wiring short causes invalid messages.
  8. Disconnect suspected non-critical modules or aftermarket devices to see if network behavior changes; if removing a device clears the condition, focus repair on that device/harness.
  9. If wiring and power are good, consider reprogramming or updating Door Control Module B software per manufacturer procedure; use exact calibration and VIN-specific programming.
  10. If module still fails after proper power, wiring, and software steps, replace Door Control Module B and perform reprogram/calibration as required. Re-check network and clear codes.
  11. After repair, confirm normal operation over multiple ignition cycles and test all door-related functions to ensure the fault is resolved.

Likely causes

  • Wiring or connector problem between module and network
  • Door Control Module B hardware fault
  • Bus error (missing termination, short to battery/ground)
  • Software/configuration mismatch or corrupted module programming

Fault status

⚠️ Status
Invalid data received from Door Control Module B — network communication or module data error detected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0500 U0100 U0101 U0155 U0140 U0073
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Code

U0501

HYUNDAI U — Network/User

Invalid Data Received From “Door Control Module B”

Brand: HYUNDAI
Type: U — Network/User
Views: UK: 12 EN: 17 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Door Control Module B (hardware or software)
  • Corroded, damaged or loose connector(s) to the door module
  • Open, shorted, or high-resistance wiring on the vehicle network (CAN/LIN) to the module
  • CAN/LIN bus termination missing or shorted
  • Intermittent battery/ignition power or poor ground to the module
  • Software mismatch or failed module reflash/programming

Symptoms

  • Malfunctioning door functions (locks, windows, mirror, courtesy lights)
  • Inoperative or intermittent door lock/unlock commands
  • Door open/closed indicators incorrect or flashing
  • Related warning/message on dash (e.g., service door module)
  • Additional network-related DTCs or module drop-outs
  • Possible battery drain or modules failing to enter sleep

What to check

  • Scan for current and pending U-/B-/C-codes and note freeze-frame/occurrence conditions
  • Verify battery voltage and charging system (stable >= 12.4 V with key off, ~13.5–14.8 V with engine running)
  • Visually inspect connectors and wiring to Door Control Module B for corrosion, water intrusion, damage or loose pins
  • Check for aftermarket devices tied into vehicle networks or door circuits and disconnect if present
  • Using a scan tool, verify Door Control Module B is present on the network and check live data values for plausibility
  • Measure CAN/LIN bus voltages and verify termination (approx. recessive ~2.5 V common-mode; dominant ~3.5 V/1.5 V differential on CAN)

Signal parameters

  • Door Control Module B CAN/LIN message presence and frequency (expected periodic messages when awake)
  • Door lock/unlock status bytes (lock state for each door)
  • Door ajar / open/closed sensor states
  • Window motor/position data and mirror control commands
  • Courtesy light / interior lamp control data
  • Module power supply pin voltage and ground integrity

Diagnostic algorithm

  1. Retrieve all network and module DTCs with a capable scan tool; record freeze-frame and occurrence data.
  2. Clear codes, reproduce the symptom by cycling ignition/locking/unlocking doors and re-scan to confirm recurrence.
  3. Confirm stable supply voltage and good ground(s) at Door Control Module B connector; repair any issues.
  4. Visually inspect and backprobe the module connector pins for corrosion, bent pins, or poor crimps; repair connector or harness as needed.
  5. With key on (engine off), use scan tool to check whether Door Control Module B is present and reporting expected live data; note any out-of-range values or missing signals.
  6. Check the vehicle network physically: measure CAN_H and CAN_L voltages at the module; look for proper recessive/dominant voltages and for excessive noise with an oscilloscope if available.
  7. Verify termination resistors (approx. 60 ohms between CAN_H and CAN_L) and isolate segments to determine if a single wiring short causes invalid messages.
  8. Disconnect suspected non-critical modules or aftermarket devices to see if network behavior changes; if removing a device clears the condition, focus repair on that device/harness.
  9. If wiring and power are good, consider reprogramming or updating Door Control Module B software per manufacturer procedure; use exact calibration and VIN-specific programming.
  10. If module still fails after proper power, wiring, and software steps, replace Door Control Module B and perform reprogram/calibration as required. Re-check network and clear codes.
  11. After repair, confirm normal operation over multiple ignition cycles and test all door-related functions to ensure the fault is resolved.

Likely causes

  • Wiring or connector problem between module and network
  • Door Control Module B hardware fault
  • Bus error (missing termination, short to battery/ground)
  • Software/configuration mismatch or corrupted module programming

Fault status

⚠️ Status
Invalid data received from Door Control Module B — network communication or module data error detected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0500 U0100 U0101 U0155 U0140 U0073
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

U0501

LAND ROVER U — Network/User

data received from the passenger door module Invalid

Brand: LAND ROVER
Type: U — Network/User
Views: UK: 4 EN: 9 RU: 5
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Door Control Module B (hardware or software)
  • Corroded, damaged or loose connector(s) to the door module
  • Open, shorted, or high-resistance wiring on the vehicle network (CAN/LIN) to the module
  • CAN/LIN bus termination missing or shorted
  • Intermittent battery/ignition power or poor ground to the module
  • Software mismatch or failed module reflash/programming

Symptoms

  • Malfunctioning door functions (locks, windows, mirror, courtesy lights)
  • Inoperative or intermittent door lock/unlock commands
  • Door open/closed indicators incorrect or flashing
  • Related warning/message on dash (e.g., service door module)
  • Additional network-related DTCs or module drop-outs
  • Possible battery drain or modules failing to enter sleep

What to check

  • Scan for current and pending U-/B-/C-codes and note freeze-frame/occurrence conditions
  • Verify battery voltage and charging system (stable >= 12.4 V with key off, ~13.5–14.8 V with engine running)
  • Visually inspect connectors and wiring to Door Control Module B for corrosion, water intrusion, damage or loose pins
  • Check for aftermarket devices tied into vehicle networks or door circuits and disconnect if present
  • Using a scan tool, verify Door Control Module B is present on the network and check live data values for plausibility
  • Measure CAN/LIN bus voltages and verify termination (approx. recessive ~2.5 V common-mode; dominant ~3.5 V/1.5 V differential on CAN)

Signal parameters

  • Door Control Module B CAN/LIN message presence and frequency (expected periodic messages when awake)
  • Door lock/unlock status bytes (lock state for each door)
  • Door ajar / open/closed sensor states
  • Window motor/position data and mirror control commands
  • Courtesy light / interior lamp control data
  • Module power supply pin voltage and ground integrity

Diagnostic algorithm

  1. Retrieve all network and module DTCs with a capable scan tool; record freeze-frame and occurrence data.
  2. Clear codes, reproduce the symptom by cycling ignition/locking/unlocking doors and re-scan to confirm recurrence.
  3. Confirm stable supply voltage and good ground(s) at Door Control Module B connector; repair any issues.
  4. Visually inspect and backprobe the module connector pins for corrosion, bent pins, or poor crimps; repair connector or harness as needed.
  5. With key on (engine off), use scan tool to check whether Door Control Module B is present and reporting expected live data; note any out-of-range values or missing signals.
  6. Check the vehicle network physically: measure CAN_H and CAN_L voltages at the module; look for proper recessive/dominant voltages and for excessive noise with an oscilloscope if available.
  7. Verify termination resistors (approx. 60 ohms between CAN_H and CAN_L) and isolate segments to determine if a single wiring short causes invalid messages.
  8. Disconnect suspected non-critical modules or aftermarket devices to see if network behavior changes; if removing a device clears the condition, focus repair on that device/harness.
  9. If wiring and power are good, consider reprogramming or updating Door Control Module B software per manufacturer procedure; use exact calibration and VIN-specific programming.
  10. If module still fails after proper power, wiring, and software steps, replace Door Control Module B and perform reprogram/calibration as required. Re-check network and clear codes.
  11. After repair, confirm normal operation over multiple ignition cycles and test all door-related functions to ensure the fault is resolved.

Likely causes

  • Wiring or connector problem between module and network
  • Door Control Module B hardware fault
  • Bus error (missing termination, short to battery/ground)
  • Software/configuration mismatch or corrupted module programming

Fault status

⚠️ Status
Invalid data received from Door Control Module B — network communication or module data error detected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0500 U0100 U0101 U0155 U0140 U0073
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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

199,00 UAH
Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
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Workshop Manual
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Short description

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199,00 UAH
Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
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Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

199,00 UAH
Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
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