Code
U0552
Generic
U — Network/User
Invalid Data Received From Running Board Control Module B
Views:
UK: 18
EN: 20
RU: 15
AI status
Completed
Completed
100%
Causes
- Faulty Running Board Control Module B (hardware or firmware)
- Corroded or loose connector at the running board module
- Damaged wiring (open, short to ground/power, intermittent) between module and network
- CAN or local network bus fault (short, high resistance, failed termination)
- Low or unstable vehicle battery/charging system voltage during communication
- Software/calibration mismatch or incorrect module programming
Symptoms
- Running boards (side steps) fail to deploy or stow, operate intermittently or move erratically
- Instrument cluster warning message or service notification about running board or network communication
- Multiple network-related U-codes stored in vehicle control modules
- Related switches or remote functions for running boards unresponsive
- Occasional loss of other CAN module functions or sporadic electrical gremlins
What to check
- Read all stored and pending DTCs from all modules; note freeze frame and occurrence frequency
- Check battery voltage and charging system; ensure stable supply (12.0–14.5 V) during testing
- Inspect connectors and wiring at Running Board Control Module B for corrosion, water intrusion, bent pins, or damage
- Perform wiggle tests on harness while monitoring network traffic and symptom reproduction
- Scan the vehicle network for bus errors, message counts, and message CRC/checksum failures
- Measure CAN bus differential voltage with an oscilloscope (or multimeter) and check for proper termination (approx. 60 Ω between CAN H and CAN L)
Signal parameters
- CAN/LIN message containing running board status/position (manufacturer-specific message ID)
- Expected message frequency: typically 5–100 Hz depending on parameter (manufacturer dependent)
- Data length (DLC): often 6–8 bytes containing command, position, status flags, checksum/timestamp
- Valid value ranges: status flags should be consistent (e.g., deployed/stowed/transition), position within 0–100% or known encoder counts
- Signal integrity: clean CAN differential waveform, no dominant error frames, low bit errors or CRC failures
Diagnostic algorithm
- Read and record all U-codes and related codes from every module. Note whether U0552 is current or intermittent.
- Clear codes and attempt to reproduce the fault while observing module responses and network traffic with an OEM scan tool.
- Verify battery/charging voltage and ensure proper ground connections at chassis and module grounds.
- Visually inspect the running board module connector and harness for corrosion, water, or damage; repair any issues.
- Check power and ground pins at the module with reference to battery; verify correct voltages present with ignition ON.
- Monitor CAN (or LIN) bus with a scope or professional network tool while operating running board controls; look for missing, corrupted, or nonconforming messages.
- If wiring and bus appear good, attempt a module reset or reflash/update module software per manufacturer procedure; reconfigure if module was recently replaced.
- Substitute a known-good running board control module if available and re-test to determine if the module itself is faulty.
- After repairs, clear codes and road/test to confirm U0552 does not return and running board functions are restored.
- If fault persists, escalate to manufacturer technical support for network trace logs and service bulletins.
Likely causes
- Missing or corrupted CAN messages from Running Board Control Module B due to module hardware failure
- Damaged connector or pin causing intermittent data or wrong signal levels
- Network bus wiring shorted or high resistance causing garbled frames
- Module not configured or programmed correctly after replacement or software update
- Other module reporting bad data because it cannot properly address or parse messages from Running Board Control Module B
Fault status
Status
Invalid Data Received From Running Board Control Module B
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Repair manuals
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Code
U0552
HYUNDAI
U — Network/User
Invalid Data Received From Running Board Control Module “B”
Views:
UK: 18
EN: 17
RU: 19
AI status
Completed
Completed
100%
Causes
- Faulty Running Board Control Module B (hardware or firmware)
- Corroded or loose connector at the running board module
- Damaged wiring (open, short to ground/power, intermittent) between module and network
- CAN or local network bus fault (short, high resistance, failed termination)
- Low or unstable vehicle battery/charging system voltage during communication
- Software/calibration mismatch or incorrect module programming
Symptoms
- Running boards (side steps) fail to deploy or stow, operate intermittently or move erratically
- Instrument cluster warning message or service notification about running board or network communication
- Multiple network-related U-codes stored in vehicle control modules
- Related switches or remote functions for running boards unresponsive
- Occasional loss of other CAN module functions or sporadic electrical gremlins
What to check
- Read all stored and pending DTCs from all modules; note freeze frame and occurrence frequency
- Check battery voltage and charging system; ensure stable supply (12.0–14.5 V) during testing
- Inspect connectors and wiring at Running Board Control Module B for corrosion, water intrusion, bent pins, or damage
- Perform wiggle tests on harness while monitoring network traffic and symptom reproduction
- Scan the vehicle network for bus errors, message counts, and message CRC/checksum failures
- Measure CAN bus differential voltage with an oscilloscope (or multimeter) and check for proper termination (approx. 60 Ω between CAN H and CAN L)
Signal parameters
- CAN/LIN message containing running board status/position (manufacturer-specific message ID)
- Expected message frequency: typically 5–100 Hz depending on parameter (manufacturer dependent)
- Data length (DLC): often 6–8 bytes containing command, position, status flags, checksum/timestamp
- Valid value ranges: status flags should be consistent (e.g., deployed/stowed/transition), position within 0–100% or known encoder counts
- Signal integrity: clean CAN differential waveform, no dominant error frames, low bit errors or CRC failures
Diagnostic algorithm
- Read and record all U-codes and related codes from every module. Note whether U0552 is current or intermittent.
- Clear codes and attempt to reproduce the fault while observing module responses and network traffic with an OEM scan tool.
- Verify battery/charging voltage and ensure proper ground connections at chassis and module grounds.
- Visually inspect the running board module connector and harness for corrosion, water, or damage; repair any issues.
- Check power and ground pins at the module with reference to battery; verify correct voltages present with ignition ON.
- Monitor CAN (or LIN) bus with a scope or professional network tool while operating running board controls; look for missing, corrupted, or nonconforming messages.
- If wiring and bus appear good, attempt a module reset or reflash/update module software per manufacturer procedure; reconfigure if module was recently replaced.
- Substitute a known-good running board control module if available and re-test to determine if the module itself is faulty.
- After repairs, clear codes and road/test to confirm U0552 does not return and running board functions are restored.
- If fault persists, escalate to manufacturer technical support for network trace logs and service bulletins.
Likely causes
- Missing or corrupted CAN messages from Running Board Control Module B due to module hardware failure
- Damaged connector or pin causing intermittent data or wrong signal levels
- Network bus wiring shorted or high resistance causing garbled frames
- Module not configured or programmed correctly after replacement or software update
- Other module reporting bad data because it cannot properly address or parse messages from Running Board Control Module B
Fault status
Status
Invalid Data Received From Running Board Control Module B
Repair difficulty: Medium
Diagnostic time: 0.5 - 2.0 hours
Repair manuals
Manual library for HYUNDAI
84
Browse 84 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
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