U0454

Code

HYUNDAI U — Network/User

Invalid Data Received From Side Restraints Control Module Right

Brand: HYUNDAI

Type: U — Network/User

Views: UK: 15 EN: 18 RU: 14

AI status

Completed

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Completed 100%

Page language: EN

Causes

Open/short/corroded wiring or poor connector at Right Side Restraints Control Module (RSCM Right)
Loss of power or ground to the RSCM Right (fuse, splice, damaged lead)
Intermittent or permanent CAN/LIN bus fault (open, short to Vb/GND, missing termination)
Faulty RSCM Right (internal failure)
Mismatched or incomplete module programming or software (after replacement or update)
Interference or bus overload from other modules or aftermarket equipment

Symptoms

SRS / Airbag warning lamp illuminated or stored on
Right-side airbag or seatbelt pretensioner may be disabled (system flags)
Communication faults visible on scan tool (module not responding or sending invalid data)
Possible disablement of related safety features or instrument cluster warning messages
Event data or fault history entries for the side restraint circuit

What to check

Read all stored U- and B-/C- codes with OEM-capable scan tool; record freeze frame and status
Check for related communication codes (other U-codes) and SRS-specific codes in the right side module
Visually inspect wiring and connector at RSCM Right for corrosion, bent pins, water damage, chafing or recent body repairs
Verify battery voltage and ground integrity; check fuses and power feeds to the RSCM Right
Attempt to communicate with the RSCM Right using a scan tool; note whether module responds and whether data fields look valid
Check CAN bus health: measure CAN_H and CAN_L at the module and at a known good node; inspect termination resistance (~60 ohm across bus)

Signal parameters

Supply voltage to RSCM Right: nominal battery voltage (approx. 9–16 V) when key on/run
Ground: continuity to chassis ground; low resistance expected
CAN bus idle voltages: CAN_H and CAN_L near recessive common voltage (~2.5 V each); dominant state shows expected differential levels (CAN_H rises, CAN_L falls)
CAN differential voltage during traffic: pulses with expected frequency; absence or constant levels indicates bus fault
Expected periodic status messages from RSCM Right (module should transmit/receive regular packets — absence indicates communication loss)

Diagnostic algorithm

Safety first: Disable battery per manufacturer SRS safety procedure before unplugging SRS connectors or performing repairs. Follow all SRS warnings. Reconnect only when safe to test communications.
Scan and record: Use an OEM-capable scan tool to read U- and SRS codes, freeze data, and attempt to communicate with the RSCM Right. Note if the module is present and reporting.
Inspect harness/connectors: Visually and mechanically inspect the connector and harness at the RSCM Right for damage, corrosion, moisture, or pin issues. Repair or reseal as required.
Verify supply and grounds: With key on, measure module supply voltage and grounding continuity. Repair any fuse, power feed, or ground faults.
Check bus signals: Probe CAN_H and CAN_L at the module with a multimeter and ideally an oscilloscope. Confirm idle voltages and differential signalling; check termination resistance across the bus (~60 ohm).
Isolate faults: If bus voltages are abnormal at the module but normal elsewhere, suspect local wiring/connector. If abnormal across the bus, trace/repair bus short/open/termination issues. Disconnect suspect aftermarket devices.
Attempt communication after repairs: Clear codes, then attempt re-scan. If module still reports invalid data or does not respond, consider module replacement only after confirming wiring, power, grounds, and bus integrity.
Reprogram/initialize: If replacement module is installed, follow OEM programming, calibration, and initialization procedures. Verify no codes return and perform any required SRS system checks.
Final verification: Road test and re-scan to confirm fault does not return. Document all repairs and advise that airbag/SRS components must be handled by trained technicians.

Likely causes

Damaged connector pins or water intrusion at the right side restraints module harness
Blown fuse or poor battery connection feeding the RSCM Right
Broken CAN low/high wire in door sill or B-pillar (common flex area)
Module software/calibration mismatch after a service replacement
High-resistance ground at a common SRS ground point

Fault status

⚠️ Status

Invalid or corrupted data received from Right Side Restraints Control Module — communication/data integrity fault. SRS features for the right side may be impaired; inspect communication, power/ground, connectors, and module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0 - 3.0 hours

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U0454 — Invalid Data Received From Side Restraints Control Module Right