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Home / DTC / U0475 — Invalid Data Received From “Restraints System Sensor E”

U0475 — Invalid Data Received From “Restraints System Sensor E”

Detailed page for trouble code U0475.

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U0475

HYUNDAI U — Network/User

Invalid Data Received From “Restraints System Sensor E”

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

Causes

  • Faulty or intermittent CAN/LIN communication between modules (open/short/poor ground)
  • Damaged wiring or corroded/loose connector at Restraints System Sensor E or intermediate harness
  • Failed or internally defective Restraints System Sensor E (airbag module, seatbelt pretensioner sensor, or impact sensor)
  • Low or unstable battery voltage/power supply to restraint modules during communication
  • Missing or incorrect software/calibration or incompatible module replaced without programming
  • Water intrusion or physical damage to connector or sensor assembly

Symptoms

  • Airbag (SRS) warning lamp illuminated on instrument panel
  • DTC(s) related to restraints/airbag or communication stored in multiple modules
  • Some occupant restraint features (airbag deployment enable/seatbelt pretensioners) may be disabled
  • Intermittent or permanent fault messages, possibly only when vehicle is driven or when seats are moved
  • Other modules on same CAN bus may show communication errors or related codes

What to check

  • Read all stored DTCs and freeze frame data from SRS, BCM, and gateway modules using a capable scan tool
  • Inspect the Restraints System Sensor E connector(s) and wiring for corrosion, bent pins, chafing, or damage (check under seats, B‑pillar, floor harness)
  • Verify battery voltage and chassis/engine grounds; check for voltage drops on restraint module power feeds
  • Check for related U or B codes in other modules that indicate CAN bus issues
  • Wiggle test wiring and connectors while monitoring live data to reproduce the fault
  • Inspect for water ingress or signs of previous collision repair near restraint sensor locations

Signal parameters

  • Message type: CAN network message from Restraints System Sensor E (module-specific ID on Hyundai CAN bus)
  • Expected periodicity: message typically transmitted at a regular interval (e.g., 5–50 Hz depending on vehicle implementation)
  • Data length: commonly 8 bytes; contains status flags, sensor readings, and checksum/CRC or counter
  • Valid data ranges: status byte(s) should be within defined values (e.g., 0x00 = OK, 0x01..0x0F = fault codes); out‑of‑range or impossible values indicate invalid data
  • Bus voltage/levels: CAN_H and CAN_L differential signals should show ~2.5 V idle and proper recess/dominant transitions when active
  • Error frames/counters: elevated CAN error frames, CRC errors, or bus-off conditions indicate communication faults

Diagnostic algorithm

  1. Capture and record all current and pending DTCs (SRS, BCM, gateway) and note freeze frame/live data when the code set.
  2. Clear codes, attempt to reproduce. If the code returns, proceed with focused checks.
  3. Visually inspect the Restraints System Sensor E connector(s), pins and wiring. Repair any corrosion, bent pins or damaged insulation. Ensure connectors fully seat.
  4. Verify all power and ground circuits for the restraint modules (measure battery voltage at module connector and check ground resistance).
  5. Use a scan tool to monitor the specific CAN message from Restraints System Sensor E (if available) or monitor related live data frames for valid values and periodicity.
  6. Perform a wiggle/movement test on the harness and connector while watching live data or fault status to find intermittent wiring faults.
  7. Check CAN bus integrity: measure CAN_H/CAN_L with oscilloscope or CAN tester, look for proper differential waveform and absence of excessive noise/error frames. Verify bus termination resistances.
  8. If wiring and bus checks are good, attempt reprogramming or software update of the SRS/gateway modules per manufacturer guidance; ensure any replaced module is correctly coded.
  9. If fault persists and wiring/bus and programming verified, consider replacing Restraints System Sensor E (module swap with known-good unit where permitted) and retest.
  10. After repair, clear codes and verify no reoccurrence through road test and repeated module checks.

Likely causes

  • Connector under seat or in door pillar for Restraints System Sensor E is corroded, loose, or disconnected
  • Shorted or damaged CAN pair between sensor and main airbag/BCM/gateway
  • Failed restraint sensor module (internal fault)
  • Faulty module ground or supply causing data corruption
  • Recent service (module replacement, harness work) left connector unseated or caused wiring damage

Fault status

⚠️ Status
U0475 — Invalid Data Received From “Restraints System Sensor E”. Indicates corrupted, out‑of‑range, or missing CAN message from the specified restraint sensor module; possible communication, wiring, power, or module fault.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0100 U0121 U0140 U0401 U0415
371

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