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Home / DTC / U0516 — Invalid Data Received From “Door Switch A”

U0516 — Invalid Data Received From “Door Switch A”

Detailed page for trouble code U0516.

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Code

U0516

HYUNDAI U — Network/User

Invalid Data Received From “Door Switch A”

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

Causes

  • Faulty or intermittent door switch (Door Switch A)
  • Damaged wiring or poor connector at the door switch or BCM
  • Corroded or loose ground or power connection
  • BCM or gateway module input failure or internal fault
  • CAN bus or LIN network errors (noise, short to battery/ground)
  • Software mismatch or need for module reprogramming

Symptoms

  • Door ajar indicator incorrect or not changing with door movement
  • Interior lights not operating properly with door open/close
  • Central locking or auto-lock/unlock may behave incorrectly
  • DTC U0516 stored in BCM or gateway module
  • Other related network or module communication errors may be present

What to check

  • Read DTC(s) and freeze frame data with a capable scan tool; note conditions when fault set
  • Inspect door switch, latch assembly, wiring harness and connectors for damage, corrosion, and proper seating
  • Verify battery voltage and ground integrity at BCM and door switch ground points
  • Use scan tool to monitor Door Switch A status and compare with physical door open/close
  • Perform wiggle test of wiring and connectors while monitoring signal for intermittent changes
  • Check CAN/LIN bus for bus-off, error frames or low/high voltage using oscilloscope or scan tool network data

Signal parameters

  • Logical states: expected change when door toggles (e.g., 0 = closed, 1 = open) — verify with scanner
  • Switch circuit voltage: typically near 0 V or battery voltage depending on design (measure with multimeter while actuating)
  • Switch continuity: near 0 ohms when closed if switch is mechanical ground-type
  • CAN/Network: BCM/gateway transmits door status message; message should update on state change and not contain invalid bit patterns
  • Update rate: door status is usually event-driven or updated periodically (verify frequency with scan tool or oscilloscope)

Diagnostic algorithm

  1. Retrieve freeze frame and full DTC list; note any related U-codes or module communication faults.
  2. Clear codes and attempt to reproduce. Observe whether U0516 returns and under what conditions.
  3. Visually inspect the door A switch, latch, harness, and connector for damage, contamination, or poor contacts; repair as needed.
  4. Backprobe the door switch connector with a multimeter while actuating the door to confirm proper voltage/continuity and correct logic changes.
  5. With scan tool, monitor Door Switch A data stream while operating the door; if values are erratic or absent, isolate wiring to BCM by continuity/resistance checks and wiggle tests.
  6. Check grounds and supply circuits for the switch and BCM; repair any high-resistance grounds or poor power feeds.
  7. Inspect CAN/LIN bus health: look for error counters, bus-off status, and inspect physical CAN wires for shorts/opens; use oscilloscope if available to verify signal integrity.
  8. If wiring and switch test good, test BCM input pin operation per factory procedure (bench test or swap with known-good module where applicable and allowed).
  9. If module replacement is required, ensure correct part number and perform required programming/initialization; clear codes and verify repair.
  10. After repairs, road test/operate doors to confirm stable data and no recurrence of U0516.

Likely causes

  • Open or shorted circuit in door switch harness
  • Intermittent connector contact (moisture/corrosion/damage)
  • Failed door latch/switch assembly
  • BCM input pin fault or internal module failure
  • Network communication errors (CAN line short, high resistance)

Fault status

⚠️ Status
Invalid data received from Door Switch A — the module detected door switch information that is missing, out-of-range, or corrupted on the network or at the input circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

U0100 U0121 U0140 U0155 U0415
371

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