Code
B2821
HYUNDAI
B — Body
Voice Recognition DB File Error
Views:
UK: 12
EN: 20
RU: 17
AI status
Completed
Completed
100%
Causes
- Corrupted or missing voice recognition DB file
- Interrupted or failed software/DB update
- Damaged or failing storage media (SD card, HDD, eMMC, USB)
- Incompatible or incorrect DB/firmware version
- File system errors on AVN storage
- Communication fault between AVN and control modules during update
Symptoms
- Voice recognition does not respond or returns errors
- Display message indicating Voice Recognition DB File Error
- Limited or no voice-command functionality
- AVN unit may repeatedly prompt for DB update or reboot
- Possible loss of other infotainment features if storage fault is widespread
What to check
- Retrieve active and historic DTCs from AVN/head unit with capable scan tool
- Note exact error message and when it occurs (startup, after update, during command)
- Check AVN firmware and DB version in system settings
- Inspect removable media (SD/USB) for presence of update/DB files and physical damage
- Verify available storage space on AVN (if accessible)
- Check battery voltage and recent battery disconnects or jumps that could have occurred during an update
Signal parameters
- AVN firmware/software version
- Voice DB file name, size, and checksum (if available)
- File system status (read/write errors, free space)
- Storage device health indicators (SMART for HDD if supported, SD card readability)
- Last update timestamp for voice DB/firmware
- CAN/CAN-FD or LIN communication status between AVN and gateway/module
Diagnostic algorithm
- Confirm the reported condition and collect vehicle info (AVN part number, software version, DB version, exact error message).
- Scan AVN/head unit for stored DTCs and related P/U/B codes; record freeze frame or event data if available.
- Reproduce: power cycle the AVN and attempt a voice command to observe behavior and any messages.
- Inspect removable media (SD/USB): remove, check for physical damage, test reading on a PC. If DB files are present, verify file integrity (size/checksum) against OEM release notes.
- If removable media was used for previous updates, try using a known-good OEM update media or re-download the official voice DB package and install per service bulletin instructions.
- If the AVN supports a factory reset, back up user data and perform the reset to clear possible file system issues; then recheck voice DB status.
- If internal storage is suspected (no removable media or DB still missing/corrupt), request/perform AVN firmware reflash using OEM diagnostic software. Ensure stable battery voltage during reflashing.
- If reflashing fails or storage hardware shows errors, run module-level diagnostics for eMMC/HDD or consider replacing the storage/AVN unit per manufacturer guidance.
- After restoration, confirm voice recognition operation and clear relevant DTCs; road-test to ensure no recurrence.
- If issue persists after software reflash and storage replacement, escalate to manufacturer technical support and consider AVN assembly replacement.
Likely causes
- Corrupted DB file after interrupted update
- Failed or damaged SD/USB storage used for DB
- AVN firmware/software incompatible with installed DB
- Internal storage (eMMC/HDD) hardware failure
Fault status
Status
Voice recognition database file error — voice commands may be disabled. DB missing or corrupt; service required.
Repair difficulty: Medium
Diagnostic time: 0.5-3.0 hours
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