Code
B295100
HYUNDAI
B — Body
DAB Antenna Connection & Receive Quality
Views:
UK: 21
EN: 25
RU: 22
AI status
Completed
Completed
100%
Causes
- Damaged, corroded or loose antenna connector(s)
- Broken or shorted coaxial cable between antenna and tuner
- Failed/disabled antenna amplifier (active antenna)
- Open/shorted wiring or poor ground to antenna/tuner
- Faulty DAB tuner/head unit or internal tuner module
- Interference from nearby electronics or aftermarket devices
Symptoms
- No DAB stations found or only a few stations detected
- Intermittent DAB reception or frequent dropouts
- Audio break-up, artifacts or poor quality on DAB channels
- DAB-specific error/warning messages on infotainment screen
- FM/AM may still work while DAB is poor or absent
What to check
- Verify customer complaint and reproduce symptom (station scan, road test)
- Inspect antenna mast/base and cable for physical damage or corrosion
- Wiggle coax and connectors while monitoring reception for intermittent faults
- Check connector seating at head unit and antenna; look for moisture
- Use a diagnostic tool to read tuner status, signal strength and any related codes
- Measure antenna bias/power at the antenna connector with ignition and radio on
Signal parameters
- DAB frequency bands: Band III ~174–240 MHz (primary) and L‑band ~1452–1492 MHz (where used)
- Coaxial system impedance: 50 Ω typical
- Antenna bias/supply to active antennas typically in the range 5–12 V depending on vehicle (verify OEM spec)
- Typical useful signal levels: good reception often > -80 dBm; marginal -100 to -80 dBm; poor < -100 dBm (vehicle-dependent)
- DAB quality metrics: low BER/High MER preferred (MER > ~10–15 dB is commonly acceptable, but refer to OEM limits)
Diagnostic algorithm
- Confirm code and freeze-frame/conditions using diagnostic tool; check for related stored codes.
- Ask customer about conditions (locations, weather, aftermarket antennas/equipment) and attempt to reproduce.
- Visually inspect external antenna, mast, mounting and cable routing for damage, corrosion or water ingress.
- With ignition and radio on, measure for antenna bias/power at the antenna coax center conductor; compare to OEM spec/range.
- Check continuity and resistance of coax from head unit to antenna; look for short to shield or open circuit.
- Disconnect antenna at the head unit and inspect connector pins for corrosion or bent pins; reconnect securely.
- If fitted, verify antenna amplifier supply (fuse, wiring, ground) and confirm amplifier output where serviceable.
- Perform a scan for DAB stations and observe signal level/quality parameters from the diagnostic tool while manipulating connections to find intermittent faults.
- If wiring and antenna appear good, test with a known-good antenna or swap the head unit/tuner (or bench-test tuner) to isolate component failure.
- After repair or replacement, clear codes, perform a DAB scan and road test to confirm consistent reception and that code does not return.
Likely causes
- Corroded or loose antenna connector at the antenna base or head unit
- Damaged or pinched coaxial cable (open or short)
- Failed active antenna amplifier (no bias voltage or amplifier output)
- Poor ground or blown fuse/power supply to antenna amp
- Internal tuner fault in the head unit (less common)
Fault status
Status
DAB antenna connection or receive quality fault detected — poor or no digital radio reception; check antenna, cable, amplifier and tuner.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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