Code
B295000
HYUNDAI
B — Body
DMB Antenna Connection & Receive Quality
Views:
UK: 10
EN: 16
RU: 12
AI status
Completed
Completed
100%
Causes
- Damaged or broken DMB antenna or mast
- Loose, corroded or disconnected antenna/coax connector
- Short or open in coaxial cable or wiring harness
- Antenna amplifier (power/LNA) failure
- Blown fuse or loss of antenna power supply/ground
- Infotainment/module fault or software anomaly
Symptoms
- No DMB channels or very weak/ intermittent DMB reception
- Static, dropouts or poor audio/video on DMB stations
- DMB receiver error message or DTC present on scan tool
- Reception improves when touching or moving antenna area (indicates intermittent connection)
What to check
- Use a scan tool to read and record DTC(s) and freeze frame data; clear codes and attempt to reproduce
- Visually inspect antenna, mast, roof base and coax connector for damage, corrosion or water ingress
- Check antenna connector seating at roof and at the receiver/module
- Inspect coax routing for kinks, chafing, pinches or rodent damage
- Verify related fuses and power supply to antenna amplifier (if applicable)
- Perform a wiggle test on antenna connectors and harness while monitoring signal or DTC status
Signal parameters
- DMB signal strength (RSSI) — low or 0 indicates poor reception
- Signal-to-noise ratio (SNR) / carrier-to-noise — very low values indicate poor quality
- Bit error rate (BER) — elevated BER indicates reception problems
- Antenna power supply voltage (measure at antenna/amp; typically 5V or 12V — check vehicle spec)
- Antenna amplifier current draw (if measurable)
- Coaxial continuity and DC resistance between antenna center conductor and receiver ground (should not be shorted)
Diagnostic algorithm
- Retrieve DTC B295000 with an OEM-capable scan tool and note freeze frame/related codes
- Attempt to clear the code and check if it returns while reproducing the symptom
- Visually inspect the roof antenna, base, and connector for damage, corrosion or water entry; repair as needed
- Inspect coaxial cable routing and connector integrity from antenna to receiver; repair or replace damaged coax
- Measure antenna power supply at the receiver/antenna connector (use vehicle wiring diagram for pinout); confirm proper voltage and ground
- Check continuity of center conductor and shield of the coax (disconnect connectors before ohm checks) and verify no short to vehicle ground
- If antenna amplifier is present, verify fuse and supply relay; verify amplifier operation (voltage present and appropriate current draw)
- Perform a wiggle test while monitoring signal parameters or DTCs to find intermittent faults
- If wiring and antenna/amp check good, swap or test the infotainment receiver/module if available per workshop procedure or consult technical service information (TSB/software updates)
- After repairs, clear codes and road-test or reproduce reception conditions to confirm fault does not return
Likely causes
- Loose/corroded antenna connector at the roof or module
- Open or shorted coaxial cable between antenna and receiver
- Failed antenna amplifier (no power or internally defective)
- Damaged antenna element from impact or corrosion
- Infotainment receiver/module fault (less common)
Fault status
Status
DMB antenna connection or receive quality fault detected. Check antenna assembly, coaxial cable, amplifier power/ground and receiver connections.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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