Code
U0184
Generic
U — Network/User
Lost Communication With Radio
Views:
UK: 48
EN: 27
RU: 74
AI status
Completed
Completed
100%
Causes
- Blown radio fuse or no power/ground to the radio
- Faulty radio/head unit or internal module failure
- Open or short in the CAN/LIN/MOST/ethernet data bus used by the radio
- Poor connector pin contact, corrosion, water intrusion or damaged harness
- Missing or incorrect termination or bus wiring (open/short to supply)
- Software mismatch, module asleep/suspended, or module needing reflash
Symptoms
- No audio, radio display blank, or infotainment functions inoperative
- Other modules report radio unavailable or show related errors
- Loss of certain vehicle features tied to the radio (navigation, phone)
- Intermittent operation — radio works sometimes or after wiggling harness
- Possible malfunctions in steering wheel audio controls or Bluetooth
What to check
- Scan for stored U0184 and related U‑codes; capture freeze frame and note ignition status
- Verify radio receives battery and ignition/switched power and a good ground
- Inspect fuses and relay(s) for the radio/infotainment circuit
- Visually inspect connectors, pins and harness to the radio for damage or corrosion
- Check whether other modules can communicate on the same network (use scan tool)
- Use a network tool/scan tool to view message traffic on the bus while commanding functions
Signal parameters
- Presence of CAN/LIN/MOST/Ethernet messages for the radio module (message IDs, expected frequency)
- Bus voltage levels and dominant/recessive signal amplitude (CAN low/high differential)
- Bus termination resistance (typically ~60 ohms across CAN high/low)
- Power rail voltages to the radio (battery and switched 12V, accessory circuits)
- Ground continuity and resistance from radio chassis ground to vehicle ground
- Error counters: CRC errors, bit errors or timeout counts reported by diagnostic tool
Diagnostic algorithm
- Confirm code and conditions: Clear codes and attempt to reproduce. Note whether code returns immediately or intermittently.
- Verify power/ground: With key on, measure battery and accessory power at the radio connector and check ground continuity.
- Inspect fuses/relays: Replace any blown fuses and test relay function if fitted.
- Check connectors/harness: Disconnect the radio and inspect pins for corrosion, damage, or bent pins. Repair as needed.
- Check network traffic: Use a scan tool or bus analyzer to monitor the data bus while commanding the radio. Confirm whether the radio transmits or receives expected messages.
- Verify bus integrity: Measure termination resistance and look for short-to-power or short-to-ground wiring faults. Wiggle test harness while monitoring bus to find intermittent faults.
- Isolate module: If possible, swap with a known-good radio or use a bench simulator to confirm whether the radio responds when properly powered and connected to a working bus.
- Check gateway/modules: Verify gateway and related modules are operational and routing messages. Scan for other U‑codes indicating upstream communication issues.
- Software/firmware: Check for available software updates or required reprogramming. Reflash only according to manufacturer procedures.
- Replace radio: If all vehicle wiring, power, and network are confirmed good and the radio does not respond, consider replacing the radio module and recheck communications.
Likely causes
- Blown fuse or missing power/ground to the radio
- Intermittent or open data bus connection (CAN/LIN/MOST) to the radio
- Radio/head unit failure (no UART/CAN response)
- Corroded/loose connector at radio or gateway module
Fault status
Status
Lost Communication With Radio — module not responding on vehicle data network (timeout/no message).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
U0184
HYUNDAI
U — Network/User
Lost Communication With Radio
Views:
UK: 31
EN: 17
RU: 64
AI status
Completed
Completed
100%
Causes
- Blown radio fuse or no power/ground to the radio
- Faulty radio/head unit or internal module failure
- Open or short in the CAN/LIN/MOST/ethernet data bus used by the radio
- Poor connector pin contact, corrosion, water intrusion or damaged harness
- Missing or incorrect termination or bus wiring (open/short to supply)
- Software mismatch, module asleep/suspended, or module needing reflash
Symptoms
- No audio, radio display blank, or infotainment functions inoperative
- Other modules report radio unavailable or show related errors
- Loss of certain vehicle features tied to the radio (navigation, phone)
- Intermittent operation — radio works sometimes or after wiggling harness
- Possible malfunctions in steering wheel audio controls or Bluetooth
What to check
- Scan for stored U0184 and related U‑codes; capture freeze frame and note ignition status
- Verify radio receives battery and ignition/switched power and a good ground
- Inspect fuses and relay(s) for the radio/infotainment circuit
- Visually inspect connectors, pins and harness to the radio for damage or corrosion
- Check whether other modules can communicate on the same network (use scan tool)
- Use a network tool/scan tool to view message traffic on the bus while commanding functions
Signal parameters
- Presence of CAN/LIN/MOST/Ethernet messages for the radio module (message IDs, expected frequency)
- Bus voltage levels and dominant/recessive signal amplitude (CAN low/high differential)
- Bus termination resistance (typically ~60 ohms across CAN high/low)
- Power rail voltages to the radio (battery and switched 12V, accessory circuits)
- Ground continuity and resistance from radio chassis ground to vehicle ground
- Error counters: CRC errors, bit errors or timeout counts reported by diagnostic tool
Diagnostic algorithm
- Confirm code and conditions: Clear codes and attempt to reproduce. Note whether code returns immediately or intermittently.
- Verify power/ground: With key on, measure battery and accessory power at the radio connector and check ground continuity.
- Inspect fuses/relays: Replace any blown fuses and test relay function if fitted.
- Check connectors/harness: Disconnect the radio and inspect pins for corrosion, damage, or bent pins. Repair as needed.
- Check network traffic: Use a scan tool or bus analyzer to monitor the data bus while commanding the radio. Confirm whether the radio transmits or receives expected messages.
- Verify bus integrity: Measure termination resistance and look for short-to-power or short-to-ground wiring faults. Wiggle test harness while monitoring bus to find intermittent faults.
- Isolate module: If possible, swap with a known-good radio or use a bench simulator to confirm whether the radio responds when properly powered and connected to a working bus.
- Check gateway/modules: Verify gateway and related modules are operational and routing messages. Scan for other U‑codes indicating upstream communication issues.
- Software/firmware: Check for available software updates or required reprogramming. Reflash only according to manufacturer procedures.
- Replace radio: If all vehicle wiring, power, and network are confirmed good and the radio does not respond, consider replacing the radio module and recheck communications.
Likely causes
- Blown fuse or missing power/ground to the radio
- Intermittent or open data bus connection (CAN/LIN/MOST) to the radio
- Radio/head unit failure (no UART/CAN response)
- Corroded/loose connector at radio or gateway module
Fault status
Status
Lost Communication With Radio — module not responding on vehicle data network (timeout/no message).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
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Code
U0184
LAND ROVER
U — Network/User
Lost communication with the audio unit
Views:
UK: 16
EN: 8
RU: 32
AI status
Completed
Completed
100%
Causes
- Blown radio fuse or no power/ground to the radio
- Faulty radio/head unit or internal module failure
- Open or short in the CAN/LIN/MOST/ethernet data bus used by the radio
- Poor connector pin contact, corrosion, water intrusion or damaged harness
- Missing or incorrect termination or bus wiring (open/short to supply)
- Software mismatch, module asleep/suspended, or module needing reflash
Symptoms
- No audio, radio display blank, or infotainment functions inoperative
- Other modules report radio unavailable or show related errors
- Loss of certain vehicle features tied to the radio (navigation, phone)
- Intermittent operation — radio works sometimes or after wiggling harness
- Possible malfunctions in steering wheel audio controls or Bluetooth
What to check
- Scan for stored U0184 and related U‑codes; capture freeze frame and note ignition status
- Verify radio receives battery and ignition/switched power and a good ground
- Inspect fuses and relay(s) for the radio/infotainment circuit
- Visually inspect connectors, pins and harness to the radio for damage or corrosion
- Check whether other modules can communicate on the same network (use scan tool)
- Use a network tool/scan tool to view message traffic on the bus while commanding functions
Signal parameters
- Presence of CAN/LIN/MOST/Ethernet messages for the radio module (message IDs, expected frequency)
- Bus voltage levels and dominant/recessive signal amplitude (CAN low/high differential)
- Bus termination resistance (typically ~60 ohms across CAN high/low)
- Power rail voltages to the radio (battery and switched 12V, accessory circuits)
- Ground continuity and resistance from radio chassis ground to vehicle ground
- Error counters: CRC errors, bit errors or timeout counts reported by diagnostic tool
Diagnostic algorithm
- Confirm code and conditions: Clear codes and attempt to reproduce. Note whether code returns immediately or intermittently.
- Verify power/ground: With key on, measure battery and accessory power at the radio connector and check ground continuity.
- Inspect fuses/relays: Replace any blown fuses and test relay function if fitted.
- Check connectors/harness: Disconnect the radio and inspect pins for corrosion, damage, or bent pins. Repair as needed.
- Check network traffic: Use a scan tool or bus analyzer to monitor the data bus while commanding the radio. Confirm whether the radio transmits or receives expected messages.
- Verify bus integrity: Measure termination resistance and look for short-to-power or short-to-ground wiring faults. Wiggle test harness while monitoring bus to find intermittent faults.
- Isolate module: If possible, swap with a known-good radio or use a bench simulator to confirm whether the radio responds when properly powered and connected to a working bus.
- Check gateway/modules: Verify gateway and related modules are operational and routing messages. Scan for other U‑codes indicating upstream communication issues.
- Software/firmware: Check for available software updates or required reprogramming. Reflash only according to manufacturer procedures.
- Replace radio: If all vehicle wiring, power, and network are confirmed good and the radio does not respond, consider replacing the radio module and recheck communications.
Likely causes
- Blown fuse or missing power/ground to the radio
- Intermittent or open data bus connection (CAN/LIN/MOST) to the radio
- Radio/head unit failure (no UART/CAN response)
- Corroded/loose connector at radio or gateway module
Fault status
Status
Lost Communication With Radio — module not responding on vehicle data network (timeout/no message).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email