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Home / DTC / U0245 — Lost Communication With Entertainment Control Module - Front

U0245 — Lost Communication With Entertainment Control Module - Front

Detailed page for trouble code U0245.

34,405codes
59brands
11,914generic
22,491specific
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Code

U0245

Generic U — Network/User

Lost Communication With Entertainment Control Module - Front

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

Causes

  • Blown fuse or relay powering the entertainment module
  • Poor or missing ground at the module
  • Damaged, corroded, or disconnected connector at the module
  • Open, shorted or high-resistance CAN/LIN wiring between the module and network
  • Module is powered but firmware/software fault or module internal failure
  • Network bus error from another module (bus-off) preventing communications

Symptoms

  • No audio, display, or touchscreen response from front entertainment unit
  • Steering wheel audio controls or microphone for hands-free not working
  • Unable to communicate with the front entertainment module using a scan tool
  • Other modules that rely on messages from the entertainment unit may show related faults or limited functionality
  • Intermittent operation or unit resets on vehicle start

What to check

  • Connect diagnostic scan tool; attempt to communicate with the front entertainment module and read freeze frame/live data
  • Check for other U-codes on the vehicle network (bus-off, other lost-communication codes)
  • Verify related vehicle fuses and relays for the entertainment module
  • Visually inspect the entertainment module connector for corrosion, bent pins, or water intrusion
  • Check battery voltage at the module power pin with ignition on/retain power state as required
  • Check ground(s) at module connector for good contact and low resistance to chassis

Signal parameters

  • CAN bus idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (difference ≈ 0 V)
  • CAN bus dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (difference ≈ 2.0 V)
  • Termination resistance between CAN_H and CAN_L with system powered (two 120 Ω terminators): ≈ 60 Ω (±5 Ω)
  • Open-circuit on CAN pair: infinite/very high resistance; short-to-ground or short-to-battery will show near 0 V or battery voltage on one line
  • Common baud rates: 500 kbps or 250 kbps (vehicle dependent)

Diagnostic algorithm

  1. Use a scan tool to confirm U0245 and record any additional network codes and freeze frame data. Attempt to communicate with the front entertainment control module.
  2. Verify vehicle ignition/wake state required for the front entertainment module. Some units are asleep until a wake message or ignition condition is present; wake network and retry communications.
  3. Check fuses and relays that supply the front entertainment module for proper continuity and voltage. Replace any blown fuses and re-test.
  4. Inspect the module connector for damage, corrosion, bent pins, loose terminals or water intrusion. Secure or repair connector as needed.
  5. Backprobe the module power and ground pins; verify battery voltage (or specified supply) and a good ground reference with key on and with module awake.
  6. Measure CAN_H and CAN_L voltages at the module connector with a multimeter. Compare to expected idle/dominant levels (see signal_params).
  7. If voltages are abnormal or no activity, use an oscilloscope or a CAN bus analyzer at the module and at a known-good node to compare waveforms and verify traffic presence. Look for stuck dominant/recessive, reflections, or noise.
  8. Check resistance between CAN_H and CAN_L at module connector to verify correct termination (~60 Ω). Also check continuity of each wire back to a nearby node or ECU to locate open or short.
  9. Inspect harness along routing (dash, door sills, firewall) for physical damage; repair wiring as needed. Wiggle harness and connectors while monitoring to reproduce intermittent faults.
  10. If wiring and power/ground are confirmed good, consider reprogramming or updating the entertainment module software per factory procedure. Verify correct part number and configuration if unit was recently replaced.
  11. If module still does not communicate and all network/wiring checks are good, bench-test or replace the entertainment control module. After repair or replacement, clear codes and perform full re-test of system and dependent functions.

Likely causes

  • Blown fuse or lost battery feed to front entertainment module
  • Bad ground or poor connector pins at module harness
  • Broken or shorted CAN High/CAN Low pair or damaged wiring in dash or harness paths
  • Entertainment module internal failure or corrupted firmware
  • A different node on the same network is holding the bus in an error state (bus-off)

Fault status

⚠️ Status
Lost Communication With Entertainment Control Module - Front: module not responding or not present on vehicle network; no valid messages received from front entertainment unit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

U0245

HYUNDAI U — Network/User

Lost Communication With Entertainment Control Module Front

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

Causes

  • Blown fuse or relay powering the entertainment module
  • Poor or missing ground at the module
  • Damaged, corroded, or disconnected connector at the module
  • Open, shorted or high-resistance CAN/LIN wiring between the module and network
  • Module is powered but firmware/software fault or module internal failure
  • Network bus error from another module (bus-off) preventing communications

Symptoms

  • No audio, display, or touchscreen response from front entertainment unit
  • Steering wheel audio controls or microphone for hands-free not working
  • Unable to communicate with the front entertainment module using a scan tool
  • Other modules that rely on messages from the entertainment unit may show related faults or limited functionality
  • Intermittent operation or unit resets on vehicle start

What to check

  • Connect diagnostic scan tool; attempt to communicate with the front entertainment module and read freeze frame/live data
  • Check for other U-codes on the vehicle network (bus-off, other lost-communication codes)
  • Verify related vehicle fuses and relays for the entertainment module
  • Visually inspect the entertainment module connector for corrosion, bent pins, or water intrusion
  • Check battery voltage at the module power pin with ignition on/retain power state as required
  • Check ground(s) at module connector for good contact and low resistance to chassis

Signal parameters

  • CAN bus idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (difference ≈ 0 V)
  • CAN bus dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (difference ≈ 2.0 V)
  • Termination resistance between CAN_H and CAN_L with system powered (two 120 Ω terminators): ≈ 60 Ω (±5 Ω)
  • Open-circuit on CAN pair: infinite/very high resistance; short-to-ground or short-to-battery will show near 0 V or battery voltage on one line
  • Common baud rates: 500 kbps or 250 kbps (vehicle dependent)

Diagnostic algorithm

  1. Use a scan tool to confirm U0245 and record any additional network codes and freeze frame data. Attempt to communicate with the front entertainment control module.
  2. Verify vehicle ignition/wake state required for the front entertainment module. Some units are asleep until a wake message or ignition condition is present; wake network and retry communications.
  3. Check fuses and relays that supply the front entertainment module for proper continuity and voltage. Replace any blown fuses and re-test.
  4. Inspect the module connector for damage, corrosion, bent pins, loose terminals or water intrusion. Secure or repair connector as needed.
  5. Backprobe the module power and ground pins; verify battery voltage (or specified supply) and a good ground reference with key on and with module awake.
  6. Measure CAN_H and CAN_L voltages at the module connector with a multimeter. Compare to expected idle/dominant levels (see signal_params).
  7. If voltages are abnormal or no activity, use an oscilloscope or a CAN bus analyzer at the module and at a known-good node to compare waveforms and verify traffic presence. Look for stuck dominant/recessive, reflections, or noise.
  8. Check resistance between CAN_H and CAN_L at module connector to verify correct termination (~60 Ω). Also check continuity of each wire back to a nearby node or ECU to locate open or short.
  9. Inspect harness along routing (dash, door sills, firewall) for physical damage; repair wiring as needed. Wiggle harness and connectors while monitoring to reproduce intermittent faults.
  10. If wiring and power/ground are confirmed good, consider reprogramming or updating the entertainment module software per factory procedure. Verify correct part number and configuration if unit was recently replaced.
  11. If module still does not communicate and all network/wiring checks are good, bench-test or replace the entertainment control module. After repair or replacement, clear codes and perform full re-test of system and dependent functions.

Likely causes

  • Blown fuse or lost battery feed to front entertainment module
  • Bad ground or poor connector pins at module harness
  • Broken or shorted CAN High/CAN Low pair or damaged wiring in dash or harness paths
  • Entertainment module internal failure or corrupted firmware
  • A different node on the same network is holding the bus in an error state (bus-off)

Fault status

⚠️ Status
Lost Communication With Entertainment Control Module - Front: module not responding or not present on vehicle network; no valid messages received from front entertainment unit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0240 U0241 U0242 U0246 U0253
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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Code

U0245

LAND ROVER U — Network/User

Lost communication with the front entertainment control module

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

Causes

  • Blown fuse or relay powering the entertainment module
  • Poor or missing ground at the module
  • Damaged, corroded, or disconnected connector at the module
  • Open, shorted or high-resistance CAN/LIN wiring between the module and network
  • Module is powered but firmware/software fault or module internal failure
  • Network bus error from another module (bus-off) preventing communications

Symptoms

  • No audio, display, or touchscreen response from front entertainment unit
  • Steering wheel audio controls or microphone for hands-free not working
  • Unable to communicate with the front entertainment module using a scan tool
  • Other modules that rely on messages from the entertainment unit may show related faults or limited functionality
  • Intermittent operation or unit resets on vehicle start

What to check

  • Connect diagnostic scan tool; attempt to communicate with the front entertainment module and read freeze frame/live data
  • Check for other U-codes on the vehicle network (bus-off, other lost-communication codes)
  • Verify related vehicle fuses and relays for the entertainment module
  • Visually inspect the entertainment module connector for corrosion, bent pins, or water intrusion
  • Check battery voltage at the module power pin with ignition on/retain power state as required
  • Check ground(s) at module connector for good contact and low resistance to chassis

Signal parameters

  • CAN bus idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (difference ≈ 0 V)
  • CAN bus dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (difference ≈ 2.0 V)
  • Termination resistance between CAN_H and CAN_L with system powered (two 120 Ω terminators): ≈ 60 Ω (±5 Ω)
  • Open-circuit on CAN pair: infinite/very high resistance; short-to-ground or short-to-battery will show near 0 V or battery voltage on one line
  • Common baud rates: 500 kbps or 250 kbps (vehicle dependent)

Diagnostic algorithm

  1. Use a scan tool to confirm U0245 and record any additional network codes and freeze frame data. Attempt to communicate with the front entertainment control module.
  2. Verify vehicle ignition/wake state required for the front entertainment module. Some units are asleep until a wake message or ignition condition is present; wake network and retry communications.
  3. Check fuses and relays that supply the front entertainment module for proper continuity and voltage. Replace any blown fuses and re-test.
  4. Inspect the module connector for damage, corrosion, bent pins, loose terminals or water intrusion. Secure or repair connector as needed.
  5. Backprobe the module power and ground pins; verify battery voltage (or specified supply) and a good ground reference with key on and with module awake.
  6. Measure CAN_H and CAN_L voltages at the module connector with a multimeter. Compare to expected idle/dominant levels (see signal_params).
  7. If voltages are abnormal or no activity, use an oscilloscope or a CAN bus analyzer at the module and at a known-good node to compare waveforms and verify traffic presence. Look for stuck dominant/recessive, reflections, or noise.
  8. Check resistance between CAN_H and CAN_L at module connector to verify correct termination (~60 Ω). Also check continuity of each wire back to a nearby node or ECU to locate open or short.
  9. Inspect harness along routing (dash, door sills, firewall) for physical damage; repair wiring as needed. Wiggle harness and connectors while monitoring to reproduce intermittent faults.
  10. If wiring and power/ground are confirmed good, consider reprogramming or updating the entertainment module software per factory procedure. Verify correct part number and configuration if unit was recently replaced.
  11. If module still does not communicate and all network/wiring checks are good, bench-test or replace the entertainment control module. After repair or replacement, clear codes and perform full re-test of system and dependent functions.

Likely causes

  • Blown fuse or lost battery feed to front entertainment module
  • Bad ground or poor connector pins at module harness
  • Broken or shorted CAN High/CAN Low pair or damaged wiring in dash or harness paths
  • Entertainment module internal failure or corrupted firmware
  • A different node on the same network is holding the bus in an error state (bus-off)

Fault status

⚠️ Status
Lost Communication With Entertainment Control Module - Front: module not responding or not present on vehicle network; no valid messages received from front entertainment unit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0240 U0241 U0242 U0246 U0253
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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