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Home / DTC / U0497 — Invalid Data Received From Entertainment Control Module - Rear A

U0497 — Invalid Data Received From Entertainment Control Module - Rear A

Detailed page for trouble code U0497.

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11,841generic
22,491specific
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Code

U0497

Generic U — Network/User

Invalid Data Received From Entertainment Control Module - Rear A

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

Causes

  • Faulty Rear A entertainment control module (hardware or corrupted firmware)
  • Damaged or corroded connector at the Rear A module
  • Open, shorted, or intermittent wiring on the vehicle data bus (CAN/LIN) to the Rear A module
  • Missing or incorrect bus termination resistor or wiring fault causing reflections
  • Poor or intermittent power or ground to the Rear A module
  • Aftermarket audio/video device or adapter interfering with network messages

Symptoms

  • Rear entertainment screen(s) blank, frozen, or displaying errors
  • Audio/video sources for rear seats not working or intermittent
  • Warning or information messages about entertainment or media systems
  • Related modules reporting additional network communication U-codes
  • Intermittent operation that may be influenced by door/trunk movement or vehicle vibration

What to check

  • Use a scan tool to read U0497 plus any other active/pending network DTCs and freeze-frame data
  • Check ignition and accessory power to the Rear A module; measure module supply voltage with key on
  • Inspect the rear entertainment module connector(s) for corrosion, bent pins, water intrusion, or damage
  • Verify good ground at the module; measure voltage drop on ground with a load if needed
  • Measure CAN bus resistance across CAN_H and CAN_L (expected ~60 Ω with both termination resistors present)
  • Check for CAN bus short to battery or ground (resistance from CAN_H/CAN_L to battery + and to ground)

Signal parameters

  • Typical CAN idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (both sit near mid-supply)
  • Typical CAN dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (differential ≈ 2.0 V)
  • Expected bus resistance (two 120 Ω terminators in parallel): ≈ 60 Ω across CAN_H–CAN_L
  • Module supply voltage: battery voltage with ignition/accessory on (nominal 11–14 V)
  • Ground voltage: close to 0.0 V (voltage drop under load should be

Diagnostic algorithm

  1. Retrieve all network DTCs with a capable scan tool. Note which modules report U0497 and any other U-codes.
  2. Clear codes and see if U0497 returns immediately or only after a specific event (start, accessory on, using rear controls).
  3. Inspect the Rear A entertainment module connector and harness for corrosion, damage, or water intrusion; repair as needed.
  4. Verify module supply and ground: with connector connected, measure battery voltage at the module power pin(s) and check ground voltage drop while operating the system.
  5. Measure resistance across CAN_H and CAN_L with ignition off; expect ≈60 Ω. Check resistance from each bus line to chassis ground and to battery positive to detect shorts.
  6. With a scan tool showing live network data, monitor for bus-off states or repeating error frames. Perform a wiggle test on harness while watching for code set or message corruption.
  7. If available, capture CAN waveforms with an oscilloscope to identify missing dominant bits, excessive ringing, or very noisy signals. Focus on rear harness sections and module pins.
  8. If wiring and power/ground check OK, attempt a known-good Rear A module (or swap identical module if available) or reflash/update module software per manufacturer procedure.
  9. Remove or disable aftermarket audio/video devices and retest the bus for restoration of normal messages.
  10. After repairs, clear codes and road test to confirm the fault does not return. If intermittent, continue monitoring and inspect for harness movement/abrasion points.

Likely causes

  • Corroded/damaged connector at rear entertainment module or harness chafe
  • CAN bus wiring short to battery or ground near rear of vehicle
  • Rear A module power/ground fault (low supply voltage or high resistance ground)
  • Software/firmware fault in the Rear A entertainment module
  • Another control module on the same bus sending malformed messages

Fault status

⚠️ Status
Invalid data received from Entertainment Control Module - Rear A. Indicates the receiving module detected corrupted/unexpected message payload or protocol error from the Rear A entertainment node on the vehicle network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

U0497

HYUNDAI U — Network/User

Invalid Data Received From Entertainment Control Module Rear “A”

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

Causes

  • Faulty Rear A entertainment control module (hardware or corrupted firmware)
  • Damaged or corroded connector at the Rear A module
  • Open, shorted, or intermittent wiring on the vehicle data bus (CAN/LIN) to the Rear A module
  • Missing or incorrect bus termination resistor or wiring fault causing reflections
  • Poor or intermittent power or ground to the Rear A module
  • Aftermarket audio/video device or adapter interfering with network messages

Symptoms

  • Rear entertainment screen(s) blank, frozen, or displaying errors
  • Audio/video sources for rear seats not working or intermittent
  • Warning or information messages about entertainment or media systems
  • Related modules reporting additional network communication U-codes
  • Intermittent operation that may be influenced by door/trunk movement or vehicle vibration

What to check

  • Use a scan tool to read U0497 plus any other active/pending network DTCs and freeze-frame data
  • Check ignition and accessory power to the Rear A module; measure module supply voltage with key on
  • Inspect the rear entertainment module connector(s) for corrosion, bent pins, water intrusion, or damage
  • Verify good ground at the module; measure voltage drop on ground with a load if needed
  • Measure CAN bus resistance across CAN_H and CAN_L (expected ~60 Ω with both termination resistors present)
  • Check for CAN bus short to battery or ground (resistance from CAN_H/CAN_L to battery + and to ground)

Signal parameters

  • Typical CAN idle (recessive): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (both sit near mid-supply)
  • Typical CAN dominant: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (differential ≈ 2.0 V)
  • Expected bus resistance (two 120 Ω terminators in parallel): ≈ 60 Ω across CAN_H–CAN_L
  • Module supply voltage: battery voltage with ignition/accessory on (nominal 11–14 V)
  • Ground voltage: close to 0.0 V (voltage drop under load should be

Diagnostic algorithm

  1. Retrieve all network DTCs with a capable scan tool. Note which modules report U0497 and any other U-codes.
  2. Clear codes and see if U0497 returns immediately or only after a specific event (start, accessory on, using rear controls).
  3. Inspect the Rear A entertainment module connector and harness for corrosion, damage, or water intrusion; repair as needed.
  4. Verify module supply and ground: with connector connected, measure battery voltage at the module power pin(s) and check ground voltage drop while operating the system.
  5. Measure resistance across CAN_H and CAN_L with ignition off; expect ≈60 Ω. Check resistance from each bus line to chassis ground and to battery positive to detect shorts.
  6. With a scan tool showing live network data, monitor for bus-off states or repeating error frames. Perform a wiggle test on harness while watching for code set or message corruption.
  7. If available, capture CAN waveforms with an oscilloscope to identify missing dominant bits, excessive ringing, or very noisy signals. Focus on rear harness sections and module pins.
  8. If wiring and power/ground check OK, attempt a known-good Rear A module (or swap identical module if available) or reflash/update module software per manufacturer procedure.
  9. Remove or disable aftermarket audio/video devices and retest the bus for restoration of normal messages.
  10. After repairs, clear codes and road test to confirm the fault does not return. If intermittent, continue monitoring and inspect for harness movement/abrasion points.

Likely causes

  • Corroded/damaged connector at rear entertainment module or harness chafe
  • CAN bus wiring short to battery or ground near rear of vehicle
  • Rear A module power/ground fault (low supply voltage or high resistance ground)
  • Software/firmware fault in the Rear A entertainment module
  • Another control module on the same bus sending malformed messages

Fault status

⚠️ Status
Invalid data received from Entertainment Control Module - Rear A. Indicates the receiving module detected corrupted/unexpected message payload or protocol error from the Rear A entertainment node on the vehicle network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0496 U0100 U0073 U0401 U0155
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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