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Home / DTC / U0563 — Invalid Data Received From Audio Amplifier B

U0563 — Invalid Data Received From Audio Amplifier B

Detailed page for trouble code U0563.

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U0563

Generic U — Network/User

Invalid Data Received From Audio Amplifier B

Brand: Generic
Type: U — Network/User
Views: UK: 16 EN: 32 RU: 21
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Audio Amplifier B (internal electronics or firmware)
  • Damaged or corroded connector or wiring to amplifier (power, ground, or data lines)
  • Loss of module supply voltage or poor ground
  • Bus physical-layer problem (CAN/MOST/LIN short, open, missing termination)
  • Software/version mismatch after updates or incorrect PCM/head unit flash
  • Intermittent connection (moisture, bent pins) or aftermarket audio equipment

Symptoms

  • No sound or partial sound from amplifier-driven speakers
  • Audio distortion, dropouts, or intermittent mute
  • Audio system warning or message on dash (e.g., speaker amplifier fault)
  • Related modules show additional communication or audio-related DTCs
  • Volume or source selection not responding correctly

What to check

  • Read and record all stored and pending DTCs from all modules; note freeze-frame data
  • Inspect amplifier B connector and harness for corrosion, bent pins, water intrusion, or damage
  • Check fuses and relays supplying amplifier B for continuity and proper operation
  • Measure amplifier B supply voltage (key on and during operation) and verify proper ground
  • Use a scan tool to view live data from amplifier B and related modules; note message frequency and fields
  • Check CAN/MOST/LIN bus for errors using scope or diagnostic tool (error frames, missing messages)

Signal parameters

  • Expected amplifier module presence message: periodic (typical 1–10 Hz) message from Audio Amplifier B with specific CAN ID/module address
  • Message payload: consistent length and valid checksum/CRC (no malformed frames)
  • CAN physical idle: CANH and CANL approximately mid-rail (~2.5 V) each; dominant/recessive voltage swings within manufacturer spec
  • Supply voltage at amplifier: battery voltage with ignition on (~11–14.5 V) and no excessive drop under load
  • Ground resistance: low ohms to chassis (typically
  • LIN (if used): idle ~battery/2 (per LIN spec) and expected wake/poll timing

Diagnostic algorithm

  1. Use a factory-level or professional scan tool. Read U0563 and any related codes from all modules; record groups/addresses and freeze data.
  2. Inspect the amplifier B connector and harness for damage, corrosion, or water intrusion. Repair any obvious issues.
  3. Verify power and ground at amplifier B (key on). Check associated fuses and relays. Repair wiring or replace blown fuse/relay as required.
  4. With a scope or CAN/MOST analyzer, monitor the audio network while reproducing the fault. Look for missing, corrupted, or irregular messages from amplifier B and for bus error frames.
  5. Wiggle test wiring and connectors while monitoring bus traffic to find intermittent faults.
  6. If bus physical layer is suspect, check termination resistors and continuity to other modules; repair shorts/opens.

Likely causes

  • Amplifier B is not powered or has high supply impedance (blown fuse, bad relay, broken wire)
  • Ground(s) for amplifier B are corroded or high resistance
  • CAN/MOST bus wiring to amplifier B has short to battery/ground or is open
  • Connector pins are bent, pushed out, or corroded, causing corrupted data
  • Amplifier firmware or head unit software incompatible after service
  • Intermittent wiring fault causing occasional frame corruption

Fault status

⚠️ Status
Invalid data received from Audio Amplifier B — communication frames from the amplifier were missing, malformed, or failed integrity checks. Check amplifier, power/ground, connectors and network physical layer.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

U0560 U0561 U0562 U0564 U0100 U0073
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Code

U0563

HYUNDAI U — Network/User

Invalid Data Received From Audio Amplifier “B”

Brand: HYUNDAI
Type: U — Network/User
Views: UK: 11 EN: 16 RU: 12
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Audio Amplifier B (internal electronics or firmware)
  • Damaged or corroded connector or wiring to amplifier (power, ground, or data lines)
  • Loss of module supply voltage or poor ground
  • Bus physical-layer problem (CAN/MOST/LIN short, open, missing termination)
  • Software/version mismatch after updates or incorrect PCM/head unit flash
  • Intermittent connection (moisture, bent pins) or aftermarket audio equipment

Symptoms

  • No sound or partial sound from amplifier-driven speakers
  • Audio distortion, dropouts, or intermittent mute
  • Audio system warning or message on dash (e.g., speaker amplifier fault)
  • Related modules show additional communication or audio-related DTCs
  • Volume or source selection not responding correctly

What to check

  • Read and record all stored and pending DTCs from all modules; note freeze-frame data
  • Inspect amplifier B connector and harness for corrosion, bent pins, water intrusion, or damage
  • Check fuses and relays supplying amplifier B for continuity and proper operation
  • Measure amplifier B supply voltage (key on and during operation) and verify proper ground
  • Use a scan tool to view live data from amplifier B and related modules; note message frequency and fields
  • Check CAN/MOST/LIN bus for errors using scope or diagnostic tool (error frames, missing messages)

Signal parameters

  • Expected amplifier module presence message: periodic (typical 1–10 Hz) message from Audio Amplifier B with specific CAN ID/module address
  • Message payload: consistent length and valid checksum/CRC (no malformed frames)
  • CAN physical idle: CANH and CANL approximately mid-rail (~2.5 V) each; dominant/recessive voltage swings within manufacturer spec
  • Supply voltage at amplifier: battery voltage with ignition on (~11–14.5 V) and no excessive drop under load
  • Ground resistance: low ohms to chassis (typically
  • LIN (if used): idle ~battery/2 (per LIN spec) and expected wake/poll timing

Diagnostic algorithm

  1. Use a factory-level or professional scan tool. Read U0563 and any related codes from all modules; record groups/addresses and freeze data.
  2. Inspect the amplifier B connector and harness for damage, corrosion, or water intrusion. Repair any obvious issues.
  3. Verify power and ground at amplifier B (key on). Check associated fuses and relays. Repair wiring or replace blown fuse/relay as required.
  4. With a scope or CAN/MOST analyzer, monitor the audio network while reproducing the fault. Look for missing, corrupted, or irregular messages from amplifier B and for bus error frames.
  5. Wiggle test wiring and connectors while monitoring bus traffic to find intermittent faults.
  6. If bus physical layer is suspect, check termination resistors and continuity to other modules; repair shorts/opens.

Likely causes

  • Amplifier B is not powered or has high supply impedance (blown fuse, bad relay, broken wire)
  • Ground(s) for amplifier B are corroded or high resistance
  • CAN/MOST bus wiring to amplifier B has short to battery/ground or is open
  • Connector pins are bent, pushed out, or corroded, causing corrupted data
  • Amplifier firmware or head unit software incompatible after service
  • Intermittent wiring fault causing occasional frame corruption

Fault status

⚠️ Status
Invalid data received from Audio Amplifier B — communication frames from the amplifier were missing, malformed, or failed integrity checks. Check amplifier, power/ground, connectors and network physical layer.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

U0560 U0561 U0562 U0564 U0100 U0073
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