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Home / DTC / U0463 — Invalid Data Received From Navigation Display Module

U0463 — Invalid Data Received From Navigation Display Module

Detailed page for trouble code U0463.

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Code

U0463

Generic U — Network/User

Invalid Data Received From Navigation Display Module

Brand: Generic
Type: U — Network/User
Views: UK: 17 EN: 18 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Navigation Display Module (NDM) or internal software corruption
  • Open, shorted, or corroded wiring/connectors between NDM and vehicle network (CAN/LIN)
  • Low or intermittent module power or ground
  • CAN/LIN bus errors, missing termination, or high bus load
  • Incompatible or out-of-date module software/calibration
  • Intermittent network interference or electromagnetic noise

Symptoms

  • Navigation display blank, frozen, or showing corrupted information
  • Loss of navigation features (map, guidance) or incorrect location
  • Communication-related warning or text message on dash
  • One or more network modules showing communication errors
  • DTC stored in vehicle network and possible reduced functionality of affected systems
  • Intermittent faults that may clear and reappear

What to check

  • Read vehicle network for U0463 and any related U or B codes; note pending/confirmed and freeze frame
  • Try to communicate with the NDM using a diagnostic scanner; verify module responds
  • Inspect NDM connectors and wiring for corrosion, bent pins, water damage, or loose terminals
  • Check battery voltage and NDM power/ground circuits with key on/engine off
  • Scan for CAN/LIN bus errors and counter messages (use oscilloscope or advanced scan tool)
  • Compare NDM software/part number to manufacturer specification and TSBs

Signal parameters

  • CAN_H idle ~2.5 V, CAN_L idle ~2.5 V; differential ~0 V at rest, dominant ~2.5 V difference
  • Typical CAN bus baud rates: 500 kb/s or 250 kb/s (verify for vehicle)
  • Message ID(s) used by NDM for navigation/status (manufacturer-specific)
  • Message frequency: periodic NDM heartbeat and navigation update intervals (seconds or faster)
  • Message length (DLC) and expected payload fields: header, counters, checksums (module-specific)
  • Error counters: TX/RX error counters, bus-off status

Diagnostic algorithm

  1. Retrieve and record U0463 plus any other stored network codes; note ignition/run state and freeze frame data.
  2. Attempt to communicate directly with the NDM via dealer or advanced scan tool; if no response, suspect power/wiring or module failure.
  3. Visually inspect and wiggle-test NDM connectors and harness while monitoring code status; repair any damage and retest.
  4. Verify NDM power and ground circuits for proper voltage and low resistance to chassis ground.
  5. Use an oscilloscope or CAN bus monitor to observe CAN_H/CAN_L signals at the NDM connector; look for noise, missing frames, or bus-off conditions.
  6. Check for related modules reporting errors; isolate by disconnecting suspect nodes (follow manufacturer safety procedures) to see if fault clears.
  7. Verify software/firmware calibration levels for NDM and other related modules; perform updates or reprogramming if required.
  8. If wiring and power are good and software is current, replace or reflash the NDM per manufacturer's procedures and clear codes.
  9. After repairs, clear codes and perform a drive cycle or reproduce conditions to confirm fault does not return.

Likely causes

  • Poor connector/ground at the NDM (water intrusion, corrosion)
  • NDM firmware mismatch after repair or update
  • CAN bus wiring damage near NDM (chafing, pinched harness)
  • Intermittent supply voltage to the NDM

Fault status

⚠️ Status
Communication/data integrity fault recorded for Navigation Display Module. Code may be stored as intermittent or permanent depending on manufacturer; related network modules may also report communication errors.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3 hours

Similar codes

U0401 U0415 U0462 U0073 U0100
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Code

U0463

HYUNDAI U — Network/User

Invalid Data Received From Navigation Display Module

Brand: HYUNDAI
Type: U — Network/User
Views: UK: 7 EN: 12 RU: 15
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty Navigation Display Module (NDM) or internal software corruption
  • Open, shorted, or corroded wiring/connectors between NDM and vehicle network (CAN/LIN)
  • Low or intermittent module power or ground
  • CAN/LIN bus errors, missing termination, or high bus load
  • Incompatible or out-of-date module software/calibration
  • Intermittent network interference or electromagnetic noise

Symptoms

  • Navigation display blank, frozen, or showing corrupted information
  • Loss of navigation features (map, guidance) or incorrect location
  • Communication-related warning or text message on dash
  • One or more network modules showing communication errors
  • DTC stored in vehicle network and possible reduced functionality of affected systems
  • Intermittent faults that may clear and reappear

What to check

  • Read vehicle network for U0463 and any related U or B codes; note pending/confirmed and freeze frame
  • Try to communicate with the NDM using a diagnostic scanner; verify module responds
  • Inspect NDM connectors and wiring for corrosion, bent pins, water damage, or loose terminals
  • Check battery voltage and NDM power/ground circuits with key on/engine off
  • Scan for CAN/LIN bus errors and counter messages (use oscilloscope or advanced scan tool)
  • Compare NDM software/part number to manufacturer specification and TSBs

Signal parameters

  • CAN_H idle ~2.5 V, CAN_L idle ~2.5 V; differential ~0 V at rest, dominant ~2.5 V difference
  • Typical CAN bus baud rates: 500 kb/s or 250 kb/s (verify for vehicle)
  • Message ID(s) used by NDM for navigation/status (manufacturer-specific)
  • Message frequency: periodic NDM heartbeat and navigation update intervals (seconds or faster)
  • Message length (DLC) and expected payload fields: header, counters, checksums (module-specific)
  • Error counters: TX/RX error counters, bus-off status

Diagnostic algorithm

  1. Retrieve and record U0463 plus any other stored network codes; note ignition/run state and freeze frame data.
  2. Attempt to communicate directly with the NDM via dealer or advanced scan tool; if no response, suspect power/wiring or module failure.
  3. Visually inspect and wiggle-test NDM connectors and harness while monitoring code status; repair any damage and retest.
  4. Verify NDM power and ground circuits for proper voltage and low resistance to chassis ground.
  5. Use an oscilloscope or CAN bus monitor to observe CAN_H/CAN_L signals at the NDM connector; look for noise, missing frames, or bus-off conditions.
  6. Check for related modules reporting errors; isolate by disconnecting suspect nodes (follow manufacturer safety procedures) to see if fault clears.
  7. Verify software/firmware calibration levels for NDM and other related modules; perform updates or reprogramming if required.
  8. If wiring and power are good and software is current, replace or reflash the NDM per manufacturer's procedures and clear codes.
  9. After repairs, clear codes and perform a drive cycle or reproduce conditions to confirm fault does not return.

Likely causes

  • Poor connector/ground at the NDM (water intrusion, corrosion)
  • NDM firmware mismatch after repair or update
  • CAN bus wiring damage near NDM (chafing, pinched harness)
  • Intermittent supply voltage to the NDM

Fault status

⚠️ Status
Communication/data integrity fault recorded for Navigation Display Module. Code may be stored as intermittent or permanent depending on manufacturer; related network modules may also report communication errors.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3 hours

Similar codes

U0401 U0415 U0462 U0073 U0100
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