Code
U0462
Generic
U — Network/User
Invalid Data Received From Compass Module
Views:
UK: 13
EN: 19
RU: 13
AI status
Completed
Completed
100%
Causes
- Faulty or failed compass module
- Corroded, loose, bent, or damaged connector or wiring to the compass module
- Intermittent or missing power or ground at the compass module
- CAN or LIN bus wiring fault (open, short to battery/ground, short between CAN_H and CAN_L)
- Missing or incorrect termination resistor or bus topology problem
- Software mismatch, module not programmed or incorrect calibration
Symptoms
- Compass heading incorrect, erratic, or not displayed
- Instrument cluster or navigation screen displays compass error or blank field
- Illumination of a network communication or warning lamp
- Stored U0462 DTC and possibly related network communication codes
- Feature dependent on compass (e.g., heading display, GPS heading assist) not functioning
What to check
- Read all stored DTCs and freeze-frame data from all network modules; note related network codes
- Inspect compass module connector(s) and harness for corrosion, bent pins, water intrusion or physical damage
- Verify module supply voltage and ground at the connector with ignition ON and cranking as appropriate
- Use a scan tool or CAN/LIN sniffer to check for presence and frequency of the compass message on the bus
- Check for CAN bus errors (error counters, bus-off events) and inspect termination resistors
- Compare compass module part number and software level to vehicle service data/TSBs
Signal parameters
- Bus type: CAN or LIN (vehicle dependent) — check vehicle-specific documentation
- Message ID: manufacturer-specific CAN ID for compass data (varies by vehicle)
- Typical message frequency: low rate (often 1–10 Hz) for heading/status messages
- Data length: commonly up to 8 bytes on CAN; payload typically includes heading (0–359°), status/valid flag, and checksum
- Heading value expected range: 0–359 degrees (or 0–255 scaled on some systems); invalid values or out-of-range indicate corruption
- Status/valid bit: a byte/bit indicating data validity — if flagged invalid, module should not transmit usable heading
Diagnostic algorithm
- Connect a professional scan tool and read all network DTCs and freeze-frame. Note timestamps and related communication codes.
- Check for technical service bulletins (TSBs) or software updates related to compass or network communication for this model.
- Visually inspect the compass module, antenna (if separate), connectors and wiring for damage, corrosion, or poor connections.
- Verify battery voltage and check power/ignition feed and ground at the module connector. Repair any poor power/ground connections.
- With a scope or CAN/LIN bus analyzer, confirm the compass module message is present and within expected frequency and format. Capture raw frames and inspect payload and checksum.
- If no message is present, probe CAN_H/CAN_L for proper physical signals and check termination resistors (≈60 ohm across CAN_H/L for two 120Ω in parallel) per vehicle spec.
- Perform a wiggle test on harness and connectors while monitoring the bus to identify intermittent faults.
- If bad data is present (out-of-range heading, bad checksum), isolate whether corruption originates at module or is introduced on the bus by disconnecting other devices per service manual and retesting.
- Verify module part number and software level; reflash or update module software if required by service information.
- If wiring and bus check good but module still transmits invalid data, replace the compass module and re-check. After repair, clear DTCs and verify repair with road test and re-check for reappearance.
- If network errors persist after module replacement, continue to isolate bus wiring, termination, and other modules on the same network.
Likely causes
- Damaged harness or connector at the compass module (water intrusion/corrosion)
- Compass module internal failure producing invalid payload
- Loss of proper supply voltage or ground to the module
- CAN bus bit errors or other modules causing bus congestion/errors
- Module replaced and not programmed/calibrated correctly
Fault status
Status
U0462 — Invalid data received from compass module: the network received corrupted or out-of-range compass data or a communication fault was detected.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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Code
U0462
HYUNDAI
U — Network/User
Invalid Data Received From Compass Module
Views:
UK: 10
EN: 21
RU: 10
AI status
Completed
Completed
100%
Causes
- Faulty or failed compass module
- Corroded, loose, bent, or damaged connector or wiring to the compass module
- Intermittent or missing power or ground at the compass module
- CAN or LIN bus wiring fault (open, short to battery/ground, short between CAN_H and CAN_L)
- Missing or incorrect termination resistor or bus topology problem
- Software mismatch, module not programmed or incorrect calibration
Symptoms
- Compass heading incorrect, erratic, or not displayed
- Instrument cluster or navigation screen displays compass error or blank field
- Illumination of a network communication or warning lamp
- Stored U0462 DTC and possibly related network communication codes
- Feature dependent on compass (e.g., heading display, GPS heading assist) not functioning
What to check
- Read all stored DTCs and freeze-frame data from all network modules; note related network codes
- Inspect compass module connector(s) and harness for corrosion, bent pins, water intrusion or physical damage
- Verify module supply voltage and ground at the connector with ignition ON and cranking as appropriate
- Use a scan tool or CAN/LIN sniffer to check for presence and frequency of the compass message on the bus
- Check for CAN bus errors (error counters, bus-off events) and inspect termination resistors
- Compare compass module part number and software level to vehicle service data/TSBs
Signal parameters
- Bus type: CAN or LIN (vehicle dependent) — check vehicle-specific documentation
- Message ID: manufacturer-specific CAN ID for compass data (varies by vehicle)
- Typical message frequency: low rate (often 1–10 Hz) for heading/status messages
- Data length: commonly up to 8 bytes on CAN; payload typically includes heading (0–359°), status/valid flag, and checksum
- Heading value expected range: 0–359 degrees (or 0–255 scaled on some systems); invalid values or out-of-range indicate corruption
- Status/valid bit: a byte/bit indicating data validity — if flagged invalid, module should not transmit usable heading
Diagnostic algorithm
- Connect a professional scan tool and read all network DTCs and freeze-frame. Note timestamps and related communication codes.
- Check for technical service bulletins (TSBs) or software updates related to compass or network communication for this model.
- Visually inspect the compass module, antenna (if separate), connectors and wiring for damage, corrosion, or poor connections.
- Verify battery voltage and check power/ignition feed and ground at the module connector. Repair any poor power/ground connections.
- With a scope or CAN/LIN bus analyzer, confirm the compass module message is present and within expected frequency and format. Capture raw frames and inspect payload and checksum.
- If no message is present, probe CAN_H/CAN_L for proper physical signals and check termination resistors (≈60 ohm across CAN_H/L for two 120Ω in parallel) per vehicle spec.
- Perform a wiggle test on harness and connectors while monitoring the bus to identify intermittent faults.
- If bad data is present (out-of-range heading, bad checksum), isolate whether corruption originates at module or is introduced on the bus by disconnecting other devices per service manual and retesting.
- Verify module part number and software level; reflash or update module software if required by service information.
- If wiring and bus check good but module still transmits invalid data, replace the compass module and re-check. After repair, clear DTCs and verify repair with road test and re-check for reappearance.
- If network errors persist after module replacement, continue to isolate bus wiring, termination, and other modules on the same network.
Likely causes
- Damaged harness or connector at the compass module (water intrusion/corrosion)
- Compass module internal failure producing invalid payload
- Loss of proper supply voltage or ground to the module
- CAN bus bit errors or other modules causing bus congestion/errors
- Module replaced and not programmed/calibrated correctly
Fault status
Status
U0462 — Invalid data received from compass module: the network received corrupted or out-of-range compass data or a communication fault was detected.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
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