Code
U0598
Generic
U — Network/User
Invalid Data Received From AC/DC Converter Control Module B
AI status
Completed
Completed
100%
Causes
- Faulty AC/DC converter control module B (hardware or firmware)
- Corroded, loose or damaged connector/cavity at the converter control module
- Damaged wiring harness, chafing or short to ground/voltage
- Low battery/auxiliary voltage or poor ground affecting module operation
- CAN/LIN data bus error, missing termination, or high bus error rate
- Software version mismatch or failed module programming
Symptoms
- Malfunction indicator lamp (MIL) or dash message indicating communication error
- Loss or intermittent operation of AC-to-DC or DC-to-AC conversion functions
- Reduced charging or power availability from the converter
- Erratic converter status values or missing data in network scan tool
- Multiple communication-related DTCs present on scan
What to check
- Read all stored and pending DTCs and freeze frame data from all modules using a capable scan tool
- Check for related U-codes or module-specific codes (look for both transmitter and receiver-side faults)
- Verify battery/auxiliary voltage and proper module supply/ground at rest and during engine/vehicle operation
- Visually inspect connectors and wiring to AC/DC Converter Control Module B for corrosion, damage, or loose pins
- Confirm the converter module appears on the vehicle network (module identified by scan tool) and check live data availability
- Monitor CAN/LIN bus error counters and message frequency for the converter module
Signal parameters
- CAN/LIN message: AC/DC Converter B status — expected fields: enable/disable status (binary), output voltage (V), output current (A), converter temperature (°C), fault/status bits
- Message timing/frequency: periodic status messages at manufacturer-defined intervals (verify presence and consistent timing)
- Signal validity: expected numeric ranges and checksum/CRC validity for messages from module B
- Network health: CAN bus message error counts, bus load and presence of other module messages
- Power rails: module supply voltage (nominal vehicle aux voltage) and ground continuity
Diagnostic algorithm
- Safety: Follow high-voltage and service manual safety procedures before working on EV/HEV high-voltage components.
- Connect a scan tool and record all current and history DTCs, freeze frame, and live data from power electronics and network controllers.
- Check for related codes (U0597, U0100, U0200, U0616 or other network/comms faults) that may indicate broader network issues.
- Verify module presence on network. If the module is not present, inspect power and ground at the module connector.
- Inspect wiring harness and connector for converter B for corrosion, bent pins, water intrusion, or damage; repair as required.
- Verify supply voltage and ground at the module with engine/vehicle powered and during any relevant operating conditions; repair any supply issues.
- Monitor live CAN/LIN communications: confirm periodic messages from converter B, check message content ranges, and watch for CRC/format errors or intermittent drops.
- Perform wiggle test on wiring with scan tool monitoring to see if faults change with movement (use caution around HV harnesses).
- If available, use an oscilloscope to check CANH/CANL differential waveform quality at the module and at a known-good network node.
- If wiring and supplies are good but messages are invalid, attempt a software update/reflash of converter module B per manufacturer procedures.
- If module fails to communicate correctly after software update and bench/network checks, consider replacing AC/DC Converter Control Module B and then recheck for codes.
- After repair, clear codes and verify proper operation over a drive cycle; confirm no recurrence and that related systems behave normally.
Likely causes
- Corroded or loose connector at AC/DC Converter Control Module B
- Intermittent CAN bus wiring fault between module B and vehicle network
- Converter module B internal fault or failed communications interface
- Low supply voltage or high resistance ground to converter module
- Recent module replacement with incompatible firmware
Fault status
Status
Invalid data received from AC/DC Converter Control Module B — communication or data integrity error (inspect wiring, module and network).
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
Repair manuals
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Code
U0598
HYUNDAI
U — Network/User
Invalid Data Received From AC to DC Converter Control Module “B”
AI status
Completed
Completed
100%
Causes
- Faulty AC/DC converter control module B (hardware or firmware)
- Corroded, loose or damaged connector/cavity at the converter control module
- Damaged wiring harness, chafing or short to ground/voltage
- Low battery/auxiliary voltage or poor ground affecting module operation
- CAN/LIN data bus error, missing termination, or high bus error rate
- Software version mismatch or failed module programming
Symptoms
- Malfunction indicator lamp (MIL) or dash message indicating communication error
- Loss or intermittent operation of AC-to-DC or DC-to-AC conversion functions
- Reduced charging or power availability from the converter
- Erratic converter status values or missing data in network scan tool
- Multiple communication-related DTCs present on scan
What to check
- Read all stored and pending DTCs and freeze frame data from all modules using a capable scan tool
- Check for related U-codes or module-specific codes (look for both transmitter and receiver-side faults)
- Verify battery/auxiliary voltage and proper module supply/ground at rest and during engine/vehicle operation
- Visually inspect connectors and wiring to AC/DC Converter Control Module B for corrosion, damage, or loose pins
- Confirm the converter module appears on the vehicle network (module identified by scan tool) and check live data availability
- Monitor CAN/LIN bus error counters and message frequency for the converter module
Signal parameters
- CAN/LIN message: AC/DC Converter B status — expected fields: enable/disable status (binary), output voltage (V), output current (A), converter temperature (°C), fault/status bits
- Message timing/frequency: periodic status messages at manufacturer-defined intervals (verify presence and consistent timing)
- Signal validity: expected numeric ranges and checksum/CRC validity for messages from module B
- Network health: CAN bus message error counts, bus load and presence of other module messages
- Power rails: module supply voltage (nominal vehicle aux voltage) and ground continuity
Diagnostic algorithm
- Safety: Follow high-voltage and service manual safety procedures before working on EV/HEV high-voltage components.
- Connect a scan tool and record all current and history DTCs, freeze frame, and live data from power electronics and network controllers.
- Check for related codes (U0597, U0100, U0200, U0616 or other network/comms faults) that may indicate broader network issues.
- Verify module presence on network. If the module is not present, inspect power and ground at the module connector.
- Inspect wiring harness and connector for converter B for corrosion, bent pins, water intrusion, or damage; repair as required.
- Verify supply voltage and ground at the module with engine/vehicle powered and during any relevant operating conditions; repair any supply issues.
- Monitor live CAN/LIN communications: confirm periodic messages from converter B, check message content ranges, and watch for CRC/format errors or intermittent drops.
- Perform wiggle test on wiring with scan tool monitoring to see if faults change with movement (use caution around HV harnesses).
- If available, use an oscilloscope to check CANH/CANL differential waveform quality at the module and at a known-good network node.
- If wiring and supplies are good but messages are invalid, attempt a software update/reflash of converter module B per manufacturer procedures.
- If module fails to communicate correctly after software update and bench/network checks, consider replacing AC/DC Converter Control Module B and then recheck for codes.
- After repair, clear codes and verify proper operation over a drive cycle; confirm no recurrence and that related systems behave normally.
Likely causes
- Corroded or loose connector at AC/DC Converter Control Module B
- Intermittent CAN bus wiring fault between module B and vehicle network
- Converter module B internal fault or failed communications interface
- Low supply voltage or high resistance ground to converter module
- Recent module replacement with incompatible firmware
Fault status
Status
Invalid data received from AC/DC Converter Control Module B — communication or data integrity error (inspect wiring, module and network).
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
Repair manuals
Manual library for HYUNDAI
371
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