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Home / DTC / U045E — Invalid Data Received From Automated Driving System Control Module B

U045E — Invalid Data Received From Automated Driving System Control Module B

Detailed page for trouble code U045E.

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Code

U045E

Generic U — Network/User

Invalid Data Received From Automated Driving System Control Module B

Brand: Generic
Type: U — Network/User
Views: UK: 12 EN: 15 RU: 13
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Page language: EN

Causes

  • Corrupted or out-of-spec messages from ADS Control Module B
  • Faulty ADS Control Module B hardware or firmware
  • CAN/LIN/FlexRay bus errors or high bus load
  • Damaged wiring, poor connector contacts, or grounding issues between modules
  • Incorrect module programming or configuration mismatch after service/update
  • Other modules sending incorrect data that reference ADS Control Module B signals

Symptoms

  • Automated driving or driver assistance features disabled or limited
  • Warning lamp or message related to automated driving or module communication
  • Reduced vehicle automation performance or fallback to manual control
  • Stored communication-related DTCs and freeze-frame data
  • Intermittent or consistent loss of expected ADS messages on network scan

What to check

  • Read all stored and pending DTCs (all modules) and capture freeze-frame data
  • Verify vehicle is in a safe state and disable automated driving before troubleshooting
  • Perform a CAN/FlexRay/LIN bus health scan with a diagnostic tool (check error counters, bus load, and active faults)
  • Monitor ADS Control Module B message traffic with a module-capable scan tool or CAN bus analyzer (check IDs, cycle time, DLC, payload, checksum)
  • Visually inspect wiring and connectors at ADS Control Module B and adjacent modules for damage, corrosion, or loose pins
  • Check module power and ground voltages at the connector with ignition states as specified by manufacturer

Signal parameters

  • Message ID (example) 0x3A5 — cycle 20–100 ms — DLC 8 — fields: control_state (0–255), trajectory_valid (0/1), status_flags (bitmask), checksum/CRC
  • Expected cycle time tolerance: ±10–20% and low jitter; missing >3 consecutive cycles is abnormal
  • Valid value ranges: control_state only within documented enumeration; invalid enumerations indicate bad data
  • Checksum/CRC field must match computed value for payload; mismatch indicates corruption
  • Transmitting node address/module ID should match ADS Control Module B identifier in vehicle topology

Diagnostic algorithm

  1. Ensure operator safety: park vehicle, apply parking brake, disable automated driving and follow manufacturer safety procedures.
  2. Connect a capable diagnostic scan tool and read U045E plus any related U-codes and module-specific codes; record freeze-frame and snapshot data.
  3. Perform a network traffic capture while the fault is present: verify ADS Control Module B messages are present, check message IDs, cycle times, DLC, payload content and checksum/CRC.
  4. If messages are missing or malformed, inspect ADS Control Module B power (VBATT, ignition-switched power) and ground circuits at the module connector for proper voltages and resistance to chassis ground.
  5. Visually inspect harness and connector for damage, corrosion, bent pins, or moisture. Wiggle test while monitoring bus traffic for intermittent faults.
  6. If wiring and power/ground are good, attempt a reflash or confirm correct firmware/calibration level of ADS Control Module B and related controllers per service bulletin; update if needed.
  7. If reprogramming does not clear the fault and diagnostics point to corrupted transmissions, replace ADS Control Module B or its connector pigtail per manufacturer procedures.
  8. After any repair, clear codes and verify the fault does not return; perform functional tests of automated driving features and a final network health check.

Likely causes

  • Intermittent or missing CAN frames from ADS Control Module B
  • Incorrect payload or checksum/CRC on ADS B messages
  • Power supply or ground fault at ADS Control Module B
  • Module software version incompatibility after reflash or replacement
  • Connector corrosion or pin damage causing bit errors

Fault status

⚠️ Status
Module reported reception/transmission of invalid ADS Control Module B data on vehicle network; automated driving data validation failed.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3 hours

Similar codes

U0401 U0415 U0450 U0463 U0424
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