U2510

Code

LAND ROVER U — Network/User

CAN - invalid data for vehicle security

Brand: LAND ROVER

Type: U — Network/User

Views: UK: 28 EN: 48 RU: 30

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Page language: EN

Causes

Faulty or intermittent CAN bus wiring or connectors (corrosion, chafing, water ingress).
Failing or misprogrammed module (BCM, immobilizer, instrument cluster, security control unit).
Low or unstable battery/ignition supply voltage causing communication errors.
Aftermarket alarm/immobilizer or remote starter interfering with CAN/security messages.
CAN bus termination or grounding fault.
Software mismatch, corrupt module firmware, or missing calibration—module sending/receiving unexpected data.

Symptoms

Security-related warnings on dash (immobilizer, key fault, security active).
Vehicle may not start or may go to limp mode.
Intermittent loss of functions controlled by BCM (door locks, remote unlock, alarm).
Other U-codes or multiple CAN communication codes present.
Parasitic battery drain or unexplained electrical oddities after vehicle sits.

What to check

Read all modules with a capable OBD/CAN scanner and record all U and B codes and freeze frame data.
Check battery voltage and state of charge; ensure battery and charging system are within spec during diagnosis.
Inspect connectors and wiring at BCM, immobilizer module, instrument cluster, and any aftermarket security devices for damage, corrosion, or moisture.
Look for recent service history: module replacements, software updates, or installation of aftermarket alarms/remote starters.
Check for Technical Service Bulletins (TSBs) or software updates related to U2510 or security/BCM modules.
Using an oscilloscope or high-speed CAN capable scan tool, monitor CAN_H and CAN_L for proper idle voltages (~2.5 V differential behavior) and absence of excessive error frames.

Signal parameters

CAN bus voltage rails (VBAT, ground).
CAN_H and CAN_L idle voltages and differential amplitude.
CAN message ID(s) related to vehicle security/immobilizer (manufacturer-specific).
Message frequency (Hz) and expected periodicity for security messages.
Payload length and expected value ranges for security-related signals (lock state, immobilizer status, transponder ID presence).
Checksum or authentication flag fields if used by manufacturer.

Diagnostic algorithm

Connect a qualified diagnostic tool and capture all stored and pending U-codes and freeze frame data; note time-stamps and ignition state.
Disable/record and remove any aftermarket security or remote-start equipment; clear codes and attempt to reproduce fault. If code does not return, isolate aftermarket device as probable cause.
Verify battery voltage (12.4–12.9 V rest, >13.5 V with engine running). Recharge or replace battery if low and repeat tests. Low voltage can corrupt module communication.
Visually inspect and secure ground straps and battery negative connection. Poor ground can produce communication anomalies.
Inspect wiring and connectors at modules involved in vehicle security (BCM, immobilizer unit, instrument cluster). Repair any damaged pins, corroded connectors, or frayed harness sections. Reseat connectors.
With ignition ON, monitor CAN_H/CAN_L with scope or high-speed CAN tool. Look for asymmetric voltages, stuck dominant bits, bus contention, or frequent error frames. If observed, isolate by disconnecting segments/modules one at a time to find the failing node.
Measure CAN termination resistance between CAN_H and CAN_L at the diagnostic connector or harness; expect ≈60 ohms total. Check for opens (very high resistance) or shorts to VBAT/ground. Repair as required.
If a specific module is suspected, verify part number and software calibration level against manufacturer data. Reflash/update module software per latest service information or perform a module reprogramming/restore if available. Ensure correct coding/vehicle configuration after replacement.
If immobilizer/key authentication is suspected, verify key transponder IDs, attempt key re-learn procedure per manufacturer, or test with known-good keys. Follow secure procedures for key programming.
After repairs or isolation, clear codes and perform a full drive cycle or specified re-check procedure. Confirm U2510 does not return and that all security functions operate normally. If intermittent, monitor for extended period or use data logging.
If unable to isolate fault, consult manufacturer technical documentation, wiring diagrams, and support; consider module bench testing or replacement only after confirming wiring and power/ground integrity.

Likely causes

Damaged wiring or pin corrosion at BCM/immobilizer connectors leading to corrupted CAN frames.
Faulty immobilizer or vehicle security control module producing invalid message content.
Aftermarket security device transmitting incorrect/unauthenticated CAN messages.
Battery voltage below specification during key learn or module wake-up causing incomplete authentication handshake.
Recent module replacement or software update not coded/programmed to vehicle.

Fault status

⚠️ Status

Module reports invalid or unauthenticated security-related CAN data — received message payload, format, or checksum/authentication does not match expected values. May result in disabled security functions or no-start conditions.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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U2510 — CAN - invalid data for vehicle security