U0247

Code

LAND ROVER U — Network/User

Lost communication with the seat control module F

Brand: LAND ROVER

Type: U — Network/User

Views: UK: 12 EN: 14 RU: 14

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty Seat Control Module F
Open/shorted or corroded wiring/connectors to the module
Loss of module power or ground (battery feed, fused circuits)
Faults or damage to the vehicle data bus (CAN/LIN) such as missing termination, shorts, or excessive impedance
Intermittent connection caused by water ingress, chafing or broken wires
Software or calibration fault in the module or master gateways

Symptoms

Seat functions not working or intermittent (seat adjust, memory, heating/cooling if integrated)
Related seats may show error messages in instrument cluster or infotainment
One or more comfort features inoperative or default to safe mode
Stored U0247 and possibly other U-codes in multiple modules
Intermittent operation correlated with vehicle motion or door/seating movement

What to check

Read all stored and pending DTCs from all modules with a capable diagnostic scan tool
Check for additional related U-codes or B/C-codes that indicate bus/gateway issues
Visually inspect seat control module connector(s) for corrosion, bent pins, moisture, or damage
Check relevant fuses and relays for the seat module power circuits
Verify battery voltage at the module power pin with ignition on and engine off/on as required
Verify ground integrity at module ground pins (voltage drop test)

Signal parameters

Bus type: likely CAN (high-speed) or LIN for seat functions — confirm from wiring diagram
Idle CAN voltage: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (difference ≈ 0 V idle; differential ~0 V), active swing ±2V from idle
Termination: two 120 ohm resistors in parallel (≈60 Ω) across CAN_H and CAN_L at ends of bus
Messages: module will transmit periodic status messages; absence of expected periodic frames indicates loss of communication
Diagnostic response: module should respond to UDS/ISO-TP requests if present

Diagnostic algorithm

Record freeze-frame, module list, and all stored U-codes from all modules. Note any other U-codes or battery/voltage-related codes.
Visually inspect the seat control module connector(s) and harness for corrosion, damage, moisture, or pin issues. Repair or replace as needed.
Verify power and ground at the module: check fuses, supply voltage at the module power pin(s) with key ON, and perform voltage-drop tests on grounds.
With a scope or multimeter, measure CAN_H and CAN_L at the module connector: confirm idle voltages, differential signals while bus active, and correct termination resistance (~60 Ω).
Attempt to communicate with the seat control module using a factory-level scan tool. If no response, test communication at the next known node/gateway to isolate whether the fault is local or network-wide.
Perform continuity and resistance checks along the wiring between the module and gateway/BCM; look for opens, short-to-ground, and short-to-Vbatt.
If intermittent, perform wiggle tests on harness and seat movements while monitoring live data and DTC set/clear behavior.
Inspect for aftermarket equipment or previous repairs that may have altered the bus topology or introduced wiring faults.
If wiring, power and grounds are confirmed good and the module does not respond to diagnostics, consider module reprogramming (if known software issue) or replacement following manufacturer procedure.
After repair, clear DTCs, verify communication restoration, and perform function checks of seat features and monitor for reappearance of the code.

Likely causes

Blown fuse or disconnected power/ground to Seat Control Module F
Corroded or loose connector at the seat control module or junction connector
Damaged CAN/LIN wiring between module and gateway (open/short to ground or Vbatt)
Faulty module (internal electronics) after wiring and power verified
Gateway or BCM not forwarding messages due to software fault

Fault status

⚠️ Status

Lost communication with Seat Control Module F. Module not responding on network or messages not received by system. May be intermittent or permanent until wiring, power, ground, or module issue is resolved.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

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U0247 — Lost communication with the seat control module F