Code
B2612
LAND ROVER
B — Body
Driver seat position sensor circuit fault
Views:
UK: 9
EN: 16
RU: 8
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in the seat position sensor circuit
- Poor connector contact, corrosion or water ingress at seat connectors
- Faulty seat position sensor (potentiometer or angle sensor)
- Faulty seat control module or Body Control Module (BCM) input circuit
- Poor ground or blown fuse related to seat electronics
- Mechanical damage from seat movement or aftermarket seat installation
Symptoms
- Airbag or SRS warning lamp illuminated (possible occupant classification faults)
- Seat memory/preset functions not working or not storing position
- Seat position readout incorrect or not available on diagnostic tool
- Intermittent faults that occur when seat is moved
- Related steering/entry assist presets may not operate
What to check
- Read stored DTCs and freeze-frame data with a capable scan tool; note any related codes (airbag, BCM, seat module).
- Perform a visual inspection of connectors and wiring under the driver seat for damage, corrosion, loose pins or water.
- Wiggle test: monitor live sensor data or DTCs while moving the seat to reproduce the fault.
- Verify fuses and battery voltage; check for good ground at seat harness ground point.
- Remove connector and inspect pins for corrosion, bent pins or pushed-out terminals.
- Measure continuity between the seat sensor connector and the module connector to check for opens/shorts.
Signal parameters
- Reference supply typically a 5 V reference or vehicle logic voltage — should be present at sensor supply pin with ignition on.
- Signal voltage changes with seat position; expected behavior: signal varies smoothly across range (commonly ~0.5–4.5 V) as seat moves.
- Sensor element often behaves as a variable resistor — resistance changes with position (hundreds of ohms to kilo-ohms, model dependent).
- Low resistance to ground or short to battery voltage indicates a wiring fault.
- Intermittent or no signal indicates open circuit or failed sensor.
Diagnostic algorithm
- Connect diagnostic scanner, record B2612 and any related codes; clear codes and perform a road/seat-move test to see if code returns.
- Inspect under-seat area: connectors, clips, wiring harness along seat rails for rubbing, cuts, or corrosion. Repair any visible damage.
- With ignition on, backprobe the sensor connector: confirm reference voltage, ground continuity and that the sensor signal changes while moving the seat.
- If no reference or ground, trace and repair supply/ground circuit to the module (check fuses, relays, module power pins).
- If reference and ground are good but signal is open/erratic, measure sensor resistance and compare to service data; if out of range, replace the seat position sensor.
- If wiring and sensor check good, perform continuity/resistance checks between seat connector and seat module/BCM connector to locate intermittent open/shorts.
- Inspect for TSBs or software updates; if sensor replaced or module replaced, perform any required calibration or programming per manufacturer procedure.
- After repairs, clear DTCs and verify repair by cycling ignition and moving seat through full travel; re-scan to ensure code does not return.
Likely causes
- Corroded/loose connector under the seat
- Broken/chafed wiring in the harness near seat rails
- Failed seat position sensor assembly
- Intermittent connection caused by seat movement
- Faulty seat module or lost reference/ground
Fault status
Status
Driver seat position sensor circuit fault — signal out of range, open circuit, or short to power/ground detected.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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