Code
B2302
LAND ROVER
B — Body
Headrest feedback potentiometer - circuit failure
Views:
UK: 8
EN: 10
RU: 9
AI status
Completed
Completed
100%
Causes
- Broken or shorted wiring in the headrest sensor circuit
- Poor connection or corroded connector at the headrest/seat module
- Failed headrest potentiometer (sensor)
- Faulty seat control/seat module input circuit
- Water ingress or contamination of connector or sensor
- Intermittent mechanical damage from seat adjustment or headrest removal
Symptoms
- Stored B2302 fault code (may be current or intermittent)
- Active headrest function may not operate or may not move to commanded positions
- Seat memory or position-related features may not work correctly
- Dashboard message or seat-related warning may appear (vehicle dependent)
- Intermittent operation or unpredictable headrest movement
What to check
- Read and record freeze frame/live data with a diagnostic scan tool and confirm fault is B2302
- Visually inspect headrest and seat connectors for corrosion, water, or damage
- Check wiring harness between headrest and seat module for pinching, chafing, or broken insulation
- Perform wiggle test on connector and wiring while monitoring live sensor signal to reproduce the fault
- Measure supply and ground at the sensor connector with ignition ON (see signal params)
- Measure sensor output voltage or resistance while moving headrest through its travel and check for smooth change
Signal parameters
- Typical sensor wiring: 3 wires — reference voltage (Vref), ground, and signal (varies with position)
- Vref typically present at connector: ~5 V (ignition on); verify with meter
- Signal voltage should vary smoothly across headrest travel within ~0–5 V (specific range may be manufacturer-dependent)
- No open circuit on signal or reference; continuity between sensor ground and chassis ground should be good
- If the sensor is a variable resistor, resistance should change smoothly with position and show no open/short
Diagnostic algorithm
- Verify vehicle battery voltage is stable and ignition in the correct position (ON, as required)
- Read and record codes and live data from seat/comfort module, note whether code is current or historic
- Visually inspect headrest, seat, and connector for damage, contamination, or water ingress; repair or clean as needed
- Backprobe the headrest connector: confirm Vref (approx. 5 V), ground continuity, and that signal voltage changes smoothly while moving the headrest
- If Vref is missing, trace back to seat control module fuse, connector, or wiring and repair
- If Vref and ground are present but signal is open or stuck, measure sensor resistance (if accessible) or disconnect sensor and check for short to ground/voltage on signal circuit
- Perform wiggle test of harness and connectors while monitoring live data to locate intermittent breaks
- If wiring and connectors test good, replace the headrest potentiometer/sensor assembly and retest
- If problem remains after sensor replacement, check and test the seat control module input circuit; consult wiring diagrams and consider module replacement only after confirming sensor and wiring integrity
- Clear codes and confirm that fault does not return and that live signal behaves correctly during multiple headrest cycles
Likely causes
- Wiring chafe or pinched wire between seat base and headrest
- Corroded/loose pin in headrest connector
- Failed potentiometer inside headrest (wear or internal open)
- Ground or reference voltage missing at the sensor connector
Fault status
Status
B2302 — Headrest feedback potentiometer circuit failure. Signal out of range, open, or short detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
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Code
B2302
Other
B — Body
Seat Headrest Feedback Potentiometer Circuit Failure
Views:
UK: 21
EN: 25
RU: 20
AI status
Completed
Completed
100%
Causes
- Broken or shorted wiring in the headrest sensor circuit
- Poor connection or corroded connector at the headrest/seat module
- Failed headrest potentiometer (sensor)
- Faulty seat control/seat module input circuit
- Water ingress or contamination of connector or sensor
- Intermittent mechanical damage from seat adjustment or headrest removal
Symptoms
- Stored B2302 fault code (may be current or intermittent)
- Active headrest function may not operate or may not move to commanded positions
- Seat memory or position-related features may not work correctly
- Dashboard message or seat-related warning may appear (vehicle dependent)
- Intermittent operation or unpredictable headrest movement
What to check
- Read and record freeze frame/live data with a diagnostic scan tool and confirm fault is B2302
- Visually inspect headrest and seat connectors for corrosion, water, or damage
- Check wiring harness between headrest and seat module for pinching, chafing, or broken insulation
- Perform wiggle test on connector and wiring while monitoring live sensor signal to reproduce the fault
- Measure supply and ground at the sensor connector with ignition ON (see signal params)
- Measure sensor output voltage or resistance while moving headrest through its travel and check for smooth change
Signal parameters
- Typical sensor wiring: 3 wires — reference voltage (Vref), ground, and signal (varies with position)
- Vref typically present at connector: ~5 V (ignition on); verify with meter
- Signal voltage should vary smoothly across headrest travel within ~0–5 V (specific range may be manufacturer-dependent)
- No open circuit on signal or reference; continuity between sensor ground and chassis ground should be good
- If the sensor is a variable resistor, resistance should change smoothly with position and show no open/short
Diagnostic algorithm
- Verify vehicle battery voltage is stable and ignition in the correct position (ON, as required)
- Read and record codes and live data from seat/comfort module, note whether code is current or historic
- Visually inspect headrest, seat, and connector for damage, contamination, or water ingress; repair or clean as needed
- Backprobe the headrest connector: confirm Vref (approx. 5 V), ground continuity, and that signal voltage changes smoothly while moving the headrest
- If Vref is missing, trace back to seat control module fuse, connector, or wiring and repair
- If Vref and ground are present but signal is open or stuck, measure sensor resistance (if accessible) or disconnect sensor and check for short to ground/voltage on signal circuit
- Perform wiggle test of harness and connectors while monitoring live data to locate intermittent breaks
- If wiring and connectors test good, replace the headrest potentiometer/sensor assembly and retest
- If problem remains after sensor replacement, check and test the seat control module input circuit; consult wiring diagrams and consider module replacement only after confirming sensor and wiring integrity
- Clear codes and confirm that fault does not return and that live signal behaves correctly during multiple headrest cycles
Likely causes
- Wiring chafe or pinched wire between seat base and headrest
- Corroded/loose pin in headrest connector
- Failed potentiometer inside headrest (wear or internal open)
- Ground or reference voltage missing at the sensor connector
Fault status
Status
B2302 — Headrest feedback potentiometer circuit failure. Signal out of range, open, or short detected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Available brands with manuals
1
LAND ROVER 2
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualOfficial workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.
199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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Send to email