B2320

Code

LAND ROVER B — Body

Horizontal feedback potentiometer of the driver mirror - failure of circuit

Brand: LAND ROVER

Type: B — Body

Views: UK: 21 EN: 42 RU: 16

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or short in the mirror harness (driver side)
Corroded or loose connector at mirror or door module
Failed horizontal feedback potentiometer inside the mirror assembly
Water ingress or damage to mirror electrical components
Faulty ground or reference supply from BCM
Intermittent wiring due to chafing or pin damage

Symptoms

Driver mirror will not adjust horizontally or adjusts erratically
Mirror position memory does not store or recall correctly
Mirror may not auto-fold/unfold or stops mid-travel
Intermittent mirror movement or incorrect mirror position reported
Possible stored mirror-related fault codes or warning message in infotainment/BCM

What to check

Read fault memory with a manufacturer-level scan tool; record freeze frame and related mirror codes
Visually inspect driver mirror connector and door wiring for corrosion, damage, or water ingress
Wiggle-test harness and connector while observing live data for the horizontal feedback signal
Back-probe the mirror connector while operating mirror to confirm presence of reference voltage, ground and varying signal
Measure continuity and resistance of wiring between mirror connector and BCM
Inspect and test ground connections at door hinge and body ground points

Signal parameters

Reference (VREF) typically from BCM ~5 V (check manufacturer spec)
Signal voltage varies with horizontal position, usually ~0.5–4.5 V as mirror moves
Potentiometer resistance varies smoothly across travel (manufacturer-specific, often 5 kΩ–20 kΩ range)
No signal or stuck/fixed voltage indicates open/short or failed pot
Intermittent or noisy signal suggests corrosion, dirty pot, or broken wiring

Diagnostic algorithm

Connect a Land Rover-capable scan tool; confirm B2320 and note any related mirror/seat memory codes.
Inspect driver mirror external connector and door harness for corrosion, damage, or evidence of water ingress; repair as required.
With connector attached, back-probe reference, signal and ground pins. Verify VREF present and stable (≈5 V) and good ground.
Operate the horizontal mirror motor while watching live signal voltage; signal should vary smoothly across travel. If signal is absent or fixed, proceed.
If signal missing or erratic, disconnect mirror and test continuity between mirror connector pins and BCM connector; repair any open/shorts.
If wiring checks good, measure potentiometer resistance across its terminals while moving mirror (or measure signal with mirror assembled). If resistance or signal is non-linear or open, mirror assembly potentiometer has failed—replace mirror.
After repairs, clear codes, cycle ignition and exercise mirror through full travel and memory recall; verify code does not return and functions are restored.
If wiring and mirror check OK but code persists, investigate BCM input circuit or perform BCM programming/diagnostics per factory procedures.

Likely causes

Damaged wiring or connector to driver mirror (most common)
Failed horizontal potentiometer inside mirror assembly
Corrosion/water ingress at mirror connector or inside mirror
Poor ground or lost reference voltage from BCM

Fault status

⚠️ Status

Horizontal feedback potentiometer (driver mirror) — circuit failure (no/invalid position signal)

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

160

Browse 160 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email

B2320 — Horizontal feedback potentiometer of the driver mirror - failure of circuit