B2316

Code

LAND ROVER B — Body

Vertical feedback potentiometer of the mirror passenger side exterior mirror high

Brand: LAND ROVER

Type: B — Body

Views: UK: 8 EN: 17 RU: 15

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Page language: EN

Causes

Open or shorted wiring to the mirror vertical potentiometer
Corroded or loose mirror connector or pins
Failed vertical feedback potentiometer inside the mirror module
Water ingress or mechanical damage to the mirror assembly
Faulty mirror control module or body control module (BCM)
Intermittent connection caused by broken wires at the hinge/bellows

Symptoms

Passenger mirror will not adjust up/down or moves erratically
Mirror position not retained or resets to an incorrect position
One-touch or memory position functions do not work for passenger mirror
DTC B2316 stored and may illuminate a message or warning on the vehicle
Intermittent operation or change in mirror behavior when door is moved

What to check

Read freeze frame and live data with an OEM-capable scan tool; confirm B2316 and check related mirror codes
Perform a visual inspection of the mirror housing, connector and door harness for damage, corrosion or water
Operate the mirror and watch live feedback values for the vertical potentiometer for movement and stability
Wiggle test the mirror wiring and connector while monitoring the live signal/voltage for intermittent changes
Check for related network/communication codes (U0xxx) that could affect mirror control

Signal parameters

Reference supply typically ~5 V (check OEM specification)
Potentiometer output should vary smoothly across approx. 0–5 V as mirror is moved
Resistance across potentiometer terminals should change smoothly (typical low kΩ range — check service data)
A constant high voltage (near supply) or open circuit indicates high/out-of-range condition
Connector pin voltages: supply, ground, and signal — confirm correct voltages with ignition on

Diagnostic algorithm

Clear the code. Re-test mirror operation to see if B2316 returns (confirms persistent vs intermittent).
With ignition on, use a scan tool to view live data for the passenger mirror vertical feedback value while moving the mirror; note if value is fixed high or shows jagged/stepped changes.
Inspect the exterior mirror housing, gaskets and wiring entry for water intrusion or visible damage. Repair as needed.
Disconnect the mirror connector at the door and inspect pins for corrosion, bent or pushed-back terminals. Clean and reseal if required.
Back-probe the connector at the vehicle side and measure: reference voltage (≈5 V), signal voltage while moving the mirror, and ground continuity to chassis. Compare to OEM specs.
If signal is open or always high at the vehicle connector, trace wiring back to BCM for continuity and shorts to supply. Repair any damaged wiring.
If vehicle-side wiring and voltages are good but signal at the mirror connector is bad, the mirror module (potentiometer/motor assembly) is likely faulty — consider replacing the mirror unit.
After repairs/replacement, clear codes and confirm proper bidirectional mirror movement, memory function and that the code does not return. If code persists with correct wiring, investigate BCM/mirror control module and network communications.

Likely causes

Corroded connector at the mirror causing high voltage/erratic signal
Broken or chafed wiring in the door harness near the mirror
Worn or failed potentiometer inside the mirror motor assembly
Mirror motor jam or mechanical restriction forcing abnormal sensor reading
Faulty BCM or communications error reporting an incorrect level

Fault status

⚠️ Status

Passenger exterior mirror vertical feedback potentiometer - high/out-of-range signal

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

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