B2314

Code

Other B — Body

Mirror Passenger Horizontal Feedback Potentiometer Circuit Short to Battery

Brand: Other

Type: B — Body

Views: UK: 25 EN: 35 RU: 25

AI status

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Page language: EN

Causes

Damaged/chafed wiring harness contacting battery voltage (B+)
Corroded or water-intruded mirror connector
Loose or pushed-back terminal causing B+ to contact the signal pin
Failed mirror position potentiometer or internal short in mirror assembly
Faulty mirror switch or BCM (less common)

Symptoms

Passenger mirror will not correctly adjust left/right (horizontal)
Mirror may be stuck at one extreme or drift to one side
Possibly intermittent mirror operation or erratic movement
DTC B2314 stored in BCM; no check engine light but body control module fault memory entry
Heater and other mirror functions may still work if power is separate

What to check

Scan vehicle and record freeze frame/related mirror codes; clear code and attempt to re-create
Visually inspect passenger mirror connector and wiring from mirror to door for corrosion, pinch points at hinge, or damaged insulation
Check mirror connector pins for pushed-back or bent terminals
Verify related fuses and powered feeds to mirror
Backprobe signal and power pins at the mirror connector with ignition/accessory ON and actuating horizontal mirror switch

Signal parameters

Expected feedback signal: approximately 0–5 V (varies with mirror position) — typical values: ~0.5 V (full left) to ~4.5 V (full right) or similar depending on design
Short condition: battery voltage present on feedback line (~12 V) when it should not be
Potentiometer resistance (mirror assembly): typically 2–10 kΩ across end terminals; variable between end terminals and wiper while moving

Diagnostic algorithm

Retrieve and record scan tool data: confirm B2314 and any related codes (driver mirror, vertical feedback, short to ground).
Visual inspection: open door, inspect harness through hinge area, examine mirror connector for corrosion, bent/pushed terminals, or evidence of water ingress. Repair visible damage.
With ignition ON (accessory) and mirror switch operated horizontally, backprobe the mirror connector signal (feedback) wire at the mirror: measure voltage. If ~12 V present → confirms short to battery on that circuit.
If voltage is normal at the connector, move to harness: disconnect mirror connector and measure for 12 V on the feedback pin of the harness side. If 12 V is present at harness side with mirror disconnected, the short is in the wiring or upstream. If 12 V is only present at mirror side with harness disconnected, the short is inside the mirror assembly (replace mirror).
Check continuity between feedback wire and B+ with key off; a low resistance indicates a short. Also check continuity to chassis/ground to rule out cross-short.
Wiggle test: with connector backprobed, move the door through full open/close cycles and inspect for intermittent changes — look for chafing at the hinge area.
If harness/connector repaired or mirror replaced, clear codes and verify proper operation and that voltage on feedback line varies within expected 0–5 V range while moving mirror horizontally.
If wiring and mirror are good and fault persists, inspect mirror switch and BCM outputs/inputs and repair or replace module as per manufacturer procedures.