B2324

Code

Other B — Body

Mirror Driver Vertical Feedback Potentiometer Circuit Failure

Brand: Other

Type: B — Body

Views: UK: 26 EN: 90 RU: 32

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Page language: EN

Causes

Open or short in the mirror vertical potentiometer wiring (power, ground, signal).
Corroded or poorly seated connector at the mirror or body harness.
Water intrusion or physical damage inside the mirror assembly.
Failed potentiometer or mirror motor/driver assembly.
Intermittent contact due to broken wiring from door flexing.
Faulty body control module or software fault (less common).

Symptoms

Power mirror fails to adjust vertically or moves erratically.
Mirror does not hold/return to memory positions (if equipped).
One direction of vertical travel is nonfunctional or inconsistent.
Diagnostic trouble code B2324 stored and may illuminate related message.
Possible clicking or unusual noise from mirror when attempting to adjust.

What to check

Scan tool: confirm B2324, freeze frame and any related mirror or body codes.
Visual inspection of mirror housing, connector, and door harness for damage or corrosion.
Wiggle test: observe live data while moving harness/door to recreate intermittent faults.
Check fuses and common ground points for the mirror circuit.
Backprobe the mirror connector and measure signal, power and ground with mirror command applied.
If available, read live potentiometer feedback values from the body control module while commanding mirror movement.

Signal parameters

Signal type: analog potentiometer feedback to mirror control/body control module.
Typical feedback voltage: variable DC in range ~0.5–4.5 V as mirror travels (vehicle-specific).
Typical resistance: varies smoothly with position; many designs are 1–20 kΩ across travel (vehicle-specific).
Reference: stable 5 V or reference supply and a solid ground must be present at the mirror connector for correct feedback.

Diagnostic algorithm

Retrieve code and related mirror/body codes with a scan tool; note conditions when code set.
Perform a visual inspection of the mirror, gaskets and connector for corrosion, water ingress, or physical damage.
Verify fuses and check for good ground at mirror ground pin(s).
With ignition/accessory on, command mirror up/down while monitoring live data or backprobing the feedback signal. Expect a smooth changing voltage (or resistance).
If feedback is stuck high/low or intermittent, unplug the mirror connector and inspect pins for corrosion, bent pins, or broken wires. Repair or clean as needed; reseat securely.
If wiring and connector look OK, measure continuity between the mirror connector and the body control module connector. Repair any opens/shorts, paying attention to flex areas in the door harness.
If wiring and connector test good but signal is bad when the mirror is connected, remove the mirror and bench-test the potentiometer/motor assembly or replace the mirror assembly with a known-good unit for confirmation.
If replacement mirror cures the issue, clear codes and verify operation. If a new mirror does not fix it, suspect body control module or wiring in the vehicle harness and perform module-level diagnostics.
After repairs, clear the code and perform a road/operation test including repeated mirror adjustments and memory function checks to verify repair.

Likely causes

Corroded/loose connector or wiring break in the mirror harness (most common).
Failed potentiometer or mirror motor/driver within the mirror assembly.
Water ingress or physical damage to mirror internals.
Fault in body control module or connector pins (least common).

Fault status

⚠️ Status

Stored when the body/mirror control detects an invalid, open, shorted or out-of-range voltage/resistance from the vertical position feedback potentiometer circuit in the exterior mirror assembly. May be logged as intermittent or continuous depending on fault behavior.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours