B14D2

Code

Generic B — Body

Steering Column Control Module Internal Fault

Brand: Generic

Type: B — Body

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Page language: EN

Causes

Internal electronic component failure inside SCCM (CPU, memory, ASIC)
Corrupted or failed module software/firmware
Intermittent or low power supply (battery, fuse, ignition feed)
Poor ground or high resistance ground connection
CAN/LIN bus or communication errors affecting module operation
Water intrusion or corrosion at module or connector

Symptoms

Steering column functions (steering lock, steering wheel controls, stalks) partially or fully inoperative
Warning message or indicator related to steering, stability, or steering assist on dash
Related modules report communication errors or lose connection to SCCM
Intermittent or permanent loss of steering column features (automatic tilt, memory, etc.)
Stored B14D2 code present and reappears after clearing

What to check

Use a scan tool to read all stored DTCs and freeze frame data; note time and conditions
Check for related communication U-codes (CAN bus) and body module errors
Visually inspect SCCM and connectors for corrosion, water ingress, damage, or loose pins
Verify module power and ground with key on and cranking (measure battery voltage at module connector)
Check fuses, relays, and any ignition feed circuits supplying the SCCM
Inspect wiring harness for chafing, repairs, or recent collision damage near steering column

Signal parameters

Supply voltage (module Vbat) — expected nominal ~11–14.5 V with ignition on
Ground continuity — low resistance to chassis ground
CAN_H and CAN_L bus voltages — idle nominal around 2.5 V; differential behavior during traffic
Module wake/standby request signals (if applicable) — correct logic levels per wiring diagram
Steering angle/torque sensor data messages on CAN (present and valid)
Module current draw — compare to specification (abnormal high or zero draw may indicate fault)

Diagnostic algorithm

Connect a capable scan tool, record B14D2 with freeze frame and any accompanying codes. Check for related U‑codes (CAN communication faults).
Visually inspect the SCCM housing and connector for signs of moisture, corrosion, bent pins, or heat damage. Repair or replace connector as needed.
Verify power and ground at the SCCM connector: measure battery voltage on the power pin(s) and continuity from module ground to chassis. Repair wiring or grounds that are out of tolerance.
Check fuses and ignition feed circuits supplying the SCCM. Restore any blown fuses and determine root cause before replacing the fuse repeatedly.
Observe CAN bus activity with a scope or multimeter: confirm idle voltages and that the SCCM is transmitting/receiving messages. If bus is off or shorted, isolate and repair wiring or other faulty nodes.
If wiring, power, and bus are good but the code persists, attempt a module reset/clear and then power-cycle. If available, perform a software/firmware reflash or update per manufacturer procedure.
If reflash fails or the module reports internal error after software update, consider replacing the SCCM and perform necessary programming and calibration. After replacement, verify system operation and clear codes.
If replacement performed, re-run diagnostics and road-test as required to confirm no recurrence and normal communications.

Likely causes

Module internal hardware failure (most likely when no external faults found)
Software corruption needing reflash or calibration
Supply voltage outside normal range (weak battery, blown fuse, poor connector)
Ground or chassis return issue causing module reset/fault
Bus communication fault (CAN off-line or short) appearing as internal error
Connector contamination/corrosion causing intermittent contact

Fault status

⚠️ Status

Steering Column Control Module internal fault detected. Module reported an internal error or failed self-test. May require reprogramming or replacement after verifying power, grounds and communication bus integrity.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours