B14A2

Code

Generic B — Body

Body Control Module Internal Memory Error

Brand: Generic

Type: B — Body

Views: UK: 7 EN: 10 RU: 6

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Page language: EN

One or more body systems inoperative or intermittent (door locks, windows, lighting, wipers, interior lights)
Instrument cluster or other modules report communication errors or lose connection with BCM
Illumination of warning lamps related to body systems
Stored or pending DTCs related to BCM memory, internal checksum, or read/write failures
Unexplained erratic behavior of body electronics

Use OEM-capable scan tool to read all stored and pending DTCs and freeze frame data
Check battery state-of-charge and charging system voltage (should be stable ~12.6–14.5 V)
Inspect BCM power and ground circuits and fuses for continuity and proper connections
Visually inspect BCM connector and PCB for corrosion, water ingress, burnt components, or physical damage
Check vehicle service bulletin/recall database and module programming history
Scan CAN/LIN bus for related communication faults and verify network wiring

Record all DTCs and freeze frame data with a qualified scan tool; note related modules reporting errors.
Verify battery voltage and health. Recharge or connect stable DC power if low before further testing; retest after stable power restored.
Inspect BCM connectors and wiring: check for loose pins, corrosion, bent terminals, or water intrusion; repair as needed.
Verify fuses and relays feeding BCM; check for intermittent power using a DVOM or oscilloscope.
Check grounds: measure resistance between BCM ground and chassis/negative battery; repair high-resistance grounds.
If external power/ground and wiring are good, attempt a soft reset: follow OEM procedure (battery disconnect per service manual or use scan tool module reset). Re-scan for codes.
If soft reset does not clear the fault, check for available OEM reprogramming/firmware updates and TSBs. Reflash or perform module reprogramming using manufacturer tools following battery support procedures.
If reprogramming fails or memory errors persist, consider module replacement. Before replacement, ensure replacement module is properly coded/configured to the vehicle and immobilizer/security systems if applicable.
After repair or reprogramming, clear codes and verify operation of affected systems and that DTCs do not return. Monitor for intermittent faults during road test/use.
If recurring failures occur, investigate root cause (e.g., parasitic draw, voltage spikes, water intrusion) to prevent repeat BCM failures.