B10AD

Code

Generic B — Body

BCM Memory Corruption

Brand: Generic

Type: B — Body

Views: UK: 4 EN: 7 RU: 9

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Page language: EN

Persistent BCM-related warning lights or instrument cluster messages
Intermittent or permanent loss of convenience functions (doors, lights, wipers, remote locking)
Erratic operation of lights, wipers, or central locking
Multiple CAN/LIN bus communication DTCs present
Vehicle modules fail to retain learned settings after key cycles or battery disconnect

Read all stored DTCs and freeze frame / event data from the BCM and linked modules
Record vehicle voltage history and measure battery resting voltage (should be >12.4 V)
Inspect BCM connectors for corrosion, bent pins, broken locking tangs, or water contamination
Check all power and ground circuits to the BCM for proper voltage and continuity
Scan the vehicle for CAN/LIN bus error counters and other module communication faults
Confirm whether a recent software update or module replacement occurred and obtain service history

Safely secure vehicle, chock wheels, and disconnect test equipment per shop procedures
Connect a manufacturer-level scan tool and read all BCM and network DTCs; save logs and freeze-frame data
Measure and record battery voltage and check charging system health; recharge or replace battery if below spec
Visually inspect BCM and harness for water intrusion, corrosion, rodent damage, or heat damage; repair harness/connectors as needed
Verify all BCM power and ground circuits for proper voltage and solid grounds; repair any wiring faults
Check other modules for related communication errors; isolate bus by disconnecting nodes to identify which device creates bus errors
If an interrupted reflash is suspected, attempt a soft reboot/restart of the BCM (follow manufacturer procedure) and clear codes; if codes return, proceed
Run BCM built-in self-tests and memory tests if the tool supports it and note any explicit memory/EEPROM errors
If memory corruption is confirmed and no wiring/power issue is found, obtain correct OEM software and reflash/reprogram the BCM per factory procedure (ensure stable battery and power supply during reflash)
If reflash fails or memory errors persist, replace the BCM with a known-good or new unit and program/configure to the vehicle per manufacturer instructions
After repair or reflash, clear codes, cycle ignition and test all affected functions and monitor for reoccurrence over multiple key cycles

Recent battery replacement or jump start during reflash
Vehicle recently had BCM reprogramming/update that failed or was interrupted
Visible corrosion or water staining on BCM connector or housing
Multiple related body network modules showing communication errors
Battery voltage below 11.5 V or repeated vehicle cranking events recorded around the time the code set