Code
B2243
HUMMER
B — Body
Memory Set Switch Failed
Views:
UK: 14
EN: 19
RU: 22
AI status
Completed
Completed
100%
Causes
- Failed or intermittent Memory Set switch (mechanical/electrical)
- Open, short, or high-resistance wiring in the switch circuit
- Poor/loose connector or corroded terminals at the switch or BCM
- Missing power or ground to the switch or BCM
- Faulty Body Control Module (BCM) or related module
- Software anomaly or calibration issue
Symptoms
- Memory set buttons do not respond or cannot store positions
- Driver memory recall fails or does not move components
- Instrument cluster or infotainment may show a related message
- Intermittent operation of memory functions
- DTC B2243 logged in vehicle diagnostic system
What to check
- Scan vehicle with a capable diagnostic tool; read freeze frame and related DTCs
- Check for other body or memory-related codes (e.g., seat, mirror, BCM codes)
- Verify fuse(s) and power feed to memory switch circuits
- Inspect switch and connector for corrosion, damage, or water intrusion
- Wiggle switch and wiring while monitoring for intermittent faults
- Verify proper chassis and module grounds
Signal parameters
- Memory Set switch is typically an input to the Body Control Module (BCM); operation is reported as a digital on/off input or CAN message
- Expected inactive/idle: circuit at supply potential (near battery voltage or module Vref) or logic high depending on design
- Expected active: switch closure changes input to logic low (near 0 V) or sends a CAN button-press event
- If CAN-based, no direct voltage change at BCM pin—verify CAN message payload when pressing switch
- Look for clean, stable voltages with key on; no excessive resistance or voltage drop in circuit
Diagnostic algorithm
- Connect a diagnostic scan tool. Record B2243 and any related DTCs, note freeze-frame data and stored events.
- Verify basic power and ground: check relevant fuses and backprobe switch connector for key-on voltage and ground reference.
- Visually inspect switch, housing, and connector for damage, water, or corrosion; repair or replace damaged connector/shell as needed.
- With connector disconnected, test switch continuity/resistance while actuating. Compare to expected (open/closed) behavior; replace switch if out of spec or intermittent.
- Backprobe the switch circuit with the connector connected. Operate the switch while monitoring voltage/signal at the switch and at the BCM input (if accessible). Confirm signal changes and no intermittent drops.
- If vehicle uses CAN for switch reporting, monitor CAN data for button press events while operating the switch. If no event is seen, trace wiring to BCM or test a known-good switch.
- Perform a wiggle test along the harness to identify intermittent breaks. Repair any broken wires, chaffing, or poor crimps; re-secure harness routing.
- If wiring and switch verify OK, consult service information for BCM input tests. If BCM input circuit is suspect, inspect module connectors and grounds; consider module replacement only after wiring and switch are confirmed good.
- Clear codes and retest operation. Verify the memory function works and B2243 does not return.
Likely causes
- Defective Memory Set switch
- Corroded/loose connector at the switch
- Broken or chafed wiring between switch and BCM
- Blown fuse or missing key-on power feed to circuit
- Intermittent ground at chassis or module
- BCM input circuit fault or module failure
Fault status
Status
Memory Set Switch input fault detected. The vehicle cannot reliably detect Memory Set switch operation.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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