| Description | Bunk Control Unit |
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| Condition | New |
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| Brand | Mack/Volvo® |
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| Part Number | 22382005, A Bunk Control Unit (BCU) — also known as a Sleeper Control Module or Living Environment Control Module (LECM) — is an electronic control system in heavy-duty trucks (like Volvo, Mack, or Freightliner) that manages the comfort features inside the sleeper/bunk area of the cab. |
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It allows drivers to control climate, lighting, and auxiliary power functions from the sleeper without needing to sit in the driver’s seat.
Main Functions of a Bunk Control Unit 22382005
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Climate Control
Adjusts heating, air conditioning, and fan speed for the sleeper area.
Works with the HVAC system to maintain the selected temperature even when the engine is off (in trucks with parking HVAC systems).
Lighting Control
Controls reading lights, dome lights, and night lights in the bunk area.
Power Management
Operates auxiliary power systems (APU) or battery-powered HVAC functions.
Can monitor battery voltage and automatically shut off certain systems to prevent battery drain.
Alarm & Convenience Features
Some units include alarm clock, sleeper lock, window controls, or radio control functions.
In modern trucks, it connects with the main cab’s CAN network for integrated communication.
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Where It’s Located 22382005
Usually mounted:
Near the bed area, often on the side wall or overhead console.
In Volvo trucks, it’s typically located near the bunk heater vent or under the lower bunk.
Signs of a Faulty Bunk Control Unit 22382005
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Sleeper fan, heater, or A/C not responding
Bunk lights or outlets not working
Display not lighting up or showing error messages
Inconsistent temperature control
Communication codes (e.g., CAN bus faults) logged in the truck’s diagnostic system
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Example (Volvo Part 22382005)
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Found in Volvo VNL, VNX, and VHD models
Controls bunk HVAC and auxiliary functions
Works with related modules such as:
Living Environment Control Module (LECM)
Cab Climate Control Module (CCM)
APU Controller (if equipped)
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