Energy management, function - GF54.10-P-0003CE

MODEL 204.0/2 as of model year 2009 

/YoM 08 

MODEL 204.3 

MODEL 204.9 

Function requirements, general 

• Circuit 30 ON

Energy management, general 

Energy management manages the provision (supply) and consumption (management) of electrical energy with the aim of ensuring the startability of the engine and a stable supply to all electrical consumers.

The following components are involved in energy management:

• Battery sensor

  (monitoring of on-board electrical system battery charge level (G1))

• On-board electrical system battery

  (power storage and supply when the engine is off)

• Additional battery (G1/7)

  (with code (B03) ECO start/stop function)

  (On-board electrical system voltage supply with automatic engine start)

• Alternator (energy generation)
• CDI control unit or ME-SFI control unit

  (generator management)

• Front SAM control unit

  (actuation of on-board power supply management support (with code (B03) ECO start/stop function)

• Rear SAM control unit (On board power supply management, master control unit for energy management)

Energy management consists of the following subsystems:

• On-board electrical system management 
• Major assemblies coordinator 

On-board electrical system management 

The on-board electrical system management monitors on-board power supply utilization and actively intervenes in the energy management (e.g. consumer shutoff). The aim is to ensure the starting ability of the engine and a stable power supply to all electrical consumers.

Major assemblies coordinator 

The major assembly coordinator is integrated into the CDI control unit or the ME-SFI [ME] control unit and forms the interface between the on-board electrical system management and the alternator. The CDI control unit or the ME-SFI [ME] control unit communicates with the alternator over the drivetrain LIN. The major assembly coordinator regulates the alternator's power output to match the on-board electrical system management specifications taking engine load into consideration.

The recording and evaluation of the relevant variables for this are conducted by the following components:

• Rear SAM control unit
• CDI control unit or ME-SFI [ME] control unit
• Generator

Energy management is made up of the following subfunctions which are described in separate documents:

• Engine on energy management, function 
• Engine off energy management, function 
• Energy management for engine start/stop function (with code (B03) ECO start/stop function) 
• DC/AC converter function 

(with model 204.0/9 with code (U80) 115 V power outlet in cargo area and code (460) Canada version or code (494) USA version) 

The "energy management for engine start/stop function" subfunction is viewed from an energy management point-of-view. Information on the "engine timing Start-Stop function" subfunction is documented in the "Common-Rail Diesel Injection (CDI) function" description (with diesel engine) or "gasoline injection and ignition system with direct-injection function" (with gasoline engine).

	Engine on energy management, function		GF54.10-P-1060CE
	Engine off energy management, function		GF54.10-P-1050CE
	Energy management for engine start/stop function	With code (B03) ECO Start-stop function	GF54.10-P-1040CE
	DC/AC converter function	With model 204. 0/9 with code (U80) 115 V power outlet in cargo area and code (460) Canada version or code (494) USA version,	GF54.10-P-2005GD