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Mercedes Benz 204 Engine Control Units

Main Control Unit
Main Control Unit
Local Network
Local Network
Detail Network
Detail Network
Engine control ME 9.7 AMG
The gasoline injection and ignition system (engine control) is controlled by the engine control unit (ME-SFI [ME] control unit). ME-SFI [ME] control unit 9.7, version "Bosch ME 9.7 AMG", is used for the AMG 6.3-liter naturally aspirated V8 engine and the control unit is specially tuned for the properties of this high performance engine.
The software in ME-SFI [ME] control unit 9.7 is flashable, making the control unit flexible and allowing it to be kept up-to-date with technological developments.
System control
The following systems are controlled and coordinated by ME-SFI [ME] control unit 9.7:
• Ignition system
• Injection system
• Idle speed control
• Torque interface
• Alternator interface (LIN)
• Evaporative emission control system
• Thermal management
• Starter control
• Immobilizer and drive authorization system (DAS 3)
• Diagnosis and fault storage
• Emission control
Evaluated input signals
ME-SFI [ME] control unit 9.7 evaluates the following information for the engine control system:
• Air mass
• Coolant temperature
• Engine speed and crankshaft position
• Throttle valve position
• Accelerator pedal position
• Intake manifold pressure
• Intake air temperature
• Fuel pressure
• Fuel tank pressure (with code (494) USA version)
• Position of intake and exhaust camshafts
• Alternator interface
• Engine knocking
• Oil level
• Oil temperature
• O2 concentration upstream and downstream of firewall catalytic converter
Signals influencing engine control
Other input signals that ME-SFI [ME] control unit 9.7 receives from other control units via the CAN data bus (Controller Area Network) include:
• Vehicle speed
• Torque requests
• Gear range and gear recognition
• Cruise control or DISTRONIC commands
• Braking recognition
• Steering angle
• Start enable (drive authorization system)
• Crash signal
• Fuel level
Networking of control units for engine control
· A1 Instrument cluster
· N2/10 Supplemental restraint system control unit
· N3/10 ME-SFI [ME] control unit 9.7
· N10/1 Front SAM control unit with fuse and relay module
· N10/2 Rear SAM control unit with fuse and relay module
· N22/7 Automatic air conditioning control and operating unit
· N30/4 Electronic Stability Program control unit
· N73 Electronic ignition lock control unit
· N80 Steering column module control unit
· N118/3 Left fuel pump control unit
· N118/4 Right fuel pump control unit
· Y3/8 Fully integrated transmission control unit
· X11/4 Diagnostic connector
· CAN B Interior CAN
· CAN C Drivetrain CAN
· CAN D Diagnostic CAN
· CAN E Chassis CAN
· 1 Intake manifold
· 2 Fuel feed unit
· 2/2 Fuel filter with pressure limiting valve
· 3 Fuel tank
· 4 Fuel line to fuel distribution rail
· 5 Firewall catalytic converter
· A16/1 Right knock sensor
· A16/2 Left knock sensor
· B1 Oil temperature sensor
· B2/6 Left hot film mass air flow sensor
· B2/7 Right hot film mass air flow sensor
· B4/3 Fuel tank pressure sensor (with code (494) USA version)
· B4/15 Fuel pressure sensor
· B6/4 Left intake camshaft Hall sensor
· B6/5 Right intake camshaft Hall sensor
· B6/6 Right exhaust camshaft Hall sensor
· B6/7 Left exhaust camshaft Hall sensor
· B11/4 Coolant temperature sensor
· B17 Intake air temperature sensor
· B28 Pressure sensor
· B37 Accelerator pedal sensor
· B70 Crankshaft Hall sensor
· G2 Alternator
· G3/3 Left oxygen sensor upstream of catalytic converter
· G3/4 Right oxygen sensor upstream of catalytic converter
· G3/5 Left oxygen sensor downstream of catalytic converter
· G3/6 Right oxygen sensor downstream of catalytic converter
· K25 Oil cooler fan motor relay
· M1 Starter
· M3 Right fuel pump
· M3/2 Left fuel pump
· M4/1 Oil cooler fan motor
· M4/7 Combustion engine and air conditioning with integrated control fan motor
· M16/3 Front throttle valve actuator
· M16/4 Rear throttle valve actuator
· M33 Electric air pump
· N3/10 ME-SFI [ME] control unit 9.7
· N10/1kM Circuit 50 relay, starter
· N10/1kN Circuit 87 relay, engine
· N10/1kP Secondary air injection relay
· N118/3 Left fuel pump control unit
· N118/4 Right fuel pump control unit
· R48 Coolant thermostat heating element
· S43 Oil level check switch
· T1/1- T1/8 ignition coils, cylinders 1 to 8
· X11/4 Diagnostic connector
· Y16/2 Heating system shutoff valve
· Y22/6 Intake manifold switchover valve
· Y32 Air pump switchover valve
· Y49/4 Left intake camshaft solenoid
· Y49/5 Right intake camshaft solenoid
· Y49/6 Left exhaust camshaft solenoid
· Y49/7 Right exhaust camshaft solenoid
· Y58/1 Purge valve
· Y58/4 Activated charcoal filter shutoff valve (with code (494) USA version)
· Y62 Injection valves, cylinders 1 to 8
· CAN C Drivetrain CAN
· CAN D Diagnostic CAN
· LIN C1 Drivetrain LIN

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