View of engine from the front |
N3/10 | ME-SFI [ME] control unit |
P07.70-2305-76
Location
The ME-SFI [ME] control unit is located on the left on engine.
Tasks
The ME-SFI [ME] control unit fulfills the following tasks:
Controlling the engine basic functions
Reading in of signals
Evaluation of input factors
Output of signals and actuation of components
The ME-SFI [ME] control unit also acts as an interface (Gateway) between the attached CAN bus systems.
Controlling the engine basic functions
Ignition ON
Start
Ignition OFF
Fuel supply
Injection control
Ignition system
Synchronization of injection and firing order
Start, post-start phase and warm-up enrichment
Rpm control
Alternator interface
Lambda control
Smooth running control
Thermal management
Torque coordination
Deceleration fuel shutoff
Knock control
Camshaft adjustment
Intake manifold switchover
Engine limp-home mode
European On-Board Diagnosis
Engine management Start-Stop function
Exhaust treatment
Electronic accelerator
Purging
Reading in of signals
Input factors are read in over the following connections:
Direct line
Drive-LIN (LIN C1)
Engine CAN (CAN C)
Drive train CAN (CAN C1)
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.
Output of signals and actuation of components
Initial parameter are output over the following connections:
Direct line
Drive train LIN
Engine CAN
Drive train CAN
The electronic ignition lock control unit (N73) is the central interface (Gateway) for exchanging the function-relevant data of the control units that are connected to the various CAN bus systems.
Input factors and initial parameters for the following components are read in or output over direct lines by the ME-SFI [ME] control unit and are required by the engine management system:
Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
Terminal 15 | – | – |
Circuit 30 (fused) | – | – |
Circuit 31 | – | – |
Circuit 87M4 | – | – |
Knock sensor 1 (A16/1) | – | – |
Knock sensor 2 (A16/2) | – | – |
Fuel pressure and temperature sensor (B4/25) | – | – |
Left intake camshaft Hall sensor (B6/4) | – | – |
Right intake camshaft Hall sensor (B6/5) | – | – |
Left exhaust camshaft Hall sensor (B6/6) | – | – |
Right exhaust camshaft Hall sensor (B6/7) | – | – |
Coolant temperature sensor (B11/4) | – | – |
Intake air temperature sensor (B17) | – | |
Intake manifold intake air temperature sensor (B17/1) | – | – |
Pressure sensor downstream of throttle valve (B28/7) | – | – |
Accelerator pedal sensor (B37) | – | – |
Crankshaft Hall sensor (B70) | – | – |
On-board electrical system battery (G1) | – | – |
Left oxygen sensor sensor element upstream of CAT (G3/3b1) | – | – |
– | Left oxygen sensor heater upstream of CAT (G3/3r1) | – |
Right oxygen sensor sensor element upstream of CAT (G3/4b1) | – | – |
– | Right oxygen sensor heater upstream of CAT (G3/4r1) | – |
Left oxygen sensor sensor element downstream of CAT (G3/5b1) | – | – |
– | Left oxygen sensor heater downstream of CAT (G3/5r1) | – |
Right oxygen sensor sensor element downstream of CAT (G3/6b1) | – | – |
– | Right oxygen sensor heater downstream of CAT (G3/6r1) | – |
– | Actuator motor (M16/6m1), throttle valve | – |
Actual value potentiometer 1 (M16/6r1), throttle valve | – | – |
Actual value potentiometer 2 (M16/6r2), throttle valve | – | – |
Engine compartment circuit 15 relay (K40/8kG) | – | – |
Circuit 87M relay (K40/8kN) | Circuit 87M relay (K40/8kN) | – |
– | Starter circuit 50 relay (K40/8kH) | – |
Supplemental Restraint System control unit (N2/10) | – | – |
– | Fuel system control unit (N118) | – |
– | Coolant thermostat heating element(R48) | – |
Oil level check switch (S43) | – | – |
– | Cylinder 1 ignition coil (T1/1) | – |
– | Cylinder 2 ignition coil (T1/2) | – |
– | Cylinder 3 ignition coil (T1/3) | – |
– | Cylinder 4 ignition coil (T1/4) | – |
– | Cylinder 5 ignition coil (T1/5) | – |
– | Cylinder 6 ignition coil (T1/6) | – |
– | Left intake camshaft solenoid (Y49/4) | – |
– | Right intake camshaft solenoid (Y49/5) | – |
– | Left exhaust camshaft solenoid (Y49/6) | – |
– | Right exhaust camshaft solenoid (Y49/7) | – |
– | Purging switchover valve (Y58/1) | – |
– | Cylinder 1 fuel injector (Y76/1) | – |
– | Cylinder 2 fuel injector (Y76/2) | – |
– | Cylinder 3 fuel injector (Y76/3) | – |
– | Cylinder 4 fuel injector (Y76/4) | – |
– | Cylinder 5 fuel injector (Y76/5) | – |
– | Cylinder 6 fuel injector (Y76/6) | – |
– | Intake manifold resonance flap switchover valve (Y77/2) | – |
– | Intake manifold selector drum switchover valve (Y77/3) | – |
– | Quantity control valve (Y94) | – |
– | Left switchable engine mount (Y123) | – |
– | Right switchable engine mount (Y123/1) | – |
– | Engine oil pump valve (Y130) | – |
Input parameters and initial parameters for the following components and control units are transmitted or received by the ME-SFI [ME] or CDI control unit via the LIN or CAN and are needed by the engine management system:
Input factors via the drive-LIN (LIN C1) | Initial parameters via the drive-LIN (LIN C1) | Supplemental information |
Alternator (G2) | Alternator (G2) | – |
Input factors over engine CAN (CAN C) | Initial parameters via engine CAN (CAN C) | Supplemental information |
Instrument cluster (A1) | Instrument cluster (A1) | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Supplemental Restraint System control unit (N2/10) | – | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Front SAM control unit (N10/6) | – | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Electronic Stability Program control unit (N30/4) | – | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
Radar sensors control unit (N62/1) (for code P20 (Driving Assist package)) | – | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
Powertrain control unit (N127) | Powertrain control unit (N127) | – |
Diagnostic connector (X11/4) | Diagnostic connector (X11/4) | Via diagnostic CAN (CAN D), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Input factors over drive train CAN 1 (CAN C1) | Initial parameters via drive train CAN 1 (CAN C1) | Supplemental information |
Instrument cluster (A1) | Instrument cluster (A1) | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Climate control control unit (N22/1) | – | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Electronic Stability Program control unit (N30/4) | – | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
Radar sensors control unit (N62/1) (for code P20 (Driving Assist package)) | – | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
Fuel system control unit (N118) | Fuel system control unit (N118) | – |
Powertrain control unit (N127) | Powertrain control unit (N127) | – |
Fully integrated transmission control unit (Y3/8n4) | Fully integrated transmission control unit (Y3/8n4) | – |
Body
The ME-SFI [ME] control unit housing is made out of diecast aluminum and the cover is made out corrosion-protected sheet steel. The ME-SFI [ME] control unit is water and dust protected.
The inside contains the 32-bit measuring and control electronics for the engine management.
Ground connection
The "Circuit 31" ground connection is connected over multiple ground lines to the ME-SFI [ME]/CDI control unit ground point (W25).
Power supply
The ME-SFI [ME] control unit is supplied with a voltage from "circuit 30 secured" and also for ignition ON from "circuit 87 M4". In the control voltage range, it has both short-circuit protection and reversed polarity protection. Power is supplied through several engaged parallel pins connected in parallel to relieve the electrical connections.
Variants
The variants of the engine management, for exampled country and exhaust variants, are activated with XD over the variant coding.
Exchange of the ME-SFI [ME] control unit is not necessary.