View of engine from the front |
N3/10 | ME-SFI [ME] control unit |
P07.70-2264-76
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
Exhaust treatment
Exhaust gas recirculation (with NOx catalytic converter) (for code 920 (Gasoline direct injection with stratified charge))
Diagnosis and fault storage
Injection control
Electronic accelerator
Drive authorization system and immobilizer
Alternator interface
Regulated camshaft adjustment
Fuel supply
Torque interface
Engine management Start-Stop function
Intake manifold switchover
Thermal management
Ignition system
Reading in of signals
Input factors are read in over the following connections:
Direct line
Drive-LIN (LIN C1)
Drive train CAN (CAN C)
Chassis CAN 1 (CAN E1)
Drive train sensor CAN (CAN I)
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
Drive train CAN
Chassis CAN 1
Drive train sensor CAN
The front SAM control unit with fuse and relay module (N10/1) is the central interface (Gateway) for exchange of function-relevant data for control units which are connected to the various Control Area Network (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) | – | – |
Hot film MAF sensor (B2/5) | – | For code 920 (Gasoline direct injection with stratified charge) |
Intake air temperature sensor (B2/5b1) | – | For code 920 (Gasoline direct injection with stratified charge) |
Fuel tank pressure sensor (B4/3) | – | With CODE 494 (USA version) |
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) | – | – |
Temperature sensor upstream of the right NOx storage catalytic converter (B16) | – | For code 920 (Gasoline direct injection with stratified charge) |
Temperature sensor upstream of left NOx storage catalytic converter (B16/1) | – | For code 920 (Gasoline direct injection with stratified charge) |
Intake air temperature sensor (B17) | – | For code 920 (Gasoline direct injection with stratified charge) |
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) | – |
– | Fan motor (M4/7) | – |
Actual value potentiometer 1 (M16/6r1), throttle valve | – | – |
Actual value potentiometer 2 (M16/6r2), throttle valve | – | – |
– | Actuator motor (M16/6m1), throttle valve | – |
Circuit 15 relay (N10/1kJ) | – | – |
Supplemental Restraint System control unit (N2/10) | – | – |
– | Starter circuit 50 relay (N10/1kJ) | – |
– | Circuit 87M relay (N10/1kN) | – |
– | 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) | – |
– | Activated charcoal canister shutoff valve (Y58/4) | With CODE 494 (USA version) |
– | 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) | – |
– | Radiator shutters actuator (Y84) | – |
Right exhaust gas recirculation Hall sensor (Y87/1b1) | – | For code 920 (Gasoline direct injection with stratified charge) |
– | Right exhaust gas recirculation actuator motor (Y87/1m1) | For code 920 (Gasoline direct injection with stratified charge) |
Left exhaust gas recirculation Hall sensor (Y87/2b1) | – | For code 920 (Gasoline direct injection with stratified charge) |
– | Left exhaust gas recirculation actuator motor (Y87/2m1) | For code 920 (Gasoline direct injection with stratified charge) |
– | Quantity control valve (Y94) | – |
– | Engine oil pump valve (Y130) | – |
Input and initial parameters from the following components and control units are sent or received by the ME-SFI [ME] control unit via the LIN or CAN and are needed by the engine management:
Input factors via the drive-LIN (LIN C1) | Initial parameters via the drive-LIN (LIN C1) | Supplemental information |
Alternator (G2) | – | – |
Input factors via chassis CAN 1 (CAN E1) | Initial parameters via chassis CAN 1 (CAN E1) | Supplemental information |
Instrument cluster (A1) | Instrument cluster (A1) | Via chassis CAN 2 (CAN E2) and front SAM control unit with fuse and relay module (N10/1) |
Supplemental Restraint System control unit (N2/10) | – | – |
Rear SAM control unit with fuse and relay module (N10/2) | – | Via interior CAN (CAN B) and front SAM control unit with fuse and relay module (N10/1) |
AAC control and operating unit (N22/7) | – | Via interior CAN (CAN B) and front SAM control unit with fuse and relay module (N10/1) |
Premium Electronic Stability Program control unit (N30/4) | – | – |
Active Body Control control unit (N51/2) (for code 487 (Active Body Control (ABC))) | – | – |
Radar sensors control unit (N62/1) as of model year 2017 (for code 23P (Driving Assistance package Plus)) | – | Via chassis-FlexRay (Flex E) and chassis gateway control unit (N93/7) (for code 23P (Driving assistance package)) |
Video and radar sensor system control unit (N62/2) up to model year 2017 (for code 233 (DISTRONIC PLUS)), for code 237 (Active Blind Spot Assist)), (for code 238 (Active Lane Keeping Assist)) | – | – |
Left front door control unit (N69/1) | – | Via interior CAN (CAN B) and front SAM control unit with fuse and relay module (N10/1) |
Lower control panel control unit (N72) | – | Via instrument panel LIN (LIN 1) and front SAM control unit with fuse and relay module (N10/1) |
Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | – |
Steering column tube module control unit (N80) | – | – |
Diagnostic connector (X11/4) | Diagnostic connector (X11/4) | Via diagnostic CAN (CAN D) and front SAM control unit with fuse and relay module (N10/1) |
Input factors via drive train sensor CAN (CAN I) | Initial parameters via drive train sensor CAN (CAN I) | Supplemental information |
Left NOx sensor control unit (N37/1) | Left NOx sensor control unit (N37/1) | For code 920 (Gasoline direct injection with stratified charge) |
Right NOx sensor control unit (N37/2) | Right NOx sensor control unit (N37/2) | For code 920 (Gasoline direct injection with stratified charge) |
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.
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 operating 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.
Ground connection
The "circuit 31" ground connection is made via multiple ground lines to the right front longitudinal member ground point 2 (W52/2).
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.