General networking
For vehicles as of model year 2016 there are two variants of the chassis CAN (CAN E).
Variant 1:
If the vehicle does not contain equipment codes named in variant 2 there is just one chassis CAN present like before.
Version 2:
If the vehicle contains one of the following equipment codes, one chassis CAN 1 (CAN E1) and one chassis CAN 2 (CAN E2) are present:
Code 218 (Reversing camera)
Code 234 (Blind Spot Assist)
Code 459 (Steel suspension with adjustable damping)
Code 475 (Tire pressure monitor)
Code 476 (Lane Keeping Assist)
Code 513 (Traffic Sign Assist)
Code 614 (Bi-xenon headlamps)
CODE 615 (Bi-xenon headlamp with active curve lights)
CODE 618 (Bi-xenon headlamp)
Code 621 (Intelligent Light System (left-hand traffic))
code 622 (Intelligent Light System)
Code 631 (Static LED headlamps for left-hand traffic system)
Code 632 (Static LED headlamps for right-hand traffic system)
Code P44 (Parking Package)
The following text differentiates between variant 1 and variant 2. Vehicles up to model year 2016 are to be assigned to variant 1.
Engine front view |
1 | Air cleaner housing |
N3/10 | ME-SFI [ME] control unit |
P07.70-2250-76
Location
The ME-SFI [ME] control unit is located upstream of the left air filter on the air filter housing (1).
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 the interface (gateway) between the connected CAN bus systems.
Controlling the engine basic functions
Exhaust treatment
Exhaust gas recirculation (with code 920 (Gasoline direct injection with stratified charge))
Diagnosis and fault storage
Electronic accelerator
Drive authorization system and immobilizer
Alternator interface
Regulated camshaft adjustment
Valve lift switchover (with code A14 (CAMTRONIC))
high pressure gasoline injection
Fuel supply
Charge pressure control
Torque interface
Engine management Start-Stop function
Heat 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 or chassis CAN 1 and chassis CAN 2
Drive train sensor CAN (CAN I) (with code 920 (Gasoline direct injection with stratified charge))
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 or chassis CAN 1 and chassis CAN 2
Drive train sensor CAN (with code 920 (Gasoline direct injection with stratified charge))
The input and output factors for the following component parts are read in or output via direct lines by the ME-SFI [ME] control unit and processed by the engine management:
Input factors over a direct line from | Output factors over a direct line to | Supplemental information |
Terminal 15 | - | - |
Circuit 30 (fused) | - | - |
Circuit 31 | - | - |
Circuit 87M4 | - | - |
Knock sensor 1 (A16/1) | - | - |
Knock sensor 2 (A16/2) | - | - |
Hot film mass air flow sensor (B2/5) | - | With code 920 (Gasoline direct injection with stratified charge) |
Fuel tank pressure sensor (B4/3) | - | With CODE 460 (Canada version) or CODE 494 (USA version) |
Fuel pressure and temperature sensor (B4/25) | - | - |
Exhaust gas recirculation pressure sensor 1 (B5/5) | - | With code 920 (Gasoline direct injection with stratified charge) |
Exhaust gas recirculation pressure sensor 2 (B5/6) | - | With code 920 (Gasoline direct injection with stratified charge) |
Intake camshaft Hall sensor (B6/15) | - | - |
Exhaust camshaft Hall sensor (B6/16) | - | - |
Coolant temperature sensor (B11/4) | - | - |
Temperature sensor upstream of NOx storage catalytic converter (B16) | - | With code 920 (Gasoline direct injection with stratified charge) |
Charge air temperature sensor upstream of throttle valve (B17/7) | - | - |
Charge air temperature sensor downstream of throttle valve (B17/9) | - | - |
Pressure sensor downstream of air filter (B28/5) | - | - |
Pressure sensor upstream of throttle valve (B28/6) | - | - |
Pressure sensor downstream of throttle valve (B28/7) | - | - |
Accelerator pedal sensor (B37) | - | - |
Crankshaft Hall sensor (B70) (with rotational direction recognition) | - | - |
Gasoline particulate filter differential pressure sensor (B163/3) | - | Model 117, 156, 246 with code 598 (Gasoline particulate filter (OPF) with sensor system) |
Temperature sensor upstream of gasoline particulate filter (B163/4) | - | Model 117, 156, 246 with code 598 (Gasoline particulate filter (OPF) with sensor system) |
Manual transmission main shifter shaft position sensor (B79/3) | - | with manual transmission |
On-board electrical system battery (G1) | - | - |
Oxygen sensor sensor element downstream of catalytic converter (G3/1b1) | - | - |
- | Oxygen sensor heater downstream of catalytic converter (G3/1r1) | - |
Oxygen sensor sensor element upstream of catalytic converter (G3/2b1) | - | - |
- | Oxygen sensor heater upstream of catalytic converter (G3/2r1) | - |
Circuit 15 relay (F58kR) | - | - |
- | Starter circuit 50 relay (F58kM) | - |
Circuit relay87M (F58kN) | Circuit relay87M (F58kN) | - |
- | Transmission cooling coolant circulation pump relay (F58kO) | With code 429 (Dual-clutch transmission) |
Fan motor (M4/7) | Fan motor (M4/7) | - |
- | Actuator motor (M16/6m1), throttle valve | - |
Actual value potentiometer 1 (M16/6r1), throttle valve | - | - |
Actual value potentiometer 2 (M16/6r2), throttle valve | - | - |
Supplemental Restraint System control unit (N2/10) | - | - |
SAM control unit (N10) | - | - |
- | Fuel system control unit (N118) | - |
- | Wide open throttle operation vent line heater element (R39/2) | - |
- | Coolant thermostat heating element(R48) | - |
Clutch pedal switch (S40/3) | - | with manual transmission |
Start enable clutch pedal switch (S40/5) | - | with manual transmission |
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) | - |
Exhaust gas recirculation valve Hall sensor (Y27/1b1) | - | With code 920 (Gasoline direct injection with stratified charge) |
- | Exhaust gas recirculation valve rotating solenoid (Y27/1y1) | With code 920 (Gasoline direct injection with stratified charge) |
- | Intake camshaft solenoid (Y49/1) | - |
- | Exhaust camshaft solenoid (Y49/2) | - |
Intake camshaft valve lift changeover Hall sensor (Y49/8b1) | - | with code A14 (Camtronic) |
- | Intake camshaft valve lift changeover actuator (Y49/8) | with code A14 (Camtronic) |
- | Purging switchover valve (Y58/1) | - |
- | Partial load operation crankcase ventilation system valve (Y58/2) | - |
- | Activated charcoal canister shutoff valve (Y58/4) | With CODE 460 (Canada version) or 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) | - |
- | Boost pressure control pressure transducer (Y77/1) | - |
- | Radiator shutters actuator (Y84) | - |
- | Quantity control valve (Y94) | - |
- | Deceleration air switchover valve (Y101) | - |
- | Engine oil pump valve (Y130) | - |
- | Coolant pump switchover valve (Y133) | - |
The input and output factors for the following component parts and control units are transmitted or received by the ME-SFI [ME] control unit via LIN or CAN and processed by the engine management:
Input factors via the drive LIN (LIN C1) from | Output factors via the drive LIN (LIN C1) to | Supplemental information |
Alternator (G2) | Alternator (G2) | - |
Input factors via drive CAN (CAN C) from | Output factors via drive CAN (CAN C) to | Supplemental information |
Dual-clutch transmission fully integrated transmission control unit (Y3/14n4) | Dual-clutch transmission fully integrated transmission control unit (Y3/14n4) | with transmission 724 |
Fuel system control unit (N118) | Fuel system control unit (N118) | - |
Input factors via suspension CAN (CAN E) (variant 1) or via suspension CAN 1 (CAN E1) (variant 2) from | Output factors via suspension CAN (CAN E) (variant 1) or via suspension CAN 1 (CAN E1) (variant 2) to | Supplemental information |
Instrument cluster (A1) | Instrument cluster (A1) | via chassis CAN 2 (CAN E2) and electronic ignition lock control unit (N73) |
DISTRONIC electric controller unit (A89) (with code (239) DISTRONIC PLUS)) | - | - |
Supplemental Restraint System control unit (N2/10) | - | - |
SAM control unit (N10) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
AAC control and operating unit (N22/7) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
Electronic Stability Program control unit (N30/4) | - | - |
Left front door control unit (N69/1) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
Upper control panel control unit (N72/1) | - | Via battery sensor LIN (LIN B15), SAM control unit (N10), interior CAN (CAN B) and electronic ignition lock control unit (N73) |
Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
Steering column tube module control unit (N80) | - | - |
Diagnostics connection (X11/4) | - | Via diagnostic CAN (CAN D) and electronic ignition lock control unit (N73) |
Input factors via drive train sensor CAN (CAN I) from | Output factors via drive train sensor CAN (CAN I) to | Supplemental information |
NOx sensor control unit (N37/4) | NOx sensor control unit (N37/4) | With code 920 (Gasoline direct injection with stratified charge) |
Structure
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.
Voltage supply
The ME-SFI [ME] control unit is supplied with a power 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.
Variants
The engine management variants, suchas country and exhaust variants, are activated via variant coding.
Exchange of the ME-SFI [ME] control unit is not necessary.