View of engine from the front top |
N3/10 | ME-SFI [ME] control unit |
P07.70-2615-76
Location
The ME-SFI [ME] control unit is placed on the top center of the internal combustion engine.
Task
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
Diagnosis and fault storage
Injection control
Electronic accelerator
Drive authorization system and immobilizer
Alternator interface
Regulated camshaft adjustment
Fuel supply
Torque interface
Automatic engine start/engine stop
Thermal management
Ignition system
Reading in of signals
Input factors are read in over the following connections:
Direct line
Drive train CAN (CAN C)
Engine 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 CAN
Engine 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 tank diagnostic module (A101) | Fuel tank diagnostic module (A101) | With CODE 494 (USA version) |
Purging pressure sensor (B4/4) | | With CODE 494 (USA version) |
Fuel pressure and temperature sensor (B4/25) | | |
Fuel tank pressure sensor 1 (B4/48) | | With CODE 494 (USA version) |
Fuel tank pressure sensor 2 (B4/49) | | With CODE 494 (USA version) |
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) | | |
Charge air temperature sensor (B17/8) | | |
Pressure sensor downstream of left cylinder bank air filter (B28/4) | | |
Pressure sensor downstream of right cylinder bank 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) | | |
| Starter circuit 50 relay (F58kM) | |
Circuit 87 M relay (F58kN) | Circuit 87 M relay (F58kN) | |
Circuit 15 relay (F58kR) | | |
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 | | |
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) | |
| Fuel tank shutoff valve (Y58/5) | With CODE 494 (USA version) |
| Fuel vapor shutoff valve (Y75/1) | 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) | |
| Boost pressure control pressure transducer (Y77/1) | |
| Quantity control valve (Y94) | |
| Left thrust circulating air switchover valve (Y101/1) | |
| Right thrust circulating air switchover valve (Y101/2) | |
| 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 CAN and are needed by the engine management:
Input factors via the drive train CAN (CAN C) | Initial parameter via the drive train CAN (CAN C) | Supplemental information |
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) | |
Input factors over engine CAN (CAN C1) | Initial parameters over engine CAN (CAN C1) | Supplemental information |
Instrument cluster (A1) | Instrument cluster (A1) | Via chassis CAN 2 (CAN E2), electronic ignition lock control unit (N73), chassis CAN 1 (CAN E1) and powertrain control unit (N127) |
Supplemental Restraint System control unit (N2/10) | | Via chassis CAN 1 (CAN E1) and powertrain control unit (N127) |
SAM control unit (N10) | | Via interior CAN (CAN B), electronic ignition lock control unit (N73), chassis CAN 1 (CAN E1) and powertrain control unit (N127) |
AAC control and operating unit (N22/7) | | Via interior CAN (CAN B), electronic ignition lock control unit (N73), chassis CAN 1 (CAN E1) and powertrain control unit (N127) |
Electronic Stability Program control unit (N30/4) | | Via chassis CAN 1 (CAN E1) and powertrain control unit (N127) |
Radar sensors control unit (N62/1) (for code 23P (Driving assistance package PLUS)) | | Via chassis FlexRay (Flex E), chassis gateway control unit (N93/7), chassis CAN 1 (CAN E1) and powertrain control unit (N127) |
Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | Via chassis CAN 1 (CAN E1) 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), chassis CAN 1 (CAN E1) and powertrain control unit (N127) |
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 control voltage range, it has both short-circuit protection and reversed polarity protection. Power is supplied through several pins connected in parallel to relieve the electrical connection.
Ground connection
The ground connection "circuit 31" is made over a number of ground lines to the front right ground point for lamp unit (W2).
Information for partial function "no-load current shutoff" is documented in the function description "Engine OFF energy management function".
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.