Engine top front view |
N3/10 | ME-SFI [ME] control unit |
P01.10-3367-76
Location
The ME-SFI [ME] control unit is located beside the air filter to the left of the 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
Controlling the engine basic functions
Ignition
Start
Fuel supply
Injection control
Ignition system
Synchronization of injection and firing order
Start, post-start phase and warm-up enrichment
Engine speed control
Lambda control
Smooth running control
Heat management
Torque coordination
Inertia fuel shutoff
Knock sensor system
Camshaft adjustment
Engine limp-home mode
European On-Board Diagnosis
Generator interface (except code B01 (48V-technology))
ECO start/stop function
Charging
Exhaust treatment
Electronic accelerator
Purge control
Crankcase ventilation system
Reading in of signals
Input factors are read in over the following connections:
Direct line
Drive-LIN (LIN C1)
Engine LIN (LIN C2)
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 relevant 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 LIN
Engine CAN
Drive train CAN
Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
Terminal 15 | - | - |
Circuit 30 (fused) | - | - |
Circuit 31 | - | - |
Circuit 87 M1, M4 | - | - |
Knock sensor 1 (A16/1) | - | - |
Knock sensor 2 (A16/2) | - | - |
Fuel pressure and temperature sensor (B4/25) | - | - |
Intake camshaft Hall sensor (B6/15) | - | - |
Exhaust camshaft Hall sensor (B6/16) | - | - |
Coolant temperature sensor (B11/4) | - | - |
Pressure sensor downstream of air filter (B28/11) | - | - |
Pressure and temperature sensor upstream of throttle valve (B28/26) | - | - |
Pressure and temperature sensor downstream of throttle valve (B28/27) | - | - |
Engine oil fill level sensor (B40/6) | - | - |
Crankshaft Hall sensor (B70) | - | - |
Starter circuit 50 relay (K40/8kH) | - | Except code B01 (48V-technology) |
Engine compartment circuit 15 relay (K40/8kG) | - | - |
Circuit 87M relay (K40/8kN) | Circuit 87M relay (K40/8kN) | - |
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) | - |
- | Throttle valve actuator motor (M16/6m1) | - |
Actual value potentiometer 1 (M16/6r1), throttle valve | - | - |
Actual value potentiometer 2 (M16/6r2), throttle valve | - | - |
Boost pressure control flap actuator (M16/7) | Boost pressure control flap actuator | - |
Supplemental Restraint System control unit (N2/10) | - | - |
- | Fuel system control unit (N118) | - |
- | Coolant thermostat heating element(R48) | - |
- | Cylinder 1 ignition coil (T1/1) | - |
- | Cylinder 2 ignition coil (T1/2) | - |
- | Cylinder 3 ignition coil (T1/3) | - |
- | Cylinder 4 ignition coil (T1/4) | - |
- | Intake camshaft solenoid (Y49/1) | - |
- | Exhaust camshaft solenoid (Y49/2) | - |
- | Intake camshaft valve lift changeover actuator (Y49/8) | - |
- | Purging switchover valve (Y58/1) | - |
- | Partial load operation crankcase ventilation system valve (Y58/2) | - |
- | Cylinder 1 fuel injector (Y76/1) | - |
- | Cylinder 2 fuel injector (Y76/2) | - |
- | Cylinder 3 fuel injector (Y76/3) | - |
- | Cylinder 4 fuel injector (Y76/4) | - |
- | Quantity control valve (Y94) | |
- | Deceleration air switchover valve (Y101) | - |
- | Engine oil pump valve (Y130) | - |
Input parameters and initial parameters for the following assembly parts 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 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) |
Left front door control unit (N69/1) | - | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | Via the chassis FlexRay (Flex E) and powertrain control unit (N127) |
Powertrain control unit (N127) | Powertrain control unit (N127) | - |
Diagnostics connection (X11/4) | Diagnostics connection (X11/4) | Via diagnostic CAN (CAN D), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
Input factors via drive train CAN (CAN C1) | Initial parameters via drive train CAN (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) |
AIRMATIC control unit (N51/3) (model 205 with code 483 (ADVANCED AGILITY package) and code 489 (AIRMATIC)), AIR BODY CONTROL control unit (N51/3) (model 253 with code 489 (AIR BODY CONTROL)) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
Mercedes-Benz Intelligent Drive control unit (N62/4) (with code 23P (Driving Assistance Package)) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
Steering column tube module control unit (N80) | - | 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) | - |
Input factors via the drive-LIN (LIN C1) | Input factors via the drive-LIN (LIN C1) | Supplemental information |
Alternator (G2) | Alternator (G2) | Except code B01 (48V-technology) |
Input factors via engine LIN (LIN C2) | Output factors via engine LIN (LIN C2) | Supplemental information |
Electric coolant pump 2 (M43/1) | Electric coolant pump 2 (M43/1) | Model 253 with code B01 (48V technology) |
Starter-alternator coolant pump (M43/4) | Starter-alternator coolant pump (M43/4) | Model 205 with code B01 (48V technology) |
Electric coolant pump (M75/11) | Electric coolant pump (M75/11) | - |
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 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.
Ground connection
The "circuit 31" ground connection takes place over a number of ground lines.
Variants
The engine management variants, for example national versions and exhaust variants, are activated using XENTRY Diagnostics via the variant coding. Exchange of the ME-SFI [ME] control unit is not necessary.