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 system
Start
Fuel supply
Injection control
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
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
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 affected components are then actuated.
Output of signals and actuation of components
Initial parameter are output over the following connections:
Direct line
Engine CAN
Drive train CAN
Engine LIN
Input factors over a direct line from | Output factors over a direct line to | Supplemental information |
Terminal 15 | - | - |
Circuit 30 (fused) | - | - |
Circuit 31 | - | - |
Circuit 87 M1, M4 | - | - |
Knock sensor 1 (A16/1) | - | - |
Knock sensor 2 (A16/2) | - | - |
- | Fuel tank diagnostic module pump (A101m1) | |
- | Fuel tank diagnostic module heating element (A101r1) | |
- | Fuel tank diagnostic module solenoid valve (A101y1) | |
Temperature sensor upstream of gasoline particulate filter (B163/4) | - | With code 598 (Gasoline particulate filter (OPF) with sensor system) |
Gasoline particulate filter differential pressure sensor (B163/3) | - | With code 598 (Gasoline particulate filter (OPF) with sensor system) |
Purging pressure sensor (B4/4) | - | |
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) | - | - |
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 (M16/7) | - |
Supplemental Restraint System control unit (N2/10) | - | - |
- | Fuel system control unit (N118) | - |
- | Coolant thermostat heating element(R48) | - |
Bleed line contact switch 1 (S88/15) | - | |
Vent line contact switch 2 (S88/16) | - | |
Bleed line contact switch 3 (S88/17) | - | |
- | 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 factors over engine CAN (CAN C) from | Initial parameters over engine CAN (CAN C) to | 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 suspension 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 over drive CAN (CAN C1) from | Initial parameters over drive CAN (CAN C1) to | 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) (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 engine LIN (LIN C2) from | Output factors via engine LIN (LIN C2) to | Supplemental information |
Starter-alternator coolant pump (M43/4) | Starter-alternator coolant pump (M43/4) | |
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.
Variants
The engine management variants, such as country and exhaust variants, are activated via variant coding. Exchange of the ME-SFI [ME] control unit is not necessary.