Shown: engine 278 from the top front |
N3/10 | ME-SFI [ME] control unit |
P07.70-2204-76
Location
The ME-SFI [ME] control unit is located at the center on the charge air distributor.
Task
The ME-SFI [ME] control unit creates in an electrical combination with the sensors and actuators of engine 157 and 278 DE (Direct Injection) the engine timing.
The following systems and functions are controlled and coordinated by the ME-SFI [ME] control unit according to input signals:
Ignition system
Fuel supply
Injection control
Electronic accelerator
Diagnosis and fault storage
Engine start/stop function (for code B03 (ECO start/stop function))
Drive authorization system and immobilizer
Regulated camshaft adjustment
Boost pressure control
Thermal management
Torque interface
Alternator interface
Exhaust treatment
Input and output signals
The following input signals are evaluated by the engine timing system and respective output signals are issued:
Direct input signals
Direct output signals
LIN signals
CAN input signals
CAN output signals
Direct input signals
Terminal 15
Circuit 30 (fused)
Circuit 31
Circuit 87M4
Left cylinder bank front knock sensor (A29/1)
Left cylinder bank rear knock sensor (A29/2)
Right cylinder bank front knock sensor (A30/1)
Right cylinder bank rear knock sensor (A30/2)
Fuel tank pressure sensor (B4/3) (for 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) (model 207, 212), coolant temperature sensor (B11/4) (model 218)
Charge air temperature sensor (B17/8)
Pressure sensor downstream of left cylinder bank air filter (B28/4)
Pressure sensor downstream of air filter (B28/5), cylinder bank on the right
Pressure sensor upstream of throttle valve (B28/6)
Pressure sensor downstream of throttle valve (B28/7)
Accelerator pedal sensor (B37) - potentiometer 1
Accelerator pedal sensor - potentiometer 2
Crankshaft Hall sensor (B70)
On-board electrical system battery (G1)
Left oxygen sensor upstream of catalytic converter (G3/3)
Right oxygen sensor upstream of catalytic converter (G3/4)
Left oxygen sensor downstream of catalytic converter (G3/5)
Right oxygen sensor downstream of catalytic converter (G3/6),
Internal combustion engine and air conditioning fan motor with integrated control (M4/7) - status as a ground signal via the actuation line
Actual value potentiometer 1 (M16/6r1), throttle valve
Actual value potentiometer 2 (M16/6r2), throttle valve
Circuit 15 relay (N10/1kJ)
Engine circuit 87 relay (N10/1kJ)
Crash signal from the supplemental restraint system control unit (N2/10)
Oil level check switch(S43) (for engine 278)
Direct output signals
Sensor voltages 1 and 2 (5 V) - engine plug
Sensor voltages 1 and 2 (5 V) - vehicle plug
Ground connections 1 and 2 - engine plug
Ground connection 1 - engine plug
Accelerator pedal sensor - reference masses for potentiometer 1 and 2
LH oxygen sensor upstream of catalytic converter - oxygen sensor heater
RH oxygen sensor upstream of catalytic converter - oxygen sensor heater
LH oxygen sensor downstream of catalytic converter - oxygen sensor heater
RH oxygen sensor downstream of catalytic converter - oxygen sensor heater
Coolant circulation pump relay (K60)
Fan motor for internal combustion engine and air conditioning system with integrated control (M4/7) - specified fan speed
Actuator motor (M16/6m1, throttle valve (plus)
Actuator motor (M16/6m1), throttle valve (minus)
Starter circuit 50 relay (N10/1kJ)
Engine circuit 87 relay (N10/1kJ)
Fuel system control unit (N118) - "fuel pump ON" ground signal
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)
Cylinder 5 ignition coil (T1/5)
Cylinder 6 ignition coil (T1/6)
Cylinder 7 ignition coil (T1/7)
Cylinder 8 ignition coil (T1/8)
Boost pressure control pressure transducer (Y31/5)
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) (for 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)
Cylinder 7 fuel injector (Y76/7)
Cylinder 8 fuel injector (Y76/8)
Left quantity control valve (Y94/1)
Right quantity control valve (Y94/2)
Engine oil pump valve (Y130)
LIN signals
Alternator interface via drive LIN (LIN C1)
Oil sensor (oil level, temperature and quality) (B40) via the drive LIN (for engine 157)
CAN input signals
Instrument cluster (A1)
Fuel reserve signal
Supplemental Restraint System control unit (N2/10)
Crash signal
Driver seat belt applied
Rear SAM control unit with fuse and relay module (N10/2)
Engine hood closed (for code 551 (Anti-theft alarm system (ATA))
Specified fan speed request
Air conditioning status
Engine torque request
Engine start request
Engine stop prohibition
Electronic Stability Program control unit (N30/4) (except code 233 (DISTRONIC PLUS), Electronic Stability Program Premium control unit (N30/7) (for code 233 (DISTRONIC PLUS))
Vehicle speed
Wheel speed signal
Brake recognition
Cruise control request
Engine torque request (increase)
Engine torque request (reduction)
Engine start request
Engine stop prohibition
Engine stop release
AIRMATIC control unit (N51/3) (for code 489 (AIRmatic (air suspension with continuous adjustment damping)))
Engine start request
Engine stop prohibition
Radar sensors control unit (N62/1) (for model 207, 212 as of model year Model 2014 with code 23P (Driving Assistance Package Plus), model 218 as of model year 2015 with code 23P (Driver Assistance Package Plus))
Engine torque request (increase)
Engine torque request (reduction)
Video and radar sensor system control unit (N62/2) (for model 207, 212 up to model year) 2014, model 218 up to model year 2015 with code 233 (DISTRONIC PLUS), with code 237 (Active Blind Spot Assist), with code 238 (Active Lane Keeping Assist))
Engine torque request (increase)
Engine torque request (reduction)
Left front door control unit (N69/1)
Driver door closed
Upper control panel control unit (N72/1)
Status button for ECO start/stop function (N72/1s50) (for code B03 (ECO start/stop function))
Electronic ignition lock control unit (N73)
Start enable (drive authorization system)
Steering column tube module control unit (N80)
Steering wheel angle
Steering wheel angular velocity
Fuel system control unit (N118)
Fuel pressure
Self-diagnosis data
Requested diagnostic data
Fully integrated transmission control controller unit (Y3/8)
Gear range
Transmission mode
Current gear, target gear
Engine torque reduction request
Starter enable in selector lever position "P" or "N"
Target engine speed for engine idle (for actuation of the torque converter lockup clutch for electric motor 278 or the start-up clutch for engine 157)
Status of the torque converter lockup clutch (for engine 278)
Status of the start-up clutch (for engine 157)
Transmission control limp-home mode
Transmission oil temperature
CAN output signals
Instrument cluster
Oil level too low
Circuit 61 signal (generated by ME-SFI [ME] control unit)
Fuel consumption (the trip computer is informed about the current fuel consumption by means of square-wave pulse packages (1 pulse = 0.2 l/h))
Electronic ignition lock control unit
Start enable request (drive authorization system)
Fuel system control unit
Fuel pump ON
Fuel specified pressure
Diagnosis request
Fully integrated transmission control controller unit
Requests for catalytic converter heating
Shift request
Engine torque
Engine coolant temperature
Engine oil temperature
Engine speed
Engine load
Kickdown
Engine speed limitation active
Engine timing limp-home mode
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 housing contains the 32-bit measuring and control electronics for the engine timing.
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 several ground lines to the left major assembly compartment electronics ground point (W16/5).
Information about the partial function "no-load current switch off" is documented in the function description "engine OFF energy management function".
Variants
The engine timing variants (e.g. national and exhaust variants) are activated with Xentry Diagnostics using the variant coding function.
Exchange of the ME-SFI [ME] control unit is not necessary.
Wiring diagram for gasoline-DI control unit | N3/10 vehicle connector model 207 | ||
N3/10 engine connector model 207, sheet 1 | |||
N3/10 engine connector model 207, sheet 2 | |||
N3/10 vehicle connector model 212 | |||
N3/10 Engine connector model 212, sheet 1 | |||
N3/10 Engine connector model 212, sheet 2 | |||
N3/10 vehicle connector model 218 | |||
N3/10 engine connector model 218, sheet 1 | |||
N3/10 engine connector model 218, sheet 2 |