Component description for ME-SFI (ME) control unit - GF07.61-P-6000MMA

ENGINE 157.9 in MODEL 212, 218 

ENGINE 278.9 in MODEL 207, 212, 218 

Shown: engine 278 from the top front 

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 (D  irect I  njection) 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 87 M4
• 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	PE07.08-P-2101-97EAI
		N3/10 engine connector model 207	PE07.08-P-2101-97EAG
		N3/10 engine connector model 207	PE07.08-P-2101-97EAH
		N3/10 vehicle connector model 212	PE07.08-P-2101-97DAE
		N3/10 Engine connector model 212	PE07.08-P-2101-97DAF
		N3/10 Engine connector model 212	PE07.08-P-2101-97DAG
		N3/10 vehicle connector model 218	PE07.08-P-2101-97XAA
		N3/10 engine connector model 218	PE07.08-P-2101-97XAB
		N3/10 engine connector model 218	PE07.08-P-2101-97XAC