ME-SFI [ME] control unit, component description - GF07.61-P-6000MAG

ENGINE 156.980 in MODEL 164.177 as of Model Year 09/Modification Year 08 model refinement package

View of engine compartment from rear right

Fig 1: View Of Engine Compartment (Rear Right)

Courtesy of MERCEDES-BENZ USA

Location

The ME-SFI [ME] control unit is located behind the front right wheel well, between the fender and side wall.

Task

The ME-SFI control unit provides the engine control in electrical connection with the engine 156 AMG sensors and actuators.

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
Drive authorization system and immobilizer
Regulated camshaft adjustment
Intake manifold changeover
Heat management
Torque interface
Alternator interface
Emission control
Fuel evaporation control system
Flash programming

Input and output signals

The following input signals are evaluated by the engine control and issued in the respective output signals:

Direct input signals
Direct output signals
LIN signals
CAN input signals
CAN output signals

Direct input signals

Tml. 15
Circuit 30 (fused)
Tml. 31
Circuit 87M1
Knock sensor, right (A16/1)
Knock sensor, left (A16/2)
Oil temperature sensor (B1)
Left hot film mass air flow sensor (B2/6)
Right hot film mass air flow sensor (B2/7)
Tank pressure sensor (B4/3) (with code (494) USA version)
Fuel pressure sensor (B4/15)
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)
Intake air temperature sensor (B17)
Pressure sensor (B28) (intake manifold air pressure)
Accelerator pedal sensor (B37) - potentiometer 1
Accelerator pedal sensor - potentiometer 2
Crankshaft Hall sensor (B70)
Left O₂ sensor, upstream of CAT (G3/3) (wideband oxygen sensor)
Right O₂ sensor, upstream of CAT (G3/4) (wideband oxygen sensor)
LH O₂ sensor downstream of CAT (G3/5) (non-linear oxygen sensor)
RH O₂ sensor downstream of CAT (G3/6) (non-linear oxygen sensor)
Front throttle valve - actual value potentiometer 1 (M16/3r1)
Front throttle valve - actual value potentiometer 2 (M16/3r2)
Rear throttle valve - actual value potentiometer 1 (M16/4r1)
Rear throttle valve - actual value potentiometer 2 (M16/4r2)
Restraint systems control unit (N2/7)
Oil level indicator switch (S43)

Direct output signals

Engine connector - sensor voltages 1 and 2 (5 V)
Vehicle connector - sensor voltages 1 and 2 (5 V)
Engine connector - sensor grounds 1 and 2
Vehicle connector - sensor ground 1
Accelerator pedal sensor - reference ground of potentiometers 1 and 2
LH O₂ sensor upstream of CAT (G3/3) - oxygen sensor heater
RH O₂ sensor upstream of CAT (G3/4) - oxygen sensor heater
LH O₂ sensor downstream of CAT (G3/5) - oxygen sensor heater
RH O₂ sensor downstream of CAT (G3/6) - oxygen sensor heater
Engine and air conditioning electric suction fan with integrated control (M4/7) - specified speed of the fan
Front throttle valve - actuator motor (M16/3m1) +
Front throttle valve - actuator motor (M16/3m1) -
Rear throttle valve - actuator motor (M16/4m1) +
Rear throttle valve - actuator motor (M16/4m1) -
Two-disk thermostat heating element (R48)
Coolant circulation pump relay (F58kC) (engine oil heat exchanger)
Engine circuit 87 relay (F58kD)
Air pump relay (F58kE)
Starter relay (F58kI)
LH and RH fuel pump control unit (N118/3, N118/4) "fuel pump ON" ground signal
LH and RH fuel pump control unit - "specified fuel pressure" pulse width modulated (PWM) signal
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)
Heating system shutoff valve (Y16/2)
Variable intake manifold changeover valve (Y22/6)
Air pump changeover valve (Y32)
Left intake camshaft solenoid (Y49/4)
Right intake camshaft solenoid (Y49/5)
Left exhaust camshaft solenoid (Y49/6)
Right exhaust camshaft solenoid (Y49/7)
Purge control valve (Y58/1)
Activated charcoal canister shutoff valve (Y58/4) (with code (494) USA version)
Cylinder 1 fuel injection valve (Y62y1)
Cylinder 2 fuel injection valve (Y62y2)
Cylinder 3 fuel injection valve (Y62y3)
Cylinder 4 fuel injection valve (Y62y4)
Cylinder 5 fuel injection valve (Y62y5)
Cylinder 6 fuel injection valve (Y62y6)
Cylinder 7 fuel injection valve (Y62y7)
Cylinder 8 fuel injection valve (Y62y8)
Engine speed signal (TN)

LIN signals

Alternator interface via drive LIN (LIN C1)

CAN input signals

Instrument cluster (A1)

Fuel reserve signal

Restraint systems control unit (N2/7)

Crash signal

ESP control unit (N47-5)

Vehicle speed
Wheel speed signal
Brake recognition
Cruise control request
Engine torque request

Electric controller unit (VGS) (Y3/8)

Drive position
Transmission mode
Actual gear, target gear
Engine torque reduction request
Starter enable in selector lever position "P, N"
Engine idle specified speed (for actuation of the torque converter lockup clutch)
Status of torque converter lockup clutch
Emergency transmission control

Comfort AAC [KLA] control and operating unit (N22/7)

Specified fan speed request
Engine torque request

EIS control unit (N73)

Start enable (drive authorization system)

LH and RH fuel pump control unit (N118/3, N118/4)

Fuel supply status
Self-diagnosis data
Requested diagnostic data

CAN output signals

Instrument cluster

Engine oil level
Engine oil temperature
Engine oil quality
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))

EIS control unit

Start query (drive authorization system)

LH and RH fuel pump control unit

Diagnosis requests

Electric controller unit (VGS)

Requests for catalytic converter heating
Switching request
Engine torque
Engine coolant temperature
Engine oil temperature
Engine speed
Engine load
Kickdown
Engine speed limitation active
Limp-home mode engine control

Design

The housing of the ME-SFI [ME] control unit is made out of diecast aluminum and the cover is made out of corrosion-proof sheet steel. The ME-SFI [ME] control unit is protected against water and dusts. The housing contains the 32-bit measuring and control electronics for the engine control.

Voltage supply

The ME-SFI [ME] control unit is "circuit 30 secured" and also supplied with voltage for ignition ON by "circuit 87 M1".

It is fitted in the operating voltage range with short-circuit protection as well as reversed polarity protection.

In certain cases voltage is supplied through several pins connected in parallel by to relief the electrical connectors.

Ground connection

The ground connection "circuit 31" is made via a number of ground lines to the right major assemblies compartment ground, power ground (W16/4).

Computer run-on

If the ME-SFI control unit (N3/10) receives the "Circuit 15 OFF" signal, a computer power-down time of about 5 s is initiated.

However, it may also last for several minutes due to various functions (for example, on-board diagnosis, drive authorization system, thermal management).

Assembly operations

Ensure before unplugging the plug on the ME-SFI [ME] control unit that the ignition is switched off and computer run-on has ended. This is to prevent damage to the ME-SFI control unit and save errors in the control units linked to the CAN.

Variants

The engine control variants, such as country and exhaust gas variants, are activated with the Diagnosis Assistance System (DAS) using the variant coding function.

Replacement of the ME-SFI [ME] control unit is not necessary.

	Wiring diagram for ME-SFI [ME] gasoline injection and ignition system control unit	N3/10	Vehicle connector (Specification 1)	PE07.61-P-2101-99MAE
		N3/10	Engine connector (Specification 2)	PE07.61-P-2101-99MAF