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

ENGINE 156.9 in MODEL 204, 212 

View of right rear engine compartment, model 204 

Location 

The ME-SFI [ME] control unit is located at the rear right in the engine compartment.

View of right front wheel arch, model 212 

Location 

The ME-SFI control unit is located in the front right wheel arch.

Task 

The ME-SFI control unit provides the engine timing 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:

• Heating system shutoff valve (Y16/2)
• Intake manifold switchover valve (Y22/6)
• Air pump switchover valve (Y32)
• Left intake camshaft solenoid (Y49/4)
• Right intake camshaft solenoid (Y49/5)
• Left exhaust camshaft solenoid (Y49/6)

• Ignition system
• Fuel supply
• Injection control
• Electronic accelerator
• Diagnosis and fault storage
• Drive authorization system and immobilizer
• Regulated camshaft adjustment
• Intake manifold switchover
• 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 

• Circuit 15
• Circuit 30 (fused)
• Circuit 31
• Circuit 87 M1
• Knock sensor on the right (A16/1)
• Knock sensor on the left (A16/2)
• Oil temperature sensor (B1)
• Left hot film MAF sensor (B2/6)
• Right hot film MAF sensor (B2/7)
• Fuel tank pressure sensor (B4/3) (for 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)
• LH oxygen sensor upstream of catalytic converter (G3/3) (wideband oxygen sensor)
• RH oxygen sensor upstream of catalytic converter (G3/4) (wideband oxygen sensor)
• LH oxygen sensor downstream of catalytic converter (G3/5) (narrow band oxygen sensor)
• RH oxygen sensor downstream of catalytic converter (G3/6) (narrow band 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)
• Crash signal from supplemental restraint system control unit (N2/10) (model 204), supplemental restraint system control unit (N2/10) (model 212)
• Oil level check switch (S43)

Direct output signals 

• Sensor voltages 1 and 2 (5 V) - engine connector
• Sensor voltages 1 and 2 (5 V) - vehicle connector
• Sensor grounds 1 and 2 - engine connector
• Sensor ground 1 - vehicle connector
• 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
• Fan motor for internal combustion engine and air conditioning system with integrated control (M4/7) - specified fan speed
• 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) +
• Circuit 50 relay, starter (N10/1kM)
• Engine circuit 87 relay (N10/1kN)
• Secondary air injection relay (N10/1kP)
• Oil cooler fan motor relay (K25) (model 212, model 204 except code (P98) Black Series)
• Left and right fuel system control unit (N118/3, N118/4) (on model 204) or fuel system control unit (N118) (for model 212) - ground signal "Fuel pump ON"
• Left and right fuel system control unit (on model 204) or fuel system control unit (on model 212) - pulse width modulated signal (PWM signal) "Fuel specified pressure"
• 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)
• Right exhaust camshaft solenoid (Y49/7)
• Purging switchover valve (Y58/1)
• Activated charcoal canister shutoff valve (Y58/4) (with code (494) USA version)
• Cylinder 1 injection valve (Y62/1)
• Cylinder 2 injection valve (Y62/2)
• Cylinder 3 injection valve (Y62/3)
• Cylinder 4 injection valve (Y62/4)
• Cylinder 5 injection valve (Y62/5)
• Cylinder 6 injection valve (Y62/6)
• Cylinder 7 injection valve (Y62/7)
• Cylinder 8 injection valve (Y62/8)

LIN signals 

• Alternator interface via the drive LIN (LIN C1)

CAN input signals 

Instrument cluster (A1) 

• Fuel reserve signal

Supplemental restraint system control unit (model 204), supplemental restraint system control unit (model 212) 

• Crash signal

Automatic air conditioning control and operating unit (N22/7) 

• Air conditioning status
• Specified fan speed request

Electronic stability program control unit (N30/4) or Premium electronic stability program control unit (N30/7) (for model 212 with code (233) DISTRONIC PLUS) 

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

Radar sensors control unit (N62/1) (for model 212 with code (233) DISTRONIC PLUS) 

• Engine torque request

Electronic ignition lock control unit (N73) 

• Start enable (drive authorization system)

Fully integrated transmission control controller unit (Y3/8) 

• Gear range
• Transmission mode
• Actual gear, target gear
• Engine torque request (reduction)
• 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/wet clutch
• Limp-home mode transmission control

Left and right fuel system control unit (for model 204) or fuel system control unit (for model 212) 

• Fuel supply status
• Self-diagnosis data
• Requested diagnostic data

CAN output signals 

Instrument cluster 

• Engine 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))
• Engine speed

Fully integrated transmission control controller unit 

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 timing

Left and right fuel system control unit (for model 204) or fuel system 

control unit (for model 212) 

• Diagnosis requests

Body 

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

Voltage supply 

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

In the operating voltage range it has both short-circuit protection and reversed polarity protection.

Power is supplied through several pins connected in parallel to relieve the electrical connectors.

Ground connection 

The "circuit 31" ground connection is made via several ground lines to the left major assembly compartment electronics ground point (W16/5).

Computer power-down 

If the ME-SFI [ME] control unit receives the signal "circuit 15 OFF", a processor run-on of approx. 5 seconds is started.

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

Removal:  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 [ME] control unit and save errors in the control units linked to the CAN.

Variants 

The engine timing variants (e.g. national and exhaust variants) are activated with Xentry Diagnostics 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 model 204	PE07.61-P-2101-97FAF
		N3/10 vehicle connector model 212	PE07.61-P-2101-97DAD
		N3/10 engine connector model 204	PE07.61-P-2101-97FAE
		N3/10 engine connector model 212	PE07.61-P-2101-97DAC