Component description for ME-SFI [ME] control unit - GF07.61-P-6000MQH

ENGINES 272.973 in MODEL 164.195 

Engine compartment from the front left 

Location 

The ME-SFI [ME] control unit is located in the front right wheel well.

Task 

The ME-SFI [ME] control unit creates the engine control in electrical connection with the sensors and actors of engine 272 KE Hybrid.

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
• Emission control
• Power electronics cooling system

The ME-SFI [ME] control unit exchanges data to do this via the attached engine compartment-CAN (CAN C), drive train CAN (CAN C1) and hybrid CAN (CAN L) with other control units which are integrated in the CAN network.

The ME-SFI [ME] control unit also acts as the interface (gateway) between the three CAN bus systems.

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 

• Circuit 15
• Circuit 30 (fused)
• Circuit 31
• Circuit 87M1
• Knock sensor 1, on the right (A16/1)
• Knock sensor 2, on the left (A16/2)
• Tank leak diagnostic module (A101)
• Hot film mass air flow sensor (B2/5)
• Intake air temperature sensor (B2/5b1)
• Fuel tank pressure and temperature sensor (B4/25) - tank pressure
• LH intake camshaft Hall sensor (B6/4)
• Right intake camshaft Hall sensor (B6/5)
• Left exhaust camshaft Hall sensor (B6/6)
• RH exhaust camshaft Hall sensor (B6/7)
• Low-temperature circuit temperature sensor (B10/13)
• Coolant temperature sensor (B11/4)
• 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 the catalytic converter (G3/3) (wideband oxygen sensor)
• Right O₂ sensor, upstream of the catalytic converter (G3/4) (wideband oxygen sensor)
• LH O₂ sensor downstream of catalytic converter (G3/5) (non-linear oxygen sensor)
• RH O₂ sensor downstream of catalytic converter (G3/6) (non-linear oxygen sensor)
• Throttle valve - actual value potentiometer 1 (M16/6r1)
• Throttle valve - actual value potentiometer 2 (M16/6r2)
• Crash signal from the restraint system control unit (N2/7)
• Oil level check switch (S43)
• Hybrid engine hood contact switch (S62/51)

Direct output signals 

• Sensor voltages 1 and 2 (5 V) - engine plug
• Sensor voltages 1 and 2 (5 V) - vehicle plug
• Sensor grounds 1 and 2 - engine plug
• Sensor ground 1 - vehicle plug
• Tank leak diagnostic module (A101)
• Accelerator pedal sensor - reference ground for potentiometer 1
• Accelerator pedal sensor - reference ground for potentiometer 2
• LH O₂ sensor upstream of the catalytic converter - sensor heater
• RH O₂ sensor upstream of the catalytic converter - sensor heater
• LH O₂ sensor downstream of the catalytic converter - sensor heater
• RH O₂ sensor downstream of the catalytic converter - sensor heater
• Engine and air conditioning electric suction fan with integrated control (M4/7) - specified speed of the fan
• Throttle valve - actuator motor (M16/6m1) +
• Throttle valve - actuator motor (M16/6m1) -
• Engine circuit 87 relay (F58kD)
• Air pump relay (F58kE)
• Power electronics circulation pump relay (K108)
• Fuel pump control unit (N118) - signal "fuel pump ON"
• 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)
• Heating system shutoff valve (Y16/2)
• Variable intake manifold changeover 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)
• Right exhaust camshaft solenoid (Y49/7)
• Purge control valve (Y58/1)
• Tank system shutoff valve (Y58/16)
• 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)
• Three-disk thermostat valve (Y110)
• Engine oil pump valve (Y130)
• Crank signal from the power electronics control unit (N129/1)

LIN signals 

• PremAir sensor (B11/15) via the drivetrain LIN (LIN C1)

CAN input signals 

Instrument cluster (A1) 

• Fuel reserve signal

Restraint systems control unit (N2/7) 

• Crash signal

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

• Specified fan speed request
• Engine torque request

Regenerative braking system control unit (N30/6) 

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

EIS [EZS] control unit (N73) 

• Start enable (drive authorization system)
• Circuit 15, status

Hybrid vehicle fully integrated transmission controller unit (Y3/10) 

• Drive position
• Transmission mode
• Actual gear, target gear

Fuel system control unit (N118) 

• Diagnostic data

Power electronics control unit (N129/1) 

• Automatic engine start/stop
• Torque request

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))

Fuel pump control unit 

• Diagnosis requests

Hybrid vehicle fully integrated transmission controller unit 

• Requests for catalytic converter heating
• Switching request
• Engine coolant temperature
• Engine oil temperature
• Engine speed

Power electronics control unit 

• Engine coolant temperature
• Engine speed
• Engine torque
• Engine hood closed/open
• Coolant temperature of cooling system for power electronics
• Status of engine control
• Specified axle torque request

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.

Power 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.

Voltage is supplied through several pins connected in parallel to relieve 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 [ME] control unit receives the signal "circuit 15 OFF", a processor run-on of approx. 30 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 or a tank leak test). If the journey taken before receiving the signal "circuit 15 OFF" was shorter than 10 minutes the computer power-down can last up to 10 minutes due to a tank leak test. For longer journeys than 10 minutes the computer power-down lasts at least until the tank leak test has ended, bit a maximum of up to 5 min.

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 [ME] 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 DAS (Diagnosis Assistance System) 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 plug	PE07.61-P-2101-97MAJ
		N3/10	Engine plug	PE07.61-P-2101-97MAI