GF07.61-P-6000MGA ME-SFI [ME] Control Unit, Component Description
GF07.61-P-6000MGA ME-SFI [ME] Control Unit, Component Description
ENGINES 271.861 in MODEL 172.4
Shown: engine compartment from the front left
N3/10 ME-SFI [ME] control unit
Location
The ME-SFI [ME] control unit is located on the left at the air filter housing.
Task
The ME-SFI [ME] control unit represents the engine control, when connected electrically to the sensors and actuators of engine 271 EVO.
The following systems and functions are controlled and coordinated by the ME-SFI [ME] control unit according to input signals:
- Ignition system
- Fuel supply
- High pressure gasoline injection
- Electronic accelerator
- Diagnosis and fault storage
- Engine timing start stop function (for code (B03) ECO start/stop function)
- Drive authorization system and immobilizer
- Regulated camshaft adjustment
- Charge pressure control
- Torque interface
- Alternator interface
- Heat management
- Emission control
Input and output signals
The following input signals are evaluated by the engine control 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 87M1.2
- Circuit 87M2.2
- Rear knock sensor (A16/1)
- Front knock sensor (A16/4)
- Fuel tank pressure sensor (B4/3) (with code (494) USA version)
- Rail pressure sensor (B4/6)
- Intake camshaft Hall sensor (B6/15)
- Exhaust camshaft Hall sensor (B6/16)
- Coolant temperature sensor (B11/4)
- Charge air temperature sensor (B17/8)
- Pressure sensor upstream of throttle valve (B28/6)
- Pressure sensor downstream of throttle valve (B28/7)
- Pressure sensor upstream of compressor impeller (B28/15)
- Crankshaft Hall sensor (B70)
- Accelerator pedal sensor (B37) - potentiometer 1
- Accelerator pedal sensor - potentiometer 2
- Position sensor for transmission neutral (B79/2) (for manual transmission with code (B03) ECO start/stop function)
- Oxygen sensor downstream of catalytic converter (G3/1)
- Oxygen sensor upstream of catalytic converter (G3/2)
- Fan motor for combustion engine and air conditioning system with integrated control (M4/7) - feedback
- Throttle valve actual value potentiometer 1 (M16/6r1)
- Throttle valve actual value potentiometer 2 (M16/6r2)
- Swirl flap Hall sensor (M59b1)
- Circuit 15 relay (N10/1kJ)
- Crash signal from supplemental restraint system control unit (N2/10)
- Clutch pedal switch (S40/3) (for manual transmission)
- Clutch pedal switch start enable (S40/5) (for manual transmission)
- Oil level check switch (S43)
Direct output signals
- Sensor voltages (5 V) - engine connector
- Sensor voltages (5 V) - vehicle connector
- Sensor grounds - engine connector
- Sensor ground - vehicle connector
- Accelerator pedal sensor - reference masses for potentiometer 1 and 2
- Oxygen sensor upstream of catalytic converter - oxygen sensor
- Oxygen sensor downstream of catalytic converter - oxygen sensor heater
- Combustion engine and air conditioning fan motor with integrated control - specified fan speed
- Throttle valve - actuator motor (M16/6m1) +
- Throttle valve - actuator motor (M16/6m1) -
- Swirl flap actuator motor (M59m1) +
- Swirl flap actuator motor (M59m1) -
- Circuit 50 starter relay (N10/1kM)
- Engine circuit 87 relay (N10/1kN)
- Secondary air injection relay (N10/1kP) (for code (498) Japan version)
- Fuel pump control unit (N118) - "fuel pump ON" ground signal
- Wide open throttle operation vent line heating element (R39/2)
- 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)
- Heating system shutoff valve (Y16/2)
- Boost pressure control transducer (Y31/5)
- Air pump switchover valve (Y32) (with code (498) Japan version)
- Intake camshaft solenoid (Y49/1)
- Exhaust camshaft solenoid (Y49/2)
- Purge control valve (Y58/1)
- Activated charcoal canister shutoff valve (Y58/4) (with 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)
- Radiator shutters actuator (Y84)
- Quantity control valve (Y94)
- Divert air switchover valve (Y101)
LIN signals
- Alternator interface via drive LIN (LIN C1)
CAN input signals
Instrument cluster (A1)
- Fuel reserve signal
- Vehicle speed
Supplemental restraint system control unit (N2/10)
- Crash signal
- Driver seat belt applied
- Engine hood closed (for code (U60) Pedestrian protection)
Front SAM control unit with fuse and relay module (N10/1)
- Engine stop prohibition
- Engine start request
- Energy condition of on-board electrical system
- Status of reverse gear (for a manual transmission)
- Outside air temperature
Rear SAM control unit with fuse and relay module (N10/2)
- Engine hood closed (except code (U60) Pedestrian protection)
Electronic selector lever module control unit (N15/5) (for A/T)
- Selector lever position
Automatic air conditioning control and operating unit (N22/7)
- Specified fan speed request
- Engine torque request
- A/C status
- Engine start request
- Engine stop prohibition
Fuel system control unit (N118)
- Fuel pressure
- Self-diagnosis data
- Requested diagnostic data
Electronic Stability Program control unit (N30/4)
- Wheel speed signal
- Brake recognition
- Cruise control request
- Engine start request
- Engine stop prohibition
- Engine torque, increase request
- Engine torque, reduce request
Left door door control unit (N69/1)
- Driver door closed
Upper control panel control unit (N72/1)
- Status button for ECO start/stop function (N72/1s50) (with code (B03) ECO start/stop function
Steering column tube module control unit (N80)
- Steering wheel angle
Electronic ignition lock control unit (N73)
- "Circuit 15 ON" signal
- Start enable (drive authorization system)
Transmission oil auxiliary pump control unit (N89) (for A/T with code (B03) ECO start/stop function)
- Status of electric motor for electric transmission oil pump
Fully integrated transmission control (VGS) controller unit (Y3/8) (for A/T)
- 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
- Transmission limp-home mode
CAN output signals
Instrument cluster (A1)
- 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))
- Readiness to operate of the ECO start stop function (symbol "ECO" in the multifunction display (A1p13))
Electronic ignition lock control unit (N73)
- Start enable request (drive authorization system)
Fuel system control unit (N118)
- Fuel pump ON
- Fuel requirements
- Diagnosis request
Fully integrated transmission control (VGS) controller unit (Y3/8) (for A/T)
- Shift request
- Engine torque
- Engine coolant temperature
- Engine speed
- Engine load
- Kickdown
- Engine speed limitation active
- Engine control limp-home mode
For an A/T with ECO start/stop function the electrical transmission oil pump is actuated by the transmission oil auxiliary pump control unit for a stopped engine. To do this the transmission oil auxiliary pump control unit receives a request via the drive train CAN (CAN C) from the fully integrated transmission 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.
Ground connection
The "circuit 31" ground connection is made via several ground lines to the left major assembly compartment electronics ground point (W16/5).
Power supply
The ME-SFI [ME] control unit is supplied with power by "terminal 30 fused".
When the ignition is switched on, the electronic ignition lock control unit switches on the circuit 15 relay via the chassis CAN (CAN E). The circuit 15 relay conducts the electrical system voltage from "circuit 30" to "circuit 15".
If a voltage is present on the ME-SFI [ME] control unit at "circuit 15", engine circuit 87 relay is actuated by means of a ground signal. This causes the circuit 87 engine relay to close its power contact and the voltage from "terminal 30" is led according to the respective fuses, as "circuit 87 M1.2/2.2" to the ME-SFI [ME] control unit and as "circuit 87 M1.1/1.2/2.2" to the respective engine control sensors and actuators of the engine timing.
If a voltage is present at "circuit 87 M1.2", the engine control is switched on and an output stage driver in the ME-SFI [ME] control unit takes over actuation of the engine circuit 87 relay.
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.
No-load current shutoff
Information for partial function "no-load current shutoff" is documented in the function description "Energy management engine OFF function".
Variants
The engine control 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.
