Component description for ME-SFI [ME] control unit - GF07.61-P-6000MI
ENGINE 272.9 (except 272.98) in MODEL 204.0/2 as of model year 2009/YoM 08
View of the engine compartment from the front (shown on model 212)
Location
The ME-SFI [ME] control unit is located in the middle on the variable intake manifold.
Task
The ME-SFI [ME] control unit represents the engine control, when connected electrically with the sensors and actuators of engine 272 KE (K anal-E inspritzung (port injection)).
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 and tumble flap switchover
- Heat management
- Torque interface
- Alternator interface
- Emission control
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
- Terminal 15
- Circuit 30 (fused)
- Circuit 31
- Circuit 87M1
- RH knock sensor (A16/1)
- LH knock sensor (A16/2)
- Hot film mass air flow sensor (B2/5)
- Intake air temperature sensor (B2/5b1)
- Fuel tank pressure sensor (B4/3) (with code (494) USA version)
- LH intake camshaft Hall sensor (B6/4)
- RH intake camshaft Hall sensor (B6/5)
- LH exhaust camshaft Hall sensor (B6/6)
- RH exhaust camshaft Hall sensor (B6/7)
- Coolant temperature sensor (B11/4)
- Pressure sensor (intake manifold air pressure) (B28)
- Position sensor for left intake manifold tumble flap (B28/9)
- Position sensor for right intake manifold tumble flap (B28/10)
- 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) (non-linear oxygen sensor)
- RH oxygen 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 supplemental restraint system control unit (N2/10)
- Clutch pedal switch (S40/3) (for manual transmission)
- Start enable clutch pedal switch (S40/5) (for manual transmission and code (494) USA version)
- Oil level check switch (S43)
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
- 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 combustion engine and air conditioning system with integrated control (M4/7) - specified fan speed
- Throttle valve - actuator motor (M16/6m1) (Plus)
- Throttle valve - actuator motor (M16/6m1) (Minus)
- Circuit 50 starter relay (N10/1kM)
- Engine circuit 87 relay (N10/1kN)
- Secondary air injection relay (N10/1kP)
- Fuel pump control unit (N118) - fuel pump ON ground 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)
- Heating system shutoff valve (Y16/2)
- Intake manifold switchover valve (Y22/6)
- Intake manifold tumble flap switchover valve (Y22/9)
- Air pump switchover valve (Y32)
- LH intake camshaft solenoid (Y49/4)
- RH intake camshaft solenoid (Y49/5)
- LH exhaust camshaft solenoid (Y49/6)
- RH exhaust camshaft solenoid (Y49/7)
- Purge control 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)
- Coolant thermostat (Y110)
LIN signals
- Alternator interface via drive LIN (LIN C1)
CAN input signals
Instrument cluster (A1)
- Fuel reserve signal
Supplemental restraint system control unit (N2/10)
- Crash signal
Automatic air conditioning control and operating unit (N22/7)
- Specified fan speed request
- Air conditioning status
Electronic Stability Program control unit (N30/4) (except code (233) DISTRONIC PLUS) or 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
Radar sensors control unit (N62/1) with code (233) Distronic Plus)
- Engine torque request
Electronic ignition lock control unit (N73)
- Start enable (drive authorization system)
Fuel pump control unit (N118)
- Fuel pressure
- Self-diagnosis data
- Requested diagnostic data
Fully integrated transmission controller unit (Y3/8) (for code (427) Automatic 7-speed transmission)
- 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
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))
Electronic ignition switch control unit
- Start enable request (drive authorization system)
Fuel pump control unit
- Fuel pump ON
- Fuel requirements
- Diagnosis request
Fully integrated transmission control unit (for code (427) Automatic 7-speed transmission)
- 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.
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".
It is fitted in the operating voltage range with short-circuit protection as well as reversed polarity protection.
Voltage is supplied through several pins connected in parallel to relieve the electrical connectors.
Ground connection
The "circuit 31" ground connection takes place through several ground lines to the LH electronic assembly compartment ground point (W16/5).
Computer run-on
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).
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 (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 | Engine plug model 204 | PE07.61-P-2101-97FAC | |
| Wiring diagram for ME-SFI [ME] gasoline injection and ignition system control unit | N3/10 | Vehicle plug model 204 | PE07.61-P-2101-97FAD |