ME-SFI [ME] control unit, component description - GF07.61-P-6000MAS
ENGINE 156.984 in MODEL 216.377, 221.077 /177 as of Model Year 09 /AEJ 08
View of the engine compartment at the rear left
Location
The ME-SFI [ME] control unit is located at the rear left in the engine compartment.
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 87M4
- 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)
- Air pump relay (N10/1kA)
- Terminal 87 relay, engine (N10/1kC)
- Terminal 15 relay (N10/1kD)
- Circuit 50 relay, starter (N10/1kH)
- Circulation pump relay (N10/2kQ)
- Fuel pump control unit (N118) "fuel pump ON" ground signal
- Fuel pump control unit - pulse width modulated signal (PWM signal) "specified fuel pressure"
- 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) (for 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
AAC [KLA] control unit (N22/1)
- Specified fan speed request
- Engine torque request
EIS control unit (N73)
- Start enable (drive authorization system)
Fuel pump control unit (N118)
- Fuel supply status
- Self-diagnosis data
- Requested diagnostic data
CAN output signals
Instrument cluster (A1)
- 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 (N73)
- Start query (drive authorization system)
Fuel pump control unit (N118)
- Diagnosis requests
Electric controller unit (VGS) (Y3/8)
- 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 M4".
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 "tml. 31" ground connection consists of several ground lines to the electronic ground (LH footwell) (W34/1).
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 (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 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 (sheet 1) model 216 | PE07.61-P-2101-99CAF | |
| N3/10 | Engine connector (sheet 2) model 216 | PE07.61-P-2101-99CAE | ||
| N3/10 | Vehicle connector (sheet 1) model 221 | PE07.61-P-2101-99SAH | ||
| N3/10 | Engine connector (sheet 2) model 221 | PE07.61-P-2101-99SAG |