GF07.61-P-6000MAR ME-SFI [ME] Control Unit, Component Description

GF07.61-P-6000MAR ME-SFI [ME] Control Unit, Component Description
- refinement package
- as of model year 09

Component Identification:

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

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 87M1
- Knock sensor 1, on the right (A16/1)
- Knock sensor 2, on the 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)
- 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 (intake manifold air pressure) (B28)
- 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)
- Left O2 sensor, downstream of CAT (G3/5) (voltage-jump oxygen sensor)
- Right O2 sensor, downstream of CAT (G3/6) (voltage-jump 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 the restraint system control unit (N2/7)
- Oil level indicator 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 ground for potentiometer 1
- Accelerator pedal sensor - reference ground for potentiometer 2
- LH O2 sensor upstream of CAT - sensor heater
- RH O2 sensor upstream of CAT - sensor heater
- Left O2 sensor downstream of CAT - sensor heater
- RH O2 sensor downstream of CAT - sensor heater
- Engine and air conditioning electric suction fan with integrated control (M4/7) - specified speed of the fan
- Front throttle valve actuator - 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) -
- Terminal 15 relay (K40/2kB)
- Engine electronics and chassis relay (K40/4kK)
- Starter relay (K40/4kL)
- Air pump relay (K40/4kO) Fuel pump relay (K40/5kT)
- Engine oil additional fan relay (K25)
- Fuel pump control unit (N118)
- "specified fuel pressure" PWM signal
- Two-disk 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)
- 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) (with 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)
- TNA signal (engine speed signal)

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

AAC [KLA] control and operating unit (N22)
- Specified fan speed request
- Engine torque request

ESP, SPS [PML] and BAS control unit (N47-5)
- Vehicle speed
- Wheel speed signal
- Brake recognition
- Cruise control request
- Engine torque request

EIS control unit (N73)
- Start enable (drive authorization system)

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

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))

EIS control unit (N73)
- Start enable request (drive authorization system)

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 M1" .
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 from the electronic ground (LH footwell) (W34/1).

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.
It can however take a number of minutes due to various function (such as OBD, DAS 3, 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 variant of the engine control, such as national and exhaust variants, are activated with the DAS over variant coding. Replacement of the ME-SFI [ME] control unit is not necessary.