Component description for ME-SFI (ME) control unit - GF07.61-P-6000MMN
ENGINE 276.8 in MODEL 251.1
View of the engine from above
Location
The ME-SFI [ME] control unit is located at the top on the engine above the charge air manifold.
Task
The ME-SFI control unit fulfills the following tasks:
- Controlling the basic engine functions
- Reading in of sensors and signals
- Evaluation of input factors
- Output of signals and actuation of components
The ME-SFI [ME] control unit also acts as the interface (gateway) between the connected CAN bus systems.
Controlling the basic engine functions
- Exhaust treatment
- Charging
- Diagnosis and fault storage
- Injection control
- Electronic accelerator
- Drive authorization system and immobilizer
- Alternator interface
- Regulated camshaft adjustment
- Fuel supply
- Torque interface
- Thermal management
- Ignition system
Reading in of sensors and signals
Input factors are read in by means of the following connections:
- Direct line
- Drive train LIN (LIN C1)
- Engine compartment CAN (CAN C)
- Drive train sensor CAN (CAN I)
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.
Output of signals and actuation of components
Initial parameter are output over the following connections:
- Direct line
- Drive train LIN
- Engine compartment CAN
- Drive train sensor CAN
The central gateway control unit (N93) is the central interface (gateway) for exchanging function-relevant data of the control units that are connected to the various CAN bus systems.
Input factors and initial parameters for the following components are read in or output over direct lines by the ME-SFI [ME] control unit and are needed by the engine timing:
| Input factors over the direct line | Initial parameters over the direct line | Supplemental information |
|---|---|---|
| Circuit 15 | - | - |
| Circuit 30 (fused) | - | - |
| Circuit 31 | - | - |
| Circuit 87M4 | - | - |
| Knock sensor 1, on the right (A16/1) | - | - |
| Knock sensor 2, on the left (A16/2) | - | - |
| Fuel pressure and temperature sensor (B4/25) | - | - |
| 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) | - | - |
| Charge air temperature sensor (B17/8) | - | - |
| Left pressure sensor downstream of cylinder bank air filter (B28/1) | - | - |
| Right pressure sensor downstream of cylinder bank air filter (B28/2) | - | - |
| Pressure sensor upstream of throttle valve (B28/6) | - | - |
| Pressure sensor downstream of throttle valve actuator (B28/7) | - | - |
| Accelerator pedal sensor (B37) | - | - |
| Crankshaft Hall sensor (B70) | - | - |
| O2 left sensor upstream of CAT (G3/3) | O2 left sensor upstream of CAT (G3/3) | - |
| O2 right sensor upstream of CAT (G3/4) | O2 right sensor upstream of CAT (G3/4) | - |
| O2 left sensor downstream of CAT (G3/5) | O2 left sensor downstream of CAT (G3/5) | - |
| O2 right sensor downstream of CAT (G3/6) | O2 right sensor downstream of CAT (G3/6) | - |
| - | Engine circuit 87 relay (F58kD) | - |
| Circuit 15 relay (F58kH) | - | - |
| - | Starter relay (F58kI) | - |
| - | Engine and air conditioning electric suction fan with integrated control (M4/7) | - |
| Throttle valve actuator (M16/6) | Throttle valve actuator (M16/6) | - |
| Restraint systems control unit (N2/7) | - | - |
| - | Fuel system control unit (N118) | - |
| Oil level check switch (S43) | - | - |
| - | 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) | - |
| - | Left intake camshaft solenoid (Y49/4) | - |
| - | Right intake camshaft solenoid (Y49/5) | - |
| - | Left exhaust camshaft solenoid (Y49/6) | - |
| - | Right exhaust camshaft solenoid (Y49/7) | - |
| - | Purging switchover valve (Y58/1) | - |
| - | Cylinder 1 fuel injector (Y76/1) | - |
| - | Cylinder 2 fuel injector (Y76/2) | - |
| - | Cylinder 3 fuel injector (Y76/3) | - |
| - | Cylinder 4 fuel injector (Y76/4) | - |
| - | Cylinder 5 fuel injector (Y76/5) | - |
| - | Cylinder 6 fuel injector (Y76/6) | - |
| - | Boost pressure control pressure transducer (Y77/4) | - |
| - | Quantity control valve (Y94) | - |
| - | Left bypass air switchover valve (Y101/1) | - |
| - | Right bypass air switchover valve (Y101/2) | - |
| - | Engine oil pump valve (Y130) | - |
Input factors and initial parameters for the following components and control units are transmitted or received over the LIN or CAN by the ME-SFI [ME] control unit and are required by the engine timing:
| Input factors via the drive train LIN (LIN C1) | Initial parameters via the drive train LIN (LIN C1) | Supplemental information |
|---|---|---|
| Alternator (G2) | Alternator (G2) | - |
| Input factors via engine compartment CAN (CAN C) | Initial parameters via engine compartment-CAN (CAN C) | Supplemental information |
|---|---|---|
| Instrument cluster (A1) | Instrument cluster (A1) | - |
| Restraint systems control unit (N2/7) | - | - |
| Front SAM control unit (N10) | - | via interior CAN (CAN B) and central gateway control unit (N93) |
| AAC [KLA] control and operating unit (N22) (except code (581) Comfort automatic air conditioning) or C-AAC control and operating unit (N22/7) (with code (581) Comfort automatic air conditioning) | - | via interior CAN (CAN B) and central gateway control unit (N93) |
| ESP control unit (N47-5) | - | - |
| EZS control unit (N73) | EZS control unit (N73) | - |
| Electric controller unit (VGS) (Y3/8) | Electric controller unit (VGS) (Y3/8) | - |
| Data link connector (X11/4) | Data link connector (X11/4) | via diagnostic CAN (CAN D), interior CAN (CAN B) and central gateway (N93) |
| Input factors via drive train sensor CAN (CAN I) | Initial parameters via drive train sensor CAN (CAN I) | Supplemental information |
|---|---|---|
| Fuel system control unit (N118) | Fuel system control unit (N118) | - |
Body
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 dust.
The housing contains the 32-bit measuring and control electronics for the engine timing.
Power supply
The ME-SFI [ME] control unit is "circuit 30 fused" and also supplied with a voltage for ignition ON by "circuit 87 M4".
In the operating voltage range it has both short-circuit protection and reversed polarity protection.
Power is supplied through several connectors connected in parallel to relieve the electrical connections.
Ground connection
The ground connection "Circuit 31" occurs via a number of ground lines to the left major assembly compartment ground, power ground (W16/3).
Variants
The engine timing 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.
| Designation | Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| ME-SFI [ME] control unit (N3/10) | ||||
| Power supply | V | 12.0 | ||
| Voltage limit: Minimum Maximum | V | 8.0 | ||
| V | 19.0 | |||
| Power consumption: No-load current | μA | 1000 | Maximum | |
| μA | 700 | Typical | ||
| Reverse polarity protection | Yes | |||
| Additional specific parameters | No | |||
| Flash capability/coding capability | Yes/yes | |||
| Knock sensor 1, on the right (A16/1), Knock sensor 2, on the left (A16/2) | ||||
| Model | Capacitive sensor (piezo crystal) | |||
| Capacitance | pF | 1050 | ±23.8 % | |
| Sensitivity | mV/g | 26 | ±30.8% | |
| Resistor | MΩ | >10 | ||
| Linearity | kHz | 3 - 20 | ||
| Operating temperature | °C | -40 - 150 | ||
| Fuel pressure and temperature sensor (B4/25) | ||||
| Model | Combined pressure and temperature sensor | |||
| Supply voltage | V | 5.0 | ±5% | |
| Power consumption | mA | 15 | Maximum | |
| Operating pressure | MPa | 28 | Maximum | |
| Bursting pressure | MPa | 250 | ||
| Pressure measuring range | MPa | 0 - 30 | ||
| Temperature measurement range | °C | -40 - 140 | ||
| Ambient temperature | °C | -40 - 130 | ||
| Series resistor | 3 | |||
| ____kΩ | ||||
| Resistor | 30 | at 25°C | ||
| ____kΩ | ||||
| Special features | 4-pin connector | |||
| 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) |
||||
| Model | Hall sensor | |||
| Supply voltage: circuit 87 M1 circuit 87 M3 | V | 4.7 - 18 | B6/5, B6/7 | |
| V | 4.7 - 18 | B6/4, B6/6 | ||
| Maximum power consumption | mA | 10 | ||
| Output voltage | V | 0 - 18 | ||
| Output current | mA | 0 - 20 | ||
| Coolant temperature sensor (B11/4) | ||||
| Model | NTC resistor (stands for Negative Temperature Coefficient (NTC thermistor)) | |||
| Supply voltage | V | 5.0 | ±5% | |
| Series resistor | Ω | 1470 | ±1% | |
| Resistance at: | Ω | 3117 | ||
| 20°C | Ω | 1332 | ||
| 40°C | Ω | 628 | ||
| 60°C | Ω | 320 | ||
| 80°C | Ω | 175 | ||
| 100°C | Ω | 101 | ||
| 120°C | ||||
| Special features | Arbitrary polarity | |||
| Charge air temperature sensor (B17/8) | ||||
| Model | NTC resistor (stands for Negative Temperature Coefficient (NTC thermistor)) | |||
| Supply voltage | V | 5.0 | ± 5% | |
| Series resistor | 3.16 | ± 1% | ||
| ____kΩ | ||||
| Resistance: | Ω | 97, 120 | ||
| -20°C | Ω | 32, 660 | ||
| 0°C | Ω | 12, 490 | ||
| 20°C | Ω | 5325 | ||
| 40°C | Ω | 2490 | ||
| 60°C | ||||
| Special features | 2-pin connector | |||
| Left pressure sensor downstream of cylinder bank air filter (B28/1), Right pressure sensor downstream of cylinder bank air filter (B28/2) |
||||
| Model | Pressure sensor | |||
| Supply voltage | V | 5.0 | ± 0.25 | |
| Output voltage | V | 0.1 - 4.9 | For a 5 V supply voltage | |
| Power consumption | mA | 10 | Maximum | |
| Output current | mA | ±1 | ||
| Measuring range | kPa | 7 - 110 | Absolute pressure | |
| Signal plausibility | V | 0.08 - 4.94 | ||
| Operating temperature | °C | -40 - 135 | ||
| Pressure sensor upstream of throttle valve (B28/6) | ||||
| Model | Pressure sensor | |||
| Supply voltage | V | 5.0 | ±0.25 | |
| Output voltage | V | 0.5 - 4.5 | For a 5 V supply voltage | |
| Power consumption | mA | 10 | Maximum | |
| Output current | mA | ±1 | ||
| Measuring range | kPa | 10 - 125 | Absolute pressure | |
| Signal plausibility | V | 0.10 - 4.94 | ||
| Operating temperature | °C | -40 - 125 | ||
| Pressure sensor downstream of throttle valve actuator (B28/7) | ||||
| Model | Pressure sensor | |||
| Supply voltage | V | 5.0 | ±0.25 | |
| Output voltage | V | 0.3 - 4.7 | For a 5 V supply voltage | |
| Power consumption | mA | 10 | Maximum | |
| Output current | mA | ±1 | ||
| Measuring range | kPa | 10 - 250 | Absolute pressure | |
| Signal plausibility | V | 0.10 - 4.94 | ||
| Operating temperature | °C | - 40 - 135 | ||
| Accelerator pedal sensor (B37) | ||||
| Model | 2 Hall sensors | |||
| Supply voltage | V | 5.0 | ±0.5 | |
| Power consumption | mA | 8.5 | ±2.5 | |
| Signal current | μA | ≤50 | ||
| Linearity | % | ± 1 | Both sensors | |
| Temperature range | °C | - 40 - 80 | ||
| Special features | Direct contacting over a 6-pin connector | |||
| Crankshaft Hall sensor (B70) | ||||
| Model | Hall sensor | |||
| Supply voltage | V | 5.0 | ± 0.25 | |
| Power consumption | mA | 12 | Maximum of 15 mA | |
| Output voltage | V | 0 - 5.25 | ||
| Output current | mA | ≤0.25 | ||
| Distance to increment wheel | mm | 0.8 | ± 0.5 | |
| Special features | dependent in the direction of rotation | |||
| Alternator (G2) | ||||
| Model | A/C alternator with integral rectification | |||
| Interface transfer rate: Maximum | kbit/s | 20 | Communication with the ME-SFI [ME] control unit via the drive train LIN | |
| Special features | Self-diagnosis | |||
| O2 left sensor, upstream of CAT (G3/3), O2 right sensor upstream of CAT (G3/4) | ||||
| Model | Wideband oxygen sensor (LSU 4.9) | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Voltage limit: Minimum Maximum | V | 10.8 | ||
| V | 16.5 | |||
| Medium heating current | mA | 400 | During idle | |
| Internal resistance of the Nernst cell | Ω | 300 | ||
| Power consumption of the Nernst cell | μA | <250 | ||
| Nernst voltage | mV | 450 | ||
| Maximum exhaust temperature | °C | ≤930 | ||
| Frequency | Hz | 100 | ||
| Special features | Potential-free insulated sensor with 6-way connector | |||
| O2 left sensor downstream of CAT (G35) O2 right sensor downstream of CAT (G3/6) |
||||
| Model | Narrow band oxygen sensor (LSF 4.2) | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Sensor voltage | V | approx. 1 | Direction rich mixture | |
| V | approx. 0 | Direction lean mixture | ||
| Frequency | Hz | 10 | ||
| Special features | Potential-free insulated sensor with 4-way connector | |||
| Engine and air conditioning electric suction fan with integrated control (M4/7) | ||||
| Model | Electric suction fan | |||
| Supply voltage | V | 12 | Circuit 87 M2 and circuit 30 | |
| Operating voltage | V | 6 - 18 | ||
| Specified speed of the fan | over a pulse width modulated signal (PWM signal) from the ME-SFI [ME] control unit | |||
| Frequency | Hz | 10 | PWM signal | |
| Duty cycle | % | 0 - 100 | PWM signal | |
| No-load current | mA | 0.3 | ||
| Average operating current | A | 50 | ±2 | |
| Throttle valve actuator (M16/6) | ||||
| Model | Actuator motor with a contact-less angular sensor | |||
| Supply voltage of the actuator motor | V | 12.0 | ||
| Actuator motor power consumption | A | 1.5 - 9.5 | ||
| Supply voltage for potentiometer 1 and 2 | V | 5.0 | ||
| Potentiometer 1 | V | 0.5 | ± 5.6% | Lower mechanical end stop |
| V | 4.65 | ± 5.0% | Upper mechanical end stop | |
| Potentiometer 2 | V | 4.5 | ± 5.6% | Lower mechanical end stop |
| V | 0.35 | ± 5.0% | Upper mechanical end stop | |
| Diameter of throttle valve | mm | 74 | ||
| Operating temperature | °C | -40 - 120 | ||
| Two-disk thermostat heating element (R48) | ||||
| Model | Heating element | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Frequency | Hz | 141 | ||
| Resistor | Ω | 15.3 | ± 1.5 | At 20°C |
| Oil level check switch (S43) | ||||
| Model | Reed contact (normally closed contact) | |||
| Supply voltage | V | 5 | ± 5% | |
| Power consumption | mA | 1 | Minimum | |
| Power consumption | mA | 400 | Maximum (induction free) | |
| Resistor | Ω | ∞ | Minimum oil level not reached | |
| Ω | 0 | Oil level OK | ||
| Shift point | mm | 19.2 | ± 1 | |
| Special features | 2-pin connector, Pin 1 blank | |||
| Ignition coils for cylinders 1 - 6 (T1/1 - T1/6) | ||||
| Supply voltage: circuit 87 M1 circuit 87 M3 | V | 12 | T1/1, T1/2, T1/3 | |
| V | 12 | T1/4, T1/5, T1/6 | ||
| Operating voltage | V | 6 - 19 | ||
| Primary charging current | A | 21 | ||
| Resistance: Primary secondary | Ω | 0.072 | ||
| 1.59 | ||||
| ____kΩ | ||||
| Inductance: Primary secondary | μH | 90 | ||
| H | 2.78 | |||
| Special features | Diagnosis feedback over the current interface | |||
| Left intake camshaft solenoid (Y49/4), Right intake camshaft solenoid (Y49/5), Left exhaust camshaft solenoid (Y49/6), Right exhaust camshaft solenoid (Y49/7) |
||||
| Model | Magnet | |||
| Supply voltage: circuit 87 M1 circuit 87 M3 | V | 12 | Y49/5, Y49/7 | |
| V | 12 | Y49/4, Y49/6 | ||
| Operating voltage | V | 8 - 16 | ||
| Maximum power consumption | A | <3.0 | ||
| Coil resistance | Ω | 7.5 | ± 6.5% | |
| Inductance | mH | 23 | ||
| Frequency | Hz | 150 | PWM signal | |
| Operating temperature | °C | -40 - 130 | ||
| Start position of the intake camshaft | 36° after TDC (T op D ead Center) | |||
| Start position of the exhaust camshaft | 20° before top dead center | |||
| Adjustment range of the intake camshaft | 4° BTDC up to 36° ATDC | |||
| Adjustment range of the exhaust camshaft | 20° BTDC up to 20° after top dead center | |||
| Purging switchover valve (Y58/1) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Operating voltage | V | 9 - 16 | ||
| Power consumption | mA | 0 - 500 | At 20°C | |
| Actuation | % | 0 - 100 | PWM signal | |
| Frequency | Hz | 200 | PWM signal | |
| Coil resistance | Ω | 25.5 | ± 1.5 | At 20°C |
| Fuel injector for cylinder 1 - 6 (Y76/1 - Y76/6) | ||||
| Model | Piezo injectors | |||
| Voltages | V | 80 | Rated voltage (for 20°C) | |
| V | 210 | Maximum voltage | ||
| Current pulse: Open | A | 8 | ||
| Close | A | -8 | ||
| Actuation times: Open | μs | 180 | ||
| Close | μs | 200 | ||
| Loads | mC | 0.21 | Minimum loading | |
| mC | 0.69 | Nominal loading | ||
| Needle lift | μm | 34 | ||
| Flow | mg/ms | 34.5 | For 200 bar and 0.69 mC | |
| Resistor | 220 | ± 10 | ||
| ____kΩ | ||||
| Fuel pressure on injector | bar | approx. 200 | ||
| Special features | 2-pin connector, Pin 1 (+), Pin 2 (-) | |||
| Boost pressure control pressure transducer (Y77/4) | ||||
| Model | Electropneumatic converter | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Operating voltage | V | 10 - 16 | ||
| Power consumption | A | approx. 1 | For 23°C (± 5°C) and 12 V | |
| Duty cycle | % | 100 | ||
| Duty cycle | % | 5 - 95 | For 10 V | |
| Operating frequency | Hz | 300 | PWM signal | |
| Inductance | mH | approx. 15 | For 23°C (± 5°C) | |
| Coil resistance | Ω | 10.5 | ±0.7 | For 23°C (± 5°C) |
| Air consumption | l/h | <35 | ||
| Ambient temperature | °C | -40 - 130 | ||
| Quantity control valve (Y94) | ||||
| Model | Shift valve | |||
| Operating voltage | V | 6 - 16 | ||
| Power consumption | A | approx. 14 | Maximum at 20°C | |
| Effective current | A | < 5 | Maximum at 20°C | |
| Coil resistance | Ω | 0.49 | ± 5% | At 20°C |
| Frequency | kHz | 4 | PWM signal | |
| Actuation | % | 0 - 90 | PWM signal | |
| Power loss (components) | W | 12 | Maximum | |
| Ambient temperature | °C | -40 - 120 | ||
| Special features | Valve safe position (de-energized open) | |||
| Left bypass air switchover valve (Y101/1), right bypass air switchover valve (Y101/2) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Operating voltage | V | 10 - 16 | ||
| Maximum power consumption | A | 2.36 | ± 0.06 A | |
| Total resistance | Ω | 8.9 | ± 0.25 Ω | at 25°C |
| Engine oil pump valve (Y130) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Frequency | Hz | 200 | PWM signal |
| Wiring diagram for gasoline direct injection system control unit | N3/10, body-side | PE07.08-P-2101-97RAC |
| N3/10, engine-side, Specification 1 | PE07.08-P-2101-97RAD | |
| N3/10, engine-side, Specification 2 | PE07.08-P-2101-97RAE |