Component description for ME-SFI (ME) control unit - GF07.61-P-6000MMH
ENGINE 276.9 in MODEL 251.0/1
View of the engine from the front
Location
The ME-SFI [ME] control unit is located on the left on engine.
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
- EGR and exhaust treatment (with NOx catalytic converter) (for code (920) Gasoline direct injection with stratified charge)
- Diagnosis and fault storage
- Injection control
- Electronic accelerator
- Drive authorization system and immobilizer
- Regulated camshaft adjustment
- Fuel supply
- Torque interface
- Alternator interface
- Intake manifold switchover
- 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 (LIN C1)
- Engine compartment CAN (CAN C)
- Drive train sensor CAN (CAN I)
The central gateway control unit (N93) is the central interface (Gateway) for exchange of function-relevant data for control units which are connected to the various Control Area Network (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) | - | - |
| Hot film mass air flow sensor (B2/5) | - | for code (920) gasoline direct injection with stratified charge |
| Intake air temperature sensor (B2/5b1) | - | for code (920) gasoline direct injection with stratified charge |
| 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) | - | - |
| Temperature sensor upstream of RH NOx storage catalytic converter (B16) | - | for code (920) gasoline direct injection with stratified charge |
| Temperature sensor upstream of LG NOx storage catalytic converter (B161) | - | for code (920) gasoline direct injection with stratified charge |
| Intake air temperature sensor (B17) | - | except code (920) Gasoline direct injection with stratified charge |
| Intake manifold intake air temperature sensor (B17/1) | - | - |
| Pressure sensor downstream of throttle valve actuator (B28/7) | - | - |
| Accelerator pedal sensor (B37) | 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) | - |
| - | Starter relay (F58kI) | - |
| - | Engine circuit 87 relay (F58kD) | - |
| Circuit 15 relay (F58kH) | - | - |
| - | Engine and air conditioning electric suction fan with integrated control (M4/7) | - |
| Throttle valve actuator (M16/6) | Throttle valve actuator (M16/6) | - |
| Exhaust gas recirculation actuator motors (M16/45) | Exhaust gas recirculation actuator motors (M16/45) | for code (920) gasoline direct injection with stratified charge |
| Restraint systems control unit (N2/7) | - | - |
| Oil level check switch (S43) | - | - |
| - | Fuel system control unit (N118) | - |
| - | 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) | - |
| - | Intake manifold resonance flap switchover valve (Y77/2) | - |
| - | Intake manifold selector drum switchover valve (Y77/3) | - |
| - | Quantity control valve (Y94) | - |
| - | 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) | - | - |
| Radiator sensor for engine diagnosis (B11/15) | Radiator sensor for engine diagnosis (B11/15) | for code (494) USA version and for code (917) Partial zero emission vehicle emission USA |
| 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) (without code (581) Comfort automatic air conditioning) or C-AAC control and operating unit (for code (581) C-AAC) | - | 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 |
|---|---|---|
| Left NOx sensor control unit (N37/5) | Left NOx sensor control unit (N37/5) | for code (920) gasoline direct injection with stratified charge |
| Right NOx sensor control unit (N37/6) | Right NOx sensor control unit (N37/6) | for code (920) gasoline direct injection with stratified charge |
| 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.
Voltage is supplied through several pins switched in parallel to relieve the connectors.
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 | ||
| Hot film mass air flow sensor (B2/5) (with code (920) Gasoline direct injection with stratified charge) | ||||
| Model | Hot film sensor | |||
| Operating voltage | V | 7.5 - 14 | ||
| Pull up resistor | 1.2 | For 5 V | ||
| ____kΩ | ||||
| Frequency for: 0 kg/h | Hz | <1950 | ||
| 75 kg/hour | Hz | 2736 | ||
| 160 kg/hour | Hz | 3387 | ||
| 310 kg/hour | Hz | 4484 | ||
| 640 kg/hour | Hz | 7832 | ||
| Accuracy | % | ±2 | For 15 - 640 kg and 20°C | |
| Cycle duration | ms | 52.4288 | ||
| Duty cycle | % | 10 | Low | |
| Intake air temperature sensor (B2/5b1) (for code (920) Gasoline direct injection with stratified charge) | ||||
| Model | NTC resistor (stands for Negative Temperature Coefficient (NTC thermistor)) | |||
| Pull up resistor | 2.15 | For 5 V | ||
| ____kΩ | ||||
| Resistance at: -40°C | 39.65 | |||
| 0°C | ____kΩ | 5.489 | ||
| 40°C | 1.166 | |||
| 100°C | ____kΩ | 0.1973 | ||
| 130°C | 0.0971 | |||
| ____kΩ | ||||
| ____kΩ | ||||
| ____kΩ | ||||
| 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: 20°C | Ω | 3117 | ||
| 40°C | Ω | 1332 | ||
| 60°C | Ω | 628 | ||
| 80°C | Ω | 320 | ||
| 100°C | Ω | 175 | ||
| 120°C | Ω | 101 | ||
| Special features | Arbitrary polarity | |||
| Cooler sensor for engine diagnosis (B11/15) (with code (494) USA version and code (917) Partial zero emission vehicle emission USA) | ||||
| Model | ||||
| Supply voltage | V | 12 | Circuit 87 | |
| Interface transfer rate: Maximum | kbit/s | 20 | Communication with the ME-SFI [ME] control unit via the drive train LIN | |
| Special features | 3-pin connector | |||
| Temperature sensor upstream of right NOx storage catalytic converter(B16) (for code (920) Gasoline direct injection with stratified charge), Temperature sensor upstream of left NOx storage catalytic converter (B16/1) (for code (920) Gasoline direct injection with stratified charge) | ||||
| Model | PTC resistance (stands for Positive Temperature Coefficient (PTC thermistor)) | |||
| Supply voltage | V | 5.0 | ±0.1% | |
| Series resistor | 1 | ±0.1% | ||
| ____kΩ | ||||
| Operating current | mA | 2.7 | Minimum | |
| mA | 4.2 | Maximum | ||
| Resistance at: 100°C | Ω | 276 | ||
| 600°C | Ω | 617 | ||
| 700°C | Ω | 679 | ||
| 1000°C | Ω | 849 | ||
| Operating temperature (exhaust temperature) | °C | -40 - 850 | ||
| Special features | Arbitrary polarity | |||
| Intake air temperature sensor (B17) (except code (920) Gasoline direct injection with stratified charge), Intake manifold intake air temperature sensor (B17/1) |
||||
| Model | NTC resistor (stands for Negative Temperature Coefficient (NTC thermistor)) | |||
| Supply voltage | V | 5.0 | ±5% | |
| Series resistor | 3.16 | ±1% | ||
| ____kΩ | ||||
| Resistance: -20°C | Ω | 97.120 | ||
| 0°C | Ω | 32.660 | ||
| 20°C | Ω | 12.490 | ||
| 40°C | Ω | 5325 | ||
| 60°C | Ω | 2490 | ||
| Special features | 2-pin connector | |||
| Pressure sensor downstream of throttle valve actuator (B28/7) | ||||
| Model | Pressure sensor | |||
| Supply voltage | V | 5.0 | ±0.25 V | |
| 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 | Two Hall sensors | |||
| Supply voltage | V | 5.0 | ±0.5 V | |
| Power consumption | mA | 8.5 | ±2.5 mA | |
| 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 V | |
| 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 mm | |
| 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 (G3/5) 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 | |
| Quiescent current | mA | 0.3 | ||
| Average operating current | A | 50 | ±2 A | |
| EGR actuator motors (M16/45) (for code (920) Gasoline direct injection with stratified charge) | ||||
| Model | Actuator motor | |||
| Supply voltage of the actuator motor | V | 12.0 | ||
| Actuator motor power consumption | A | < 1.4 | Operation | |
| A | 4.0 | Maximum | ||
| Actuator motor resistance | Ω | 2.6 | ± 0.3 Ω | |
| Actuator motor inductivity | mH | 14.5 | ± 3.0 mH | |
| PWM signal (actuation) for the actuator motor | Hz | 1000 | ||
| Supply voltage for the Hall sensor | V | 5.0 | ±0.1 V | |
| Maximum power consumption of the Hall sensor | mA | 6.5 | ||
| Special features | Polarity of the actuator motor reversible | |||
| 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 Ω | 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 mm | |
| 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 Ω | At 20°C |
| Fuel injector for cylinder 1 to 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 | ||
| ____kΩ | ||||
| Fuel pressure on injector | bar | approx. 200 | ||
| Special features | 2-pin connector, Pin 1 (+), Pin 2 (-) | |||
| 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) | |||
| 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, engine-side, Specification 1 | PE07.08-P-2101-97RAA | |
| N3/10, engine-side, Specification 2 | PE07.08-P-2101-97RAB | ||
| N3/10, body-side | PE07.08-P-2101-97RAC |