Component description for ME-SFI (ME) control unit - GF07.61-P-6000MRH
ENGINE 274.9 in MODEL 205.047/147/247
View of engine compartment
Location
The ME-SFI [ME] control unit is located on the left of the engine next to the charge air distributor.
Tasks
The ME-SFI [ME] control unit fulfills the following tasks:
- Controlling the engine basic functions
- Reading in of signals
- Evaluation of input factors
- Output of signals and actuation of components
The ME-SFI [ME] control unit operates in an electrical network of sensors and actuators to form the engine management system for engine 274 Hybrid. As the master control unit it also takes on a large part of the controlling of hybrid systems. The ME-SFI [ME] control unit also acts as an interface (Gateway) between the attached CAN bus systems.
Controlling the engine basic functions
- Ignition ON
- Start
- Ignition OFF
- Fuel supply
- Injection control
- Ignition system
- Synchronization of injection and firing order
- Start, post-start phase and warm-up enrichment
- Engine speed control
- Lambda control
- Smooth running control
- Heat management
- Torque coordination
- Inertia fuel shutoff
- Knock sensor system
- Camshaft adjustment
- Engine limp-home mode
- European On-Board Diagnosis
- Engine management Start-Stop
- Hybrid system function
- Hybrid system energy management function
- Charging
- Driving, function
- Exhaust treatment
- Electronic accelerator
- Recuperative braking, function
- Capturing fueling gases (for code 494 (USA version))
- Purge control
- Purge system with leak test (with CODE 494 (USA version))
Reading in of signals
Input factors are read in over the following connections:
- Direct line
- Drive-LIN (LIN C1)
- Engine CAN (CAN C)
- Drive train CAN (CAN C1)
Evaluation of input factors
The input factors that have been read in are evaluated by the integral microprocessor, and the relevant components are actuated.
Output of signals and actuation of components
Initial parameter are output over the following connections:
- Direct line
- Drive train LIN
- Engine CAN
- Drive train CAN
The electronic ignition lock control unit (N73) 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 management
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Terminal 15 | - | - |
| Circuit 30 (fused) | - | - |
| Circuit 31 | - | - |
| Circuit 87M4 | - | - |
| Knock sensor 1 (A16/1) | - | - |
| Knock sensor 2 (A16/2) | - | - |
| Fuel tank diagnostic module (A101) | Fuel tank diagnostic module (A101) | With CODE 494 (USA version) |
| Fuel pressure and temperature sensor (B4/25) | - | - |
| Purging pressure sensor (B4/4) | - | With CODE 494 (USA version) |
| Fuel tank pressure sensor 1 (B4/48) | With CODE 494 (USA version) | |
| Fuel tank pressure sensor 2 (B4/49) | With CODE 494 (USA version) | |
| Intake camshaft Hall sensor (B6/15) | - | - |
| Exhaust camshaft Hall sensor (B6/16) | - | - |
| Coolant temperature sensor (B11/4) | - | - |
| Charge air temperature sensor upstream of throttle valve (B17/7) | - | - |
| Charge air temperature sensor downstream of throttle valve (B17/9) | - | - |
| Pressure sensor downstream of air filter (B28/11) | - | - |
| Pressure sensor upstream of throttle valve (B28/6) | - | - |
| Pressure sensor downstream of throttle valve (B28/7) | - | - |
| Accelerator pedal sensor (B37) | - | - |
| Crankshaft Hall sensor (B70) | - | - |
| Oxygen sensor downstream of catalytic converter (G3/1) | - | - |
| Oxygen sensor element downstream of catalytic converter (G3/1b1) | - | - |
| - | Oxygen sensor heater downstream of catalytic converter (G3/1r1) | - |
| Oxygen sensor upstream of catalytic converter (G3/2) | - | - |
| Oxygen sensor element upstream of catalytic converter (G3/2b1) | - | - |
| - | Oxygen sensor heater upstream of catalytic converter (G3/2r1) | - |
| Throttle valve actuator (M16/6) | - | - |
| - | Throttle valve actuator motor (M16/6m1) | - |
| Actual value potentiometer 1 (M16/6r1), throttle valve | - | - |
| Actual value potentiometer 2 (M16/6r2), throttle valve | - | - |
| - | Electric coolant pump (M75/11) | Except CODE 494 (USA version) |
| Supplemental Restraint System control unit (N2/10) | - | - |
| Engine compartment circuit 15 relay (K40/8kG) | - | - |
| - | Starter circuit 50 relay (K40/8kH) | - |
| Circuit 87M relay (K40/8kN) | Circuit 87M relay (K40/8kN) | - |
| - | Fuel system control unit (N118) | - |
| - | Wide open throttle operation vent line heater element (R39/2) | - |
| - | Coolant thermostat heating element (R48) | - |
| Oil level check switch (S43) | - | - |
| - | Cylinder 1 ignition coil (T1/1) | - |
| - | Cylinder 2 ignition coil (T1/2) | - |
| - | Cylinder 3 ignition coil (T1/3) | - |
| - | Cylinder 4 ignition coil (T1/4) | - |
| - | Intake camshaft solenoid (Y49/1) | - |
| - | Exhaust camshaft solenoid (Y49/2) | - |
| - | Purging switchover valve (Y58/1) | - |
| - | Partial load operation crankcase ventilation system valve (Y58/2) | - |
| Fuel tank shutoff valve (Y58/5) | With CODE 494 (USA version) | |
| Fuel vapor shutoff valve (Y75/1) | With CODE 494 (USA version) | |
| - | Cylinder 1 fuel injector (Y76/1) | - |
| - | Cylinder 2 fuel injector (Y76/2) | - |
| - | Cylinder 3 fuel injector (Y76/3) | - |
| - | Cylinder 4 fuel injector (Y76/4) | - |
| - | Boost pressure control pressure transducer (Y77/1) | - |
| - | Quantity control valve (Y94) | - |
| - | Deceleration air switchover valve (Y101) | - |
| - | Engine oil pump valve (Y130) | - |
Input parameters and initial parameters for the following components and control units are transmitted or received by the ME-SFI [ME] or CDI control unit via the LIN or CAN and are needed by the engine management system:
| Input factors via the drive-LIN (LIN C1) | Initial parameters via the drive-LIN (LIN C1) | Supplemental information |
|---|---|---|
| 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 over engine CAN (CAN C) | Initial parameters via engine CAN (CAN C) | Supplemental information |
|---|---|---|
| Instrument cluster (A1) | Instrument cluster (A1) | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Supplemental Restraint System control unit (N2/10) | - | Over the user interface CAN (CAN HMI), electronic ignition lock control unit (N73) Suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Front SAM control unit (N10/6) | - | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Left front door control unit (N69/1) | - | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Battery management system control unit (N82/2) | - | Via the HYBRID-CAN (CAN L) and over the powertrain control unit (N127) |
| Powertrain control unit (N127) | Powertrain control unit (N127) | - |
| Power electronics control unit (N129/1) | Power electronics control unit (N129/1) | Via the HYBRID-CAN (CAN L) and over the powertrain control unit (N127) |
| Diagnostic connector (X11/4) | Diagnostic connector (X11/4) | Via diagnostic CAN (CAN D), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Input factors via drive train CAN (CAN C1) | Initial parameters via drive train CAN (CAN C1) | Supplemental information |
|---|---|---|
| Instrument cluster (A1) | Instrument cluster (A1) | Via user interface-CAN (CAN HMI), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Climate control unit (N22/1) | - | Over the interior CAN (CAN B), electronic ignition lock control unit (N73), suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Electronic Stability Program control unit (N30/4) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| AIRmatic control unit (N51/3) (for code 483 (ADVANCED AGILITY-package) and for code 489 (AIRMATIC)) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Radar sensors control unit (N62/1) (with CODE 23P (Driving assistance package Plus)) | - | Via suspension FlexRay (Flex E), Electronic Stability Program control unit (N30/4) and powertrain control unit (N127) |
| Steering column tube module control unit (N80) | - | Via suspension FlexRay (Flex E) and powertrain control unit (N127) |
| Fuel system control unit (N118) | Fuel system control unit (N118) | - |
| Powertrain control unit (N127) | Powertrain control unit (N127) | - |
| Fully integrated transmission control unit (Y3/8n4) | Fully integrated transmission control unit (Y3/8n4) | - |
Body
The ME-SFI [ME] control unit housing is made out of diecast aluminum and the cover is made out corrosion-protected sheet steel. The ME-SFI [ME] control unit is water and dust protected.
The inside contains the 32-bit measuring and control electronics for the engine management.
Voltage supply
The ME-SFI [ME] control unit is supplied with a voltage from "circuit 30 secured" and also for ignition ON from "circuit 87 M4".
In the operating voltage range it has both short-circuit protection and reversed polarity protection.
Power is supplied through several engaged parallel pins connected in parallel to relieve the electrical connections.
Ground connection
The "circuit 31" ground connection is made via several ground lines to the left major assembly compartment electronics ground point (W16/5).
Information for partial function "no-load current shutoff" is documented in the function description "Engine OFF energy management function".
Variants
The variants of the engine management, for exampled country and exhaust variants, are activated with XD over the variant coding. Exchange of the ME-SFI [ME] control unit is not necessary.
| Designation | Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| ME-SFI [ME] control unit (N3/10) | ||||
| Voltage supply | V | 12.0 | ||
| Pole reverse protection | Yes | |||
| Additional specific parameters | No | |||
| Flash ability/codablity | Yes/yes | |||
| Special features | No | |||
| Knock sensor 1 (A16/1) Knock sensor 2 (A16/2) |
||||
| Model | Capacitive sensor (piezo-crystal) | |||
| Capacity | pF | 1050 | ±250 | |
| Resistor | MΩ | > 10 | ||
| Fuel tank diagnostic module (A101) (with CODE 494 (USA version)) | ||||
| Model | Diagnostic module with integral air pump and switchover valve | |||
| Supply voltage | V | 12 | ||
| Fuel pressure and temperature sensor (B4/25) | ||||
| Model | Combined pressure and temperature sensor | |||
| Supply voltage | V | 5.0 | ±5 % | |
| Power consumption | mA | 12 | Maximum | |
| mA | 15 | |||
| Pressure measurement range | MPa | 0...28 | ||
| Operating pressure | MPa | 34 | Maximum | |
| Bursting pressure | MPa | 260 | ||
| Temperature measurement range | °C | -40...140 | ||
| Resistor | _____________ kΩ | 10 | At 25°C | |
| Special features | 4-pin electrical connection | |||
| Fuel tank pressure sensor 1 (B4/48) and fuel tank pressure sensor 2 (B4/49) (for code 494 (USA version)) | ||||
| Model | Pressure sensor | |||
| Supply voltage | V | 5.0 | 5 ± % | |
| Intake camshaft Hall sensor (B6/15), Exhaust camshaft Hall sensor (B6/16) | ||||
| Model | Hall sensor | |||
| Supply voltage | V | 4.7...18 | ||
| Maximum power consumption | mA | < 20 | ||
| Distance to sensor | mm | 0.2...1.8 | ||
| Coolant temperature sensor (B11/4) | ||||
| Model | NTC resistor N egative T emperature C oefficient (NTC thermistor) | |||
| Signal plausibility | V | 0.1...4.9 | ||
| Series resistor | Ω | 1470 | ±1% | |
| Resistance at: 20°C | Ω | 3117 | ||
| 40°C | Ω | 1338 | ||
| 60°C | Ω | 631 | ||
| 80°C | Ω | 322 | ||
| 100°C | Ω | 175 | ||
| 120°C | Ω | 101 | ||
| Special features | Polarity as one wishes | |||
| Charge air temperature sensor upstream of throttle valve (B17/7), Charge air temperature sensor downstream of throttle valve (B17/9) |
||||
| Model | NTC resistor | |||
| Supply voltage | V | 5.0 | ||
| Special features | Polarity as one wishes | |||
| Pressure sensor downstream of air filter (B28/11) | ||||
| Model | Pressure sensor | |||
| Supply voltage | V | 5.0 | ± 0.25 V | |
| Output voltage | V | 0.1...4.9 | For a 5 V supply voltage | |
| Power consumption | mA | 10 | Maximum | |
| 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), pressure sensor downstream of throttle valve (B28/7) | ||||
| Model | Pressure sensor | |||
| Supply voltage | V | 5.0 | ± 0.25 V | |
| Output voltage | V | 0.3...4.7 | For 5V supply voltage | |
| Power consumption | mA | 10 | Maximum | |
| 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 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 electrical connection | |||
| 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 | ||
| Space to sensor rotor | mm | 0.8 | ± 0.5 mm | |
| Special features | Dependent on direction of rotation | |||
| Oxygen sensor downstream of catalytic converter (G3/1) consisting of: Oxygen sensor element downstream of catalytic converter (G3/1b1), Oxygen sensor heater downstream of catalytic converter (G3/1r1) |
||||
| Model | Narrow band oxygen sensor (LSF 4.71) | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Average heater current | mA | 400 | In idle | |
| Internal resistance | Ω | 200...250 | ||
| Pump current | μA | 20...25 | Center value | |
| μA | 800 | Maximum value | ||
| Pump cycle duration | ms | 400 | ||
| Sensor voltage for: T = 350°C λ = 0.97 | mV | >800 | Dependent on exhaust temperature (T) | |
| T = 350°C λ = 1.03 | mV | 100...200 | ||
| Sensor voltage for: T = 850°C λ = 0.97 | mV | > 680 | Dependent on exhaust temperature (T) | |
| T = 850°C λ = 1.03 | mV | 40...100 | ||
| Special features | Potential - free insulated probe with 4-type coupling | |||
| Oxygen sensor upstream of catalytic converter (G3/2) consisting of: Oxygen sensor element upstream of catalytic converter (G3/2b1), Oxygen sensor heater upstream of catalytic converter (G3/2r1) |
||||
| Model | Wide-band oxygen sensor (LSU 4.9) | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Average heater current | mA | 400 | In idle | |
| Internal resistance | Ω | 100 | ||
| Pump current | μA | 20...25 | Center value | |
| μA | 800 | Maximum value | ||
| Pump cycle duration | ms | 400 | ||
| Nernst voltage | mV | 450 | ||
| Special features | Potential-free insulated sensor with 6-way connector | |||
| Throttle valve actuator (M16/6) consisting of: Throttle valve actuator motor (M16/6m1), Actual value potentiometer 1 (M16/6r1), Actual value potentiometer 2 (M16/6r2), |
||||
| Model | Actuator motor | |||
| Actuator motor supply voltage | 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 | |
| Resistance potentiometer 1 and 2 | Ω | 1200 | ± 30% | At the same time |
| Operating temperature | °C | -40...120 | ||
| Throttle valve diameter | mm | 82 | ||
| Special features | Counter-running potentiometer | |||
| Electric coolant pump (M75/11) (except code 494 (USA version)) | ||||
| Model | Electric coolant pump | |||
| Supply voltage | V | 12...16 | ||
| Nominal current | A | 37 | ||
| Standby current | mA | 100 | ||
| No-load current | μA | 100 | -40°C - 40°C and < 16 V | |
| Wide open throttle operation vent line heater element (R39/2) | ||||
| Model | Heating element | |||
| Rated voltage | V | 12 | Circuit 87 M2 | |
| Series resistor | Ω | 10 | At 25°C | |
| Coolant thermostat heating element (R48) | ||||
| Model | Heating element | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Operating current | A | <1.9 | ||
| Resistor | Ω | 9.5 | ± 1 Ω | At 25°C |
| Frequency | Hz | 141 | ||
| Oil level check switch (S43) | ||||
| Model | Reed contact (NC contact) | |||
| Resistor | Ω | ∞ | Oil level OK | |
| Ω | 0 | Minimum oil level not reached | ||
| Special features | 2-pin Micro-Quadlok CN | |||
| Ignition coils for cylinder 1 - 4 (T1/1 - T1/4) | ||||
| Model | Ignition coil | |||
| Supply voltage | V | 12 | ||
| Secondary voltage | V | 35.000 | ||
| Primary current | A | 21 | Charging current | |
| Primary resistance | Ω | 0.064 | ||
| Secondary resistance | Ω | 2.25 | ||
| Primary inductivity | μH | 289 | ||
| Secondary inductivity | H | 5.84 | ||
| Special features | Capacitive pick up for diagnosis | |||
| Intake camshaft solenoid (Y49/1), Exhaust camshaft solenoid (Y49/2) |
||||
| Model | Magnet | |||
| Supply voltage | V | 12 | Circuit 87 M3 | |
| Supply voltage | V | 10...16 | ||
| Maximum power consumption | A | < 3.0 | ||
| Coil resistance | Ω | 7.6 | ± 10% | |
| Frequency | Hz | 150 | Pulse width modulated signal | |
| Actuation | % | 5...95 | Pulse width modulated signal | |
| Ambient temperatures | °C | -40...155 | ||
| Purging switchover valve (Y58/1) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Supply voltage | V | 9 to 16 | ||
| Frequency | Hz | 200 | Pulse width modulated signal | |
| Coil resistance | Ω | 14.2 | ||
| Partial load operation crankcase ventilation system valve (Y58/2) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | ||
| On-board power supply voltage | V | 10...16 | ||
| Coil resistance | Ω | 32 | ± 1.6 | |
| Maximum flow | l/min | 30 | ||
| Working area | bar | -0.9...2 | ||
| Fuel tank shutoff valve (Y58/5) (for code 494 (USA version)) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | ± 0.1 | Circuit 87 M2 |
| Supply voltage | V | 9 to 16 | ||
| Power consumption | A | < 0.75 | ||
| Coil resistance | Ω | 16.6 | ± 5% | |
| Frequency pulse width modulated signal | Hz | 50 | ||
| Fuel vapor shutoff valve (Y75/1) (with code (494) USA version) | ||||
| Model | Solenoid valve | |||
| Supply voltage | 12 | ± 0.1 | ||
| Fuel injectors for cylinder 1 to 4 (Y76/1 - Y76/4) | ||||
| Model | Piezo-injectors | |||
| Resistor | _____________ kΩ | 220 | ± 10 kΩ | |
| Special features | 2-pin electrical connection Pin 1 (high side), Pin 2 (low side) | |||
| Boost pressure control pressure transducer (Y77/1) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Duty cycle | % | 100 | ||
| Duty cycle | % | 5...95 | At 10 V | |
| Operating frequency | Hz | 300 | Pulse width modulated signal | |
| Coil resistance | Ω | 10.5 | ± 0.7 | |
| Air consumption | l/h | <35 | ||
| Quantity control valve (Y94) | ||||
| Model | ||||
| 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 | Pulse width modulated signal | |
| Actuation | % | 10...90 | Pulse width modulated signal | |
| Deceleration air switchover valve (Y101) | ||||
| Model | Solenoid valve | |||
| Supply voltage | V | 12 | Circuit 87 M2 | |
| Supply 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 | Pulse width modulated signal |
| Wiring diagram for gasoline-DI control unit | N3/10 Engine connector | PE07.08-P-2101-97FBK | |
| N3/10 Vehicle connector | PE07.08-P-2101-97FBJ |