GF07.61-P-6000MLJ | ME-SFI [ME] control unit, component description | 18.4.12 |
ENGINES 273.9 in MODEL 463 as of model year 2013
/ YoM 12 model refinement package
P07.61-3805-76
View of engine from front
N3/10 ME-SFI [ME] control unit
Location
The ME-SFI [ME] control unit is located at the rear in the middle on the 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
- Emission control
- Diagnosis and fault storage
- Injection control
- Electronic accelerator
- Drive authorization system and immobilizer
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- Alternator interface
- Regulated camshaft adjustment
- Fuel supply
- Torque interface
- Intake manifold and tumble flap switchover
- Heat management
- Ignition system
Reading in of sensors and signals
Input factors are read in by means of the following connections:
- Direct line
- Drivetrain LIN (LIN C1)
- Drive train CAN (CAN C)
- Chassis CAN 1 (CAN E1)
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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
- Drivetrain LIN (LIN C1)
- Drive train CAN (CAN C)
- Chassis CAN 1 (CAN E1)
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 timing:
Input factors over the direct line | Initial parameters over the direct line | Supplemental information |
Terminal 15 | - | - |
Circuit 30 (fused) | - | - |
Circuit 31 | - | - |
Circuit 87 (M4) | - | - |
Knock sensor 1 (A16/1) | - | - |
Knock sensor 2 (A16/2) | - | - |
Hot film mass air flow sensor (B2/5) | - | |
Intake air temperature sensor (B2/5b1) | - | |
Fuel tank pressure sensor (B4/3) | - | For code (ZU8) USA version |
LH intake camshaft Hall sensor (B6/4) | - | - |
RH intake camshaft Hall sensor (B6/5) | - | - |
LH exhaust camshaft Hall sensor (B6/6) | - | - |
RH exhaust camshaft Hall sensor (B6/7) | - | - |
Coolant temperature sensor (B11/4) | - | - |
Pressure sensor (B28), intake manifold air pressure | - | - |
Position sensor for left intake manifold tumble flap (B28/9) | - | - |
Position sensor for right intake manifold tumble flap (B28/10) | - | - |
Accelerator pedal sensor (B37) | - | - |
Crankshaft Hall sensor (B70) | - | - |
Secondary air injection relay (F58kE) | - | - |
Circuit 15 relay (F58kR) | - | - |
- | Starter circuit 50 relay (F58kM) | - |
Circuit 87 M relay (F58kN) | Circuit 87M relay (F58kN) | - |
LH oxygen sensor sensor element upstream of catalytic converter (G3/3b1) | - | - |
- | Left oxygen sensor heater upstream of catalytic converter (G3/3r1) | - |
Right oxygen sensor sensor element upstream of catalytic converter (G3/4b1) | - | - |
- | Right oxygen sensor heater upstream of catalytic converter (G3/4r1) | - |
Left oxygen sensor sensor element downstream of catalytic converter (G3/5b1) | - | - |
- | Left oxygen sensor heater downstream of catalytic converter (G3/5r1) | - |
Right oxygen sensor sensor element downstream of catalytic converter (G3/6b1) | - | - |
- | Right oxygen sensor heater downstream of catalytic converter (G3/6r1) | - |
Fan motor (M4/7) | Fan motor (M4/7) | - |
Actual value potentiometer 1 (M16/6r1), throttle valve | - | - |
Actual value potentiometer 2 (M16/6r2), throttle valve | - | - |
- | Actuator motor (M16/6m1), throttle valve | - |
Supplemental Restraint System control unit (N2/10) | - | - |
- | Fuel pump control unit (N118) | - |
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) | - |
- | Cylinder 5 ignition coil (T1/5) | - |
- | Cylinder 6 ignition coil (T1/6) | - |
- | Cylinder 7 ignition coil (T1/7) | - |
- | Cylinder 8 ignition coil (T1/8) | - |
- | Intake manifold switchover valve (Y22/6) | |
- | Intake manifold tumble flap switchover valve (Y22/9) | - |
- | Secondary air injection pump switchover valve (Y32) | - |
- | LH intake camshaft solenoid (Y49/4) | - |
- | RH intake camshaft solenoid (Y49/5) | - |
- | LH exhaust camshaft solenoid (Y49/6) | - |
- | RH exhaust camshaft solenoid (Y49/7) | - |
- | Purge control valve (Y58/1) | - |
- | Activated charcoal canister shutoff valve (Y58/4) | For code (ZU8) USA version |
- | Cylinder 1 injection valve (Y62/1) | - |
- | Cylinder 2 injection valve (Y62/2) | - |
- | Cylinder 3 injection valve (Y62/3) | - |
- | Cylinder 4 injection valve (Y62/4) | - |
- | Cylinder 5 injection valve (Y62/5) | - |
- | Cylinder 6 injection valve (Y62/6) | - |
- | Cylinder 7 injection valve (Y62/7) | - |
- | Cylinder 8 injection valve (Y62/8) | - |
- | Coolant thermostat (Y110) |
Input factors via the drivetrain LIN (LIN C1) | Initial parameters via the drivetrain LIN (LIN C1) | Supplemental information |
Alternator (G2) | Alternator (G2) | - |
Input factors via drive train CAN (CAN C) | Initial parameters via drive train CAN (CAN C) | Supplemental information |
Fuel pump control unit (N118) | Fuel pump control unit (N118) | - |
Control unit for fully integrated transmission control (Y3/8n4) | Control unit for fully integrated transmission control (Y3/8n4) | - |
Input factors via chassis CAN 1 (CAN E1) | Initial parameters via chassis CAN 1 (CAN E1) | Supplemental information |
Instrument cluster (A1) | Instrument cluster (A1) | via chassis CAN 2 (CAN E2) and electronic ignition lock control unit (N73) |
DISTRONIC electric controller unit (A89) | DISTRONIC electric controller unit (A89) | via the vehicle dynamics CAN (CAN H) and Electronic Stability Program control unit (N30/4) |
Supplemental Restraint System control unit (N2/10) | - | - |
SAM control unit (N10) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
A/C control and operating unit (N22/7) | - | via interior CAN (CAN B) and electronic ignition lock control unit (N73) |
Electronic Stability Program control unit (N30/4) | - | - |
Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
Steering column tube module control unit (N80) | - | - |
Diagnostic connector (X11/4) | Diagnostic connector (X11/4) | via the diagnostic CAN (CAN D) and electronic ignition lock control unit (N73) |
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 dust.
The housing contains the 32-bit measuring and control electronics for the engine control.
Power supply
The ME-SFI [ME] control unit is "circuit 30 fused" and also supplied with a voltage for ignition ON by "circuit 87 M1" .
In the operating voltage range it has both short-circuit protection and reversed polarity protection.
Power is supplied through several pins connected in parallel to relieve the electrical connectors.
Ground connection
The "circuit 31" ground connection is made via multiple ground lines to the ground connection for the right A-pillar (W29/2).
No-load current shutoff
Information for partial function "no-load current shutoff" is documented in the function description "Energy management engine OFF function".
Variants
The engine control 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 | 13.5 | ||
Voltage limit: minimum | V V | 5.5 19.0 | For t<100 ms | |
Power consumption: Quiescent current | μA A A | 100 6.0 11.5 |
Minimum Maximum | |
Reverse polarity protection | Yes | |||
Short-circuit resistance | Yes | |||
Additional specific parameters | No | |||
Special features | No | |||
Flash capability/coding capability | Yes/yes | |||
Right knock sensor (A16/1), LH knock sensor (A16/2) | ||||
Model | Capacitive sensor (piezo crystal) | |||
Capacity | pF | 950 - 1350 | Sensor capacitance plus cable capacitance | |
Sensitivity | mV/g | 26 | 8 mV/g | |
Resistor | MΩ | >10 | ||
Linearity | kHz | 3 - 20 | ||
Hot-film MAF sensor (B2/5) | ||||
Model | Hot film sensor | |||
Supply voltage | V | 12 | Circuit 87M1 | |
Frequency range | kHz | 1.9 - 7 | Small air mass = small frequency | |
Duty cycle | % | 5 - 95 | ||
Intake air temperature sensor (B2/5b1) | ||||
Model | NTC resistor | |||
Resistance at: 20°C 30°C 40°C | Ω Ω Ω | 2420 1662 1166 | ||
Special features | integrated in hot film mass air flow sensor | |||
Fuel tank pressure sensor (B4/3) | ||||
Model | Pressure sensor | |||
Supply voltage | V | 5.0 | 5% | |
Power consumption | mA | < 10 | ||
Measuring range | mbar | -50 - 30 | ||
Output voltage swing | V | 0.5 - 4.5 | ||
Characteristic for: -50 mbar 0 mbar 30 mbar | V V V | 0.5 3.0 4.5 | ||
LH intake camshaft Hall sensor (B6/4) RH intake camshaft Hall sensor (B6/5) LH exhaust camshaft Hall sensor (B6/6) RH exhaust camshaft Hall sensor (B6/7) | ||||
Model | Hall sensor | |||
Supply voltage: Circuit 87 M1 | V V | 12 12 | B6/5, B6/7 B6/4, B6/6 | |
Operating voltage | V | 4.5 - 24 | ||
Maximum power consumption | mA | < 20 | ||
Output signal: LOW HIGH | V V | 1.4 4.0 | ||
Coolant temperature sensor (B11/4) | ||||
Model | NTC resistor | |||
Resistance at: 0° C 30°C 60°C 90°C 110°C | Ω Ω Ω Ω Ω | 8101 1998 627 234 131 | ||
Signal plausibility | V | 0.10 - 4.93 | ||
Special features | Arbitrary polarity | |||
Pressure sensor (intake manifold air pressure) (B28) | ||||
Model | Pressure sensor | |||
Supply voltage | V | 5.0 | ||
Characteristic for: 1.2 bar 1.0 bar 0.8 bar 0.3 bar 0.1 bar | V V V V V | 4.5 4.0 3.3 1.3 0.5 | ||
Position sensor for left intake manifold tumble flap (B28/9), Position sensor for right intake manifold tumble flap (B28/10) | ||||
Model | Hall sensor | |||
Supply voltage | V | 5.0 | 15% | |
Operating voltage | V | 5 - 20 | ||
Power consumption | mA | 4 - 8 | ||
Precision of position recognition | 5° | |||
Accelerator pedal sensor (B37) | ||||
Model | 2 Hall sensors | |||
Supply voltage | V | 5.0 | ||
Special features | Direct contacting over 6-pin AMP plug | |||
Crankshaft Hall sensor (B70) | ||||
Model | Hall sensor | |||
Supply voltage | V | 5.0 | ||
Installation | mm | 0.8 | 0.5 mm | Distance to increment wheel |
Alternator (G2) | ||||
Model | A/C alternator with integral rectification | |||
Electrical output | W | |||
Interface transfer rate: Maximum | kbit/s | 20 | Communication with the ME-SFI [ME] control unit via the LIN bus | |
Special features | Self-diagnosis | |||
Left oxygen sensor upstream of catalytic converter (G3/3) consisting of: Left oxygen sensor sensor element upstream of catalytic converter (G3/3b1), Right oxygen sensor upstream of catalytic converter (G3/4) consisting of: | ||||
Model | Wideband oxygen sensor (LSU 4.9) | |||
Supply voltage | V | 12 | Circuit 87 M2 | |
Voltage limit: minimum | V V | 10.8 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 | |||
Left oxygen sensor downstream of catalytic converter (G3/5) consisting of: Left oxygen sensor sensor element downstream of catalytic converter (G3/5b1), Right oxygen sensor downstream of catalytic converter (G3/6) consisting of: | ||||
Model | Narrow band oxygen sensor (LSF 4.2) | |||
Supply voltage | V | 12 | Circuit 87 M2 | |
Sensor voltage | V V | approx. 1 approx. 0 | Direction rich mixture Direction lean mixture | |
Frequency | Hz | 10 | ||
Special features | Potential-free insulated sensor with 4-way connector | |||
Fan motor (M4/7) | ||||
Model | Electric suction fan | |||
Supply voltage | V | 12 | Circuit 87 M2 Circuit 30 | |
Specified speed of the fan | over a pulse width modulated signal (PWM signal) from the ME-SFI [ME] control unit | |||
Frequency of the PWM signal | Hz | 10 | ||
Duty cycle of the PWM signal | % | 10 - 90 | ||
High level | V | >5.7 | ||
Low level | V | < 3.7 | ||
Throttle valve actuator (M16/6) consisting of: Actual value potentiometer 1 (M16/6r1), Actual value potentiometer 2 (M16/6r2), Actuator motor (M16/6m1) | ||||
Model | DC actuator motor with 2 actual value potentiometers | |||
Supply voltage of the actuator motor | V | 12.0 | ||
Typical power consumption of the actuator motor | A A A | 1 9 12 | Mean value Peak value Reversing operation | |
Supply voltage for potentiometer | V | 5.0 | ||
PWM signal (actuation) | Hz | 2000 | ||
Output stage protection | A | 6.0 | Maximum 30 s, current limited by output stage | |
Actual value potentiometer in idle (minimum throttle valve angle) | V V | approx. 0.5 approx. 5.0 | IP1 (minimum voltage) IP2 (maximum voltage) | |
Diameter of throttle valve | mm | 74 | ||
Special features | Actual value potentiometer in the opposite direction | |||
Electric air pump (M33) | ||||
Model | Electrical vane pump | |||
Supply voltage | V | 12 | Circuit 30 via secondary air injection relay (F58kE) | |
Power | W | 480 | ||
Oil level indicator switch (S43) | ||||
Model | Reed contact (normally closed contact) | |||
Resistor | Ω Ω | 0 | Oil level OK Minimum oil level not reached | |
Special features | 2-pin MLK connector Pin 1 blank | |||
Ignition coils for cylinders 1 to 8 (T1/1 - T1/8) | ||||
Model | Directly plugged in single-spark ignition coil | |||
Supply voltage: Circuit 87 M1 | V V | 12 12 | T1/1, T1/4, T1/6, T1/7 T1/2, T1/3, T1/5, T1/8 | |
Primary current | A | 11.9 | Peak value | |
Reverse polarity protection | Yes | |||
Short-circuit resistance | Yes | |||
Special features | Capacitive pick up for diagnosis | |||
Intake manifold switchover valve (Y22/6), Intake manifold tumble flap switchover valve (Y22/9) | ||||
Model | Electrical switchover valve | |||
Supply voltage | V | 12 | Circuit 87 M2 | |
Coil resistance | Ω | 30 | 1.4 Ω | at 20°C |
Secondary air injection pump switchover valve (Y32) | ||||
Model | Electrical switchover valve | |||
Supply voltage | V | 12 | Circuit 87 M2 | |
Coil resistance | Ω | 28.1 | 5% | at 20°C |
LH intake camshaft solenoid (Y49/4) RH intake camshaft solenoid (Y49/5) LH exhaust camshaft solenoid (Y49/6) RH exhaust camshaft solenoid (Y49/7) | ||||
Model | Solenoid | |||
Supply voltage: Circuit 87 M1 | V V | 12 12 | Y49/5, Y49/7 Y49/4, Y49/6 | |
Coil resistance | Ω | 7.5 | at 23°C | |
Inductance | mH | 23 | 15% | |
PWM carrier frequency | Hz | 150 | ||
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 | |||
Start position of the intake camshaft | 36° after top dead center | |||
Start position of the exhaust camshaft | 20° before top dead center | |||
Purge control valve (Y58/1) | ||||
Model | Solenoid valve | |||
Supply voltage | V | 12 | Circuit 87 M2 | |
Actuation | % | 0 - 100 | Pulse width modulated signal (PWM signal) | |
PWM carrier frequency | Hz | 10 | ||
Coil resistance | Ω | >26 | at 20°C | |
Activated charcoal canister shutoff valve (Y58/4) (for code (ZU8) USA version) | ||||
Model | Solenoid valve | |||
Supply voltage | V | 12 | Circuit 87 M2 | |
Coil resistance | Ω | 14.5 | 5% | at 20°C |
Injection valves for cylinder 1 to 8 (Y62/1 - Y62/8) | ||||
Model | Solenoid valve | |||
Supply voltage: Circuit 87 M1 | V V | 12 12 | Y62/1, Y62/4, Y62/6, Y62/7 Y62/2, Y62/3, Y62/5, Y62/8 | |
Coil resistance | Ω | 12 | at 20°C | |
Coolant thermostat (Y110) | ||||
Model | Resistance heating element | |||
Supply voltage | V | 12 | Circuit 87 M2 | |
Coil resistance | Ω | 15.3 | 1.5 Ω | at 20°C |