ME-SFI driving mode, function

P07.61-3373-09

A1 Instrument cluster

A9 Refrigerant compressor

A16 Knock sensor

B2/5 Hot film mass air flow sensor

B6/1 Camshaft Hall sensor

B11/4 Coolant temperature sensor

B37 Accelerator pedal sensor

G2 Alternator

G3/1 O2 sensor downstream TWC [KAT]

G3/2 O2 sensor upstream TWC [KAT]

K40/1kC Fuel pump 2 relay

K40/1kE Starter relay

K40/1kH Fan stage 1 relay

K40/1kK Fuel pump 1 relay

K40/1kO Fan stage 2 relay

L8 Crankshaft rpm sensor

X11/4 Data link connector

Y49 Adjustable camshaft timing solenoid

Y58 Activated charcoal filter shutoff valve

Y62/1 Cylinder 1 fuel injection valve

Y62/2 Fuel injector Cylinder 2

Y62/3 Fuel injector Cylinder 3

Y62/4 Cylinder 4 fuel injection valve

Y74 Pressure regulator valve

Y77 Wastegate valve

CAN-C Controller Area Network bus, class C (engine compartment) (CAN C)

M1 Starter

M3/3 Fuel pump with fuel level sensor

M4/2 Engine coolant fan motor

M16/6 Throttle valve actuator

N2/7 Restraint systems control unit

N3/10 Motor electronics control unit

N10/10 Left SAM control unit

N22 AAC [KLA] control and operating unit

N47-5 ESP control unit

S2/1 Ignition/starter switch

S40/3 Clutch pedal switch

S41/1 Engine oil pressure switch

T1/1 Cylinder 1 ignition coil

T1/2 Cylinder 2 ignition coil

T1/3 Cylinder 3 ignition coil

T1/4 Cylinder 4 ignition coil

Function

The following sub-functions are active:

 Alternator interface
- Messages are exchanged between the motor electronics control unit and the alternator via the alternator interface.

 Maximum engine speed limitation
- For protection of the engine and the drive train the engine speed is limited

 Motor Electronics (ME-SFI) ignition system
- The static high-voltage is distributed without an ignition distributor straight to the spark plugs

 Cylinder-sequential port injection
- Injection takes place via the fuel injection valves directly upstream of the respective intake valve

 Fuel pump actuation
- The fuel pump provides sufficient fuel in all operating conditions

 Acceleration enrichment
- Dynamic enrichment prevents jerking when accelerating.

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 Safety fuel shutoff
- In the event of a crash, the fuel pump is shut off and the fuel injection valves actuated briefly

 Two sensor control
- The effect of the catalytic converter is monitored by the signals from the O2 sensor upstream TWC [KAT] and by the signals from the O2 sensor downstream TWC [KAT]

 Warm-up control
- The catalytic converter and the engine are brought rapidly to the operating temperature

 Fan control
- The fan motor is actuated in two stages to reduce the coolant temperature

 O2 sensor heater
- The O2 sensor heater brings the O2 sensor upstream TWC [KAT] and the O2 sensor downstream TWC [KAT] rapidly to the operating temperature

 Catalytic converter heating up
- The catalytic converter is brought rapidly to the operating temperature

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 Synchronization of the injection and firing order
- Synchronization is required to actuate the ignition coils and the fuel injection valves

 Knock control
- Guarantees knock-free operation of the engine with various fuel qualities and under all operating conditions.

 Overrun fuel shutoff
- The braking effect of the engine is increased in overrun mode and fuel consumption reduced

 Camshaft adjustment
- Camshaft adjustment lowers the emission values and increases performance

 Fuel regeneration
- Fuel vapors are fed to the engine for regeneration, which also prevents fuel vapors from escaping into the atmosphere

 Boost pressure control
- The wastegate valve regulates the boost pressure of the turbocharger

 Altitude adaptation
- The ambient pressure is measured by the integrated pressure sensor in the motor electronics control unit

 European On-Board Diagnosis (EOBD)
- Continuously monitors all exhaust related systems and components