Motor electronics (ME-SFI) for a fuel injection and ignition system, function - GF07.61-P-0001MIS
ENGINE 272.9 (except 272.974) in MODEL 221.0 /1 (except 221.095 /195) as of model year 2009/AEJ 08
ENGINE 273.9 in MODEL 216.3, 221.0 /1 as of model year 2009/ AEJ 08
Gasoline injection and ignition system ME-SFI, general points
The ME-SFI gasoline injection and ignition system is supplied by "Robert Bosch GmbH" and, when connected electrically with the sensors and actuators of engine 272 and 273 KE (port injection), forms the "ME 9.7" engine control.
The abbreviated designation "ME 9.7" means:
M= M otronic
E= E lectronic accelerator pedal
9.7 = Version 9.7
The whole engine control is located in the ME-SFI [ME] control unit (N3/10), which is subdivided in the following systems:
- Basic functions
- Engine system
- Injection system
- Ignition system
- Exhaust system
Sensor data is directly read in from the engine control and indirectly via the CAN interconnection and actuates the respective actors. The following functions and systems are controlled and coordinated:
Basic functions
- Control system diagnosis
- Fault memory
- On-board diagnosis II (OBD II)
- Diagnosis via CAN
- CAN interconnection
- Flash programming
- Variant coding
- Drive authorization system (DAS 3).
- Torque interface
- Heat management
- Alternator interface
- Controlled intake/exhaust camshaft adjustment
- Maximum vehicle speed limit
Diagnosis
For diagnostic purposes, the Diagnosis Assistance System (DAS) can be used to read out and delete the engine control fault codes, and to actuate certain specific diagnostic functions.
CAN interconnection Via the connected drive train CAN (CAN C) and chassis CAN (CAN E), the ME-SFI [ME] control unit exchanges data with the other control units integrated in the CAN network.
The ME-SFI [ME] control unit also acts as the interface (gateway) between the two CAN bus systems.
Flash programming
The engine control in the ME-SFI [ME] control unit is flash programmable, that is the complete software in the control unit can be replaced using the DAS (installed new). The software required to program the control units is provided on the STAR DIAGNOSIS DAS Update DVD.
Variant coding
Using variant coding the following vehicle versions and equipment can be coded using the DAS:
- Vehicle model
- National version
- Exhaust variants
- Transmission version
- With or without a catalytic converter
Engine system
- Start relay actuation
- Throttle flap control
- Safety fuel shutoff
- Transmission overload protection
- Secondary air injection
- Assist the Electronic Stability Program (ESP)
- Support for fully integrated transmission control (VGS)
- Starting torque limitation
- Suction fan actuation
- Calibration of throttle valve
- Intake manifold length switchover
- Tumble flap switchover
Injection system
- Cylinder-sequential port injection
- Start, post-start phase and acceleration enrichment
- Warm running regulation
- Idle speed control
- Cylinder-sequential fuel metering
- Limp-home function
- RPM increase of air conditioning
- Inertia fuel shutoff
- Fuel pump actuation
- Altitude adaptation
- Load change function
- RPM limitation
Ignition system
- Single spark ignition
- Ignition map
- RPM limitation
- Knock sensor system
- Synchronization of camshaft and crankshaft positions
Exhaust system
- Catalytic converter heating
- Oxygen sensor heater control unit
- Straight-line lambda control
The operating conditions of the engine and the active partial functions of the engine control is described in the following documents:
- ME-SFI ignition ON, function
- ME-SFI starting, function
- ME-SFI idle, function
- ME-SFI driving mode, function
- ME-SFI ignition OFF function
| Motor electronics (ME-SFI) gasoline injection and ignition system, model and major assembly overview | GF07.61-P-0001-12MIS | |
| Motor electronics (ME-SFI) gasoline injection and ignition system, block diagram | Engine 273 | GF07.61-P-0001-13MLS |
| (ME-SFI) motor electronics gasoline injection and ignition system, location of components on engine | GF07.61-P-0001-14MIS | |
| (ME-SFI) motor electronics fuel injection and ignition system, location of components on vehicle | GF07.61-P-0001-15MIS | |
| ME-SFI ignition ON, function | GF07.61-P-3005MIS | |
| ME-SFI starting, function | GF07.61-P-2003MIS | |
| ME-SFI idle, function | GF07.61-P-2006MIS | |
| ME-SFI driving mode, function | GF07.61-P-2005MIS | |
| ME-SFI ignition OFF function | GF07.61-P-3006MIS |