GF07.61-P-0001MAW Motor Electronics (ME-SFI) Gasoline Injection and Ignition System, Function
GF07.61-P-0001MAW Motor Electronics (ME-SFI) Gasoline Injection and Ignition System, Function
ENGINES 156.985 in MODEL 204.077 /277 /377, 212.077 /277
Phantom view of engine 156 AMG
Gasoline injection and ignition system ME-SFI, general
The gasoline injection and ignition system ME-SFI is supplied by "Robert Bosch GmbH" and, in combination with the sensors and actuators on engine 156 AMG, forms the "ME 9.7 AMG" engine timing.
The abbreviated designation "ME 9.7 AMG" means:
M = Motronic
E = Electronic accelerator pedal
9.7 = Version 9.7 AMG = AMG specific hardware and software
The ME-SFI [ME] control unit (N3/10) contains the whole engine timing.
The engine timing system reads in sensor data both directly and via the CAN network and actuates the corresponding actuators. Here the individual functions and systems of the engine timing are controlled and coordinated by the ME-SFI [ME] control unit.
The following table represents the model and major assembly overviews for the engine 156 AMG:
The engine timing is subdivided into the following systems:
^ Basic functions
^ Engine system
^ Injection system
^ Ignition system
^ Exhaust system
Basic functions
- Control unit diagnosis
- Fault memory
- On-board diagnosis II (OBD II)
- Diagnosis via CAN
- CAN network
- Flash programming
- Variant coding
- Drive authorization system stage 3 (DAS 3)
- Torque coordination
- Heat management
- Alternator interface
- Maximum vehicle speed limit
Diagnosis
For diagnostic purposes, the fault codes from the engine timing can be read off and deleted with Xentry Diagnostics, and specific diagnostic functions initiated.
CAN network
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 timing in the ME-SFI [ME] control unit is flash programmable, that is the complete software in the control unit can be replaced using the Xentry diagnostics (replaced). The software required for control unit programming can be found on the Star Diagnosis software DVD.
Variant coding
Using variant coding the following vehicle versions and equipment can be coded using Xentry Diagnostics:
- Vehicle model
- National version
- Exhaust variants
- Transmission version
- With or without a catalytic converter
Engine system
- Start relay actuation
- Throttle valve control
- Safety fuel shutoff
- Transmission overload protection
- Secondary air injection
- Support brace for Electronic Stability Program (ESP)
- Support brace for fully integrated transmission control (VGS)
- Starting torque limitation
- Suction fan actuation
- Controlled intake/exhaust camshaft adjustment
- Throttle valve calibration
- Intake manifold length switchover
- Engine oil cooling
Injection system
- Sequential port injection
- Cylinder-selective fuel metering
- Start, post-start phase and acceleration enrichment
- Warm running regulation
- Idle speed control
- Limp-home function
- Speed increase for air conditioning
- Deceleration fuel shutoff
- Fuel pump control
- Altitude adaptation
- Load change function
- rpm control
Ignition system
- Single spark ignition
- Ignition map
- rpm control
- Knock control
- Synchronization of camshaft and crankshaft positions
Exhaust system
- Catalytic converter heating
- Oxygen sensor heater control
- Straight-line lambda control
The operating conditions of the engine and the concurrently active engine timing subfunctions are described in the following documents:
^ Ignition ON, function
^ Starting, function
^ Ignition OFF, function
^ Fuel supply, function
^ Injection regulation, function
^ Ignition system function
^ Synchronize fuel injection and firing order function
^ Start, post-start phase and warm-up enrichment, function
^ Rpm control, function
^ Alternator interface, function
^ Lambda control, function
^ Smooth running control, function
^ Thermal management, function
^ Torque coordination, function
^ Deceleration fuel shutoff, function
^ Knock control, function
^ Camshaft adjustment, function
^ Intake manifold switchover, function
^ Engine limp-home mode, function
^ On-board diagnosis, function
^ Exhaust treatment, function
^ Electronic accelerator function
^ Refueling gas recovery function (with code (494) USA version)
^ Purging function
^ System purging with leak test function (with code (494) USA version)
