Gasoline Injection And Ignition System With Direct Injection, Function - GF07.70-P-0002MMM
ENGINE 276.8 in MODEL 166.063 as of model year 2016
Block diagram for networking the direct line
Block diagram for CAN-networking
Gasoline injection and ignition system with DI, general
The gasoline injection and ignition system with direct injection forms the engine management "MED 17.7.3" in an electrical combination with the sensors and actuators of engine 276.8 DI (D irect Injection). The short designation MED 17.7.3 means:
M = Moronic
E = E lectronic accelerator pedal
D = D irect injection
17.7.3 = Version 17.7.3
The whole engine management is contained in the ME-SFI [ME] control unit.
Sensor data are read in directly by the engine management and indirectly via the CAN network and the respective actuators are actuated. Here the individual functions and systems of the engine management are controlled and coordinated by the ME-SFI [ME] control unit.
The following table represents the model and major assembly overviews for the engine 276.8:
| Sales designation | Model | Motor | Transmission | Engine management | Notes |
|---|---|---|---|---|---|
| Model series 166 | |||||
| ML 500 4MATIC HYBRID | 166.063 | 276.821 | 724.204 | MED 17.7.3 |
The engine management is subdivided into the following systems:
- Basic functions
- Engine system
- Fuel injection system
- Ignition system
- Exhaust system
Basic functions
- Control unit diagnosis
- Fault memory
- European On-Board Diagnosis
- Diagnosis via CAN
- CAN network
- Flash programming
- Variant coding
- DAS stage 4 (FBS 4)
- Torque coordination
- Heat management
- Alternator interface
- Maximum vehicle speed limit
Diagnosis
For diagnostic purposes, the fault codes of the engine management system can be read out and deleted using Xentry Diagnostics, and individual diagnostic functions can be specifically actuated.
Transport mode
In transport mode various functions of the engine management are limited. Further information are available in the energy management function.
If the kilometer reading on the vehicle is more than 250 km, the system condition "vehicle transport mode" is automatically deactivated and can also not be reactivated any more by the Xentry Diagnostics.
CAN network
The ME-SFI [ME] control unit exchanges data with other control units that are integrated in the CAN network via the connected drive train CAN and engine CAN. The ME-SFI [ME] control unit also acts as an interface (Gateway) between the two CAN bus systems.
Flash programming
The engine management in the ME-SFI [ME] control unit is programmable, i.e. the complete software of the control unit can be exchanged (replaced) using XENTRY Diagnostics. The software required for control unit programming can be found on the diagnostic system diagnosis software DVD.
Variant coding
With variant coding the following vehicle versions and equipment can, for example, be coded using XENTRY Diagnostics:
- Vehicle model
- National version
- Exhaust variants
- Transmission version
Engine system
- Starter relay actuation
- Throttle valve control
- Safety fuel shutoff
- Transmission overload protection
- Electronic Stability Program control unit support
- Fully integrated transmission control support
- Driving on torque limitation
- Fan operation
- Throttle valve calibration
- Regulated adjustment of the intake and exhaust camshafts
- Boost pressure control (over wastegate)
- Automatic engine start/stop function
Fuel injection system
- Cylinder-selective DI
- Start, post-start phase and acceleration enrichment
- Warm-up control
- Idle speed control
- Limp-home function
- Rpm increase for an activated A/C
- Inertia fuel shutoff
- Fuel pump controlling
- Altitude adaptation
- Load change function
- Rpm limitation
Ignition system
- Multi-spark ignition
- Ignition map
- Rpm limitation
- Knock sensor system
- Synchronization of camshaft and crankshaft position
Exhaust system
- Catalytic converter heating
- Oxygen sensor heater controlling
- Straight-line lambda control
The operating conditions of the engine and the associated active partial functions of the engine management are described in the following documents:
| Ignition ON, function | GF07.10-P-1000MMM | ||
| Starting, function | GF07.10-P-1001MMM | ||
| Ignition OFF, function | GF07.10-P-1002MMM | ||
| Fuel supply, function | GF07.10-P-1003MNG | ||
| Injection regulation, function | GF07.10-P-1004MMX | ||
| Ignition system function | GF07.10-P-1005MMX | ||
| Synchronize fuel injection and firing order function | GF07.10-P-1006MNG | ||
| Start, post-start phase and warm-up enrichment, function | GF07.10-P-1007MMX | ||
| Rpm control, function | GF07.10-P-1008MNG | ||
| Lambda control, function | GF07.10-P-1010MNG | ||
| Smooth running control, function | GF07.10-P-1011MNG | ||
| Thermal management, function | GF07.10-P-1012MMX | ||
| Torque coordination, function | GF07.10-P-1013MMM | ||
| Deceleration fuel shutoff, function | GF07.10-P-1014MMM | ||
| Knock control, function | GF07.10-P-1015MMX | ||
| Camshaft adjustment, function | GF07.10-P-1016MNG | ||
| Engine limp-home mode, function | GF07.10-P-1019MMM | ||
| European OBD, function | GF07.10-P-1021MNG | ||
| Automatic engine start/stop function | GF07.10-P-1043MMM | ||
| Charging, function | GF09.00-P-2000MMX | ||
| Exhaust treatment function | GF14.00-P-3000MNG | ||
| Electronic accelerator function | GF30.20-P-3015MMM | ||
| Refueling safety detection function | ENGINE 276.8 in MODEL 166.063 as of model year 2016 with CODE 494 (US version) | GF47.00-P-1000MMM | |
| On-board refueling vapor recovery function | ENGINE 276.8 in MODEL 166.063 as of model year 2016 with CODE 494 (US version) | GF47.10-P-3004MNG | |
| Purging function | GF47.30-P-3015MMY | ||
| Purge system with leak test, function | ENGINE 276.8 in MODEL 166.063 as of model year 2016 with CODE 494 (US version) | GF47.30-P-3017MMM | |
| Overview of system components for gasoline injection and ignition system with direct injection | GF07.70-P-9998MMM |