(Gasoline Injection And Ignition System With Direct Injection, Function - GF07.70-P-0002MMR)
Engine 157.9, 278.9 in MODEL 166
up to model year 2016
Block diagram
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 engines 157 AMG and 278 DI (D irect I njection).
The short designation "MED 17.7.3" means:
M = Motronic
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 directly read in from the Engine management and indirectly via the CAN network and actuate the control actuators as required. 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 engines 157 and 278:
| Sales designation | Model | Motor | Transmission | Engine management | Notes |
|---|---|---|---|---|---|
| Model series 166 | |||||
| ML 500 4MTIC | 166.073 | 278.928 | 722.909 | MED 17.7.3 | |
| ML 63 4MTIC | 166.074 | 157.982 | 722.905 722.931 |
MED 17.7.3 | |
| LG 450 4MATIC | 166.872 | 278.928 | 722.909 | MED 17.7.3 | |
| LG 500 4MATIC | 166.873 | 278.928 | 722.909 | MED 17.7.3 | |
| GL 63 AMG | 166.874 | 157.982 | 722.905 | MED 17.7.3 |
The Engine management is subdivided into the following systems:
- Base functions
- Engine system
- Fuel injection system
- Ignition system
- Exhaust system
Base functions
- Control unit diagnosis
- Fault memory
- OBD II (OBD II)
- Diagnosis via CAN
- CAN network
- Flash programming
- Variant coding
- Drive authorization system stage 3 (DAS 3)
- Torque coordination
- Thermal management
- Alternator interface
- Maximum 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 of the vehicle is more than 250 km, the system condition "vehicle transport mode" is automatically deactivated and can also not be reactivated anymore using the diagnostic equipment.
CAN network
The ME-SFI [ME] control unit exchanges data with other control units via the connected drive train CAN and chassis CAN 1 which are integrated in the CAN network.
The ME-SFI [ME] control unit also acts as an interface (Gateway) between the two CAN bus systems. It is also connected to the drivetrain LIN and exchanges data via it.
Flash programming
The Engine management in the ME-SFI [ME] control unit is flushable, 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 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
- Suction fan actuation
- Throttle valve calibration
- Regulated adjustment of the intake and exhaust camshafts
- Boost pressure control (over wastegate)
- ECO start/stop function (with CODE B03 (ECO 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
- Deceleration fuel shutoff
- Fuel pump controlling
- Altitude adaptation
- Load change function
- Rpm limitation
Ignition system
- Multi-spark ignition
- Ignition map
- Rpm limitation
- Knock control
- 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-1000MMR | ||
| Starting, function | GF07.10-P-1001MMR | ||
| Ignition OFF, function | GF07.10-P-1002MMR | ||
| Fuel supply, function | GF07.10-P-1003MMR | ||
| Injection regulation, function | GF07.10-P-1004MMR | ||
| Ignition system function | GF07.10-P-1005MMR | ||
| Synchronize fuel injection and firing order function | GF07.10-P-1006MMR | ||
| Start, post-start phase and warm-up enrichment, function | GF07.10-P-1007MMR | ||
| Rpm control, function | GF07.10-P-1008MMR | ||
| Alternator interface function | GF07.10-P-1009MMR | ||
| Lambda control, function | GF07.10-P-1010MMR | ||
| Smooth running control, function | GF07.10-P-1011MMR | ||
| Thermal management, function | GF07.10-P-1012MMR | ||
| Torque coordination, function | GF07.10-P-1013MMR | ||
| Deceleration fuel shutoff, function | GF07.10-P-1014MMR | ||
| Knock control, function | GF07.10-P-1015MMR | ||
| Camshaft adjustment, function | GF07.10-P-1016MMR | ||
| Engine limp-home mode, function | GF07.10-P-1019MMR | ||
| On-board diagnosis, function | GF07.10-P-1020MMR | ||
| Engine timing start-stop function | Engine 157.9, 278.9 in MODEL 166 up to model year 2016 with CODE B03 (ECO start/stop function) The "ECO start/stop function" function is seen from the point of view of the Engine management. Information for the partial function "ECO start/stop function energy management" is documented in the function description "Energy management function". |
GF07.10-P-1041MMR | |
| Charging, function | GF09.00-P-2000MMR | ||
| Exhaust treatment function | GF14.00-P-3000MMR | ||
| Electronic accelerator function | GF30.20-P-3015MMR | ||
| On-board refueling vapor recovery function | Engine 157.9, 278.9 in MODEL 166 up to model year 2016 with CODE 494 (US version) |
GF47.10-P-3004MMR | |
| Purging function | GF47.30-P-3015MMR | ||
| Purging system with leak test function | Engine 157.9, 278.9 in MODEL 166 up to model year 2016 with CODE 494 (US version) |
GF47.30-P-3016MMR | |
| Overview of system components for gasoline injection and ignition system with direct injection | GF07.70-P-9998MMG |