Gasoline Injection And Ignition System With Direct Injection, Function - GF07.70-P-0002MNH
Engine 176.9, 177.9 in model 463
as of model year 2019
Block diagram for networking the direct lines
Block diagram for CAN-networking
Gasoline injection and ignition system with DI, general points
The gasoline injection and ignition system with direct injection forms the engine management "MED 17.7.4" in an electrical network with the sensors and actuators of engine 176/177 DI (Direct Injection). The short designation MED 17.7.4 means:
M = Motronic
E = E lectronic accelerator
D = D irect injection
17.7.4 = Version 17.7.4
The whole engine management is contained in the ME-SFI 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 control unit.
The following table provides an overview of the vehicle model and major assembly overviews:
The operating conditions of the engine and the associated active functions of the engine management are described in the following documents.
With variant coding the following vehicle versions and equipment can, for example, be coded using XENTRY Diagnostics:
| Sales designation | Model | Motor | Transmission | Engine management | Notes |
|---|---|---|---|---|---|
| G 63 AMG | 463.276 | 177.980 | 725.085 | MED 17.7.4 | - |
| G 63 AMG | 463.277 | 177.980 | 725.085 | MED 17.7.4 | - |
| G 500 | 463.234 | 176.980 | 722.909 | MED 17.7.4 | - |
| G 500 4x42 | 463.234 | 176.980 | 722.909 | MED 17.7.4 | - |
| G 550 | 463.239 | 176.980 | 722.909 | MED 17.7.4 | - |
| G 550 4x42 | 463.255 | 176.980 | 722.909 | MED 17.7.4 | - |
| G 500 | 463.260 | 176.980 | 725.035 | MED 17.7.4 | - |
| G 550 | 463.261 | 176.980 | 725.035 | MED 17.7.4 | - |
| G 63 AMG | 463.276 | 177.980 | 725.085 | MED 17.7.4 | - |
| G 63 AMG | 463.277 | 177.980 | 725.085 | MED 17.7.4 | - |
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 (EOBD)
- Diagnosis via CAN
- Control module programming
- Transport mode
- 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.
CAN network
The ME-SFI control unit is networked via the drive CAN and engine CAN with the vehicle electronics.
Control module programming
The engine management in the ME-SFI control unit is flashable, that is the complete software in the control unit can be replaced using the Xentry diagnosis (replaced). The software required for control unit programming can be found on the diagnosis system software DVD.
Transport mode
In transport mode various functions of the engine management are limited. If the kilometer reading on the vehicle is more than 250 km, the system condition "vehicle transport mode" is deactivated automatically and also can no longer be reactivated by XENTRY Diagnostics.
Variant coding
Using variant coding, the following vehicle versions and equipment, for example, can 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
- Driving on torque limitation
- Throttle valve calibration
- Boost pressure control (over wastegate)
- Regulated adjustment of the intake and exhaust camshafts
- ECO start/stop function (with CODE MJ7 (ECO start/stop function))
Fuel injection system
- Cylinder-selective DI
- Fuel high pressure control
- 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
- Altitude adaptation (integral pressure sensor in ME-SFI control unit)
- 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 statuses of the engine and the associated active sub-functions of the engine management are described in the following documents:
| Ignition, function | GF07.10-P-1023MNH | ||
| Starting, function | GF07.10-P-1001MNH | ||
| Fuel supply, function | GF07.10-P-1003MNH | ||
| Injection regulation, function | GF07.10-P-1004MNH | ||
| Ignition system function | GF07.10-P-1005MNH | ||
| Synchronize fuel injection and firing order function | GF07.10-P-1006MNH | ||
| Start, post-start phase and warm-up enrichment, function | GF07.10-P-1007MNH | ||
| Rpm control, function | GF07.10-P-1008MNH | ||
| Alternator interface function | GF07.10-P-1009MNH | ||
| Lambda control, function | GF07.10-P-1010MNH | ||
| Smooth running control, function | GF07.10-P-1011MNH | ||
| Thermal management, function | GF07.10-P-1012MNH | ||
| Torque coordination, function | GF07.10-P-1013MNH | ||
| Overrun mode fuel shutoff, function | GF07.10-P-1014MNH | ||
| Knock control, function | GF07.10-P-1015MNH | ||
| Camshaft adjustment, function | GF07.10-P-1016MNH | ||
| Engine limp-home mode, function | GF07.10-P-1019MNH | ||
| European OBD, function | GF07.10-P-1021MNH | ||
| ECO start/stop function engine management, function | Engine 176.9, 177.9 in model 463 as of model year 2019 with code MJ7 (ECO start/stop function) |
GF07.10-P-1042MNH | |
| Cylinder shutoff, function | Engine 177.9 in model 463 as of model year 2019 |
GF07.61-P-3033MNH | |
| Charging, function | GF09.00-P-2000MNH | ||
| Exhaust treatment function | GF14.00-P-3000MNH | ||
| Electronic accelerator function | GF30.20-P-3015MNH | ||
| On-board refueling vapor recovery function | Engine 176.9, 177.9 in model 463 as of model year 2019 with code ZU8 (National version for USA) |
GF47.10-P-3004MNH | |
| Purging function | GF47.30-P-3015MNH | ||
| Purge system with leak test, function | Engine 176.9, 177.9 in model 463 as of model year 2019 with code ZU8 (National version for USA) |
GF47.30-P-3017MNH | |
| Overview of system components for gasoline injection and ignition system with direct injection | GF07.70-P-9998MNH |