(Gasoline Injection And Ignition System With Direct Injection, Function - GF07.70-P-0002MMK)
ENGINE 276.9 in MODEL 222
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 276.9 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 overview for engine 276.9:
| Sales designation | Model | Engine | Transmission | Engine management | Notes |
|---|---|---|---|---|---|
| Model series 222 | |||||
| S 400 HYBRID | 222.057 (Sedan) | 276.960 | 724.206 | MED 17.7.3 | Model designation up to model year 2016 |
| S 400 H | 222.057 (Sedan) | 276.960 | 724.206 | MED 17.7.3 | Model designation as of model year 2016 |
| S 400 HYBRID | 222.157 (LWB sedan) | 276.960 | 724.206 | MED 17.7.3 | Model designation up to model year 2016 |
| S 400 H | 222.157 (LWB sedan) | 276.960 | 724.206 | MED 17.7.3 | Model designation as of model year 2016 |
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
- European On-Board Diagnosis
- Diagnosis via CAN
- CAN network
- Flash programming
- Variant coding
- Drive authorization system 4 (DAS 4)
- 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.
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 via the connected drive train CAN and engine CAN which are integrated into the CAN network.
The ME-SFI [ME] control unit is also connected to the drive train LIN (LIN C1) and exchanges data over it.
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 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 control
- Throttle valve calibration
- Intake manifold switchover (selector drum and resonance flaps)
- Regulated adjustment of the intake and exhaust camshafts
Fuel injection system
- Cylinder-selective DI
- Start, post-start phase and acceleration enrichment
- Warm-up control
- Idle speed control
- Limp-home function
- A/C rpm increase
- 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-1000MMK | ||
| Starting, function | GF07.10-P-1001MMK | ||
| Ignition OFF, function | GF07.10-P-1002MMK | ||
| Fuel supply, function | GF07.10-P-1003MMK | ||
| Injection regulation, function | GF07.10-P-1004MMK | ||
| Ignition system function | GF07.10-P-1005MMK | ||
| Synchronize fuel injection and firing order function | GF07.10-P-1006MMK | ||
| Start, post-start phase and warm-up enrichment, function | GF07.10-P-1007MMK | ||
| Rpm control, function | GF07.10-P-1008MMK | ||
| Alternator interface function | GF07.10-P-1009MMK | ||
| Lambda control, function | GF07.10-P-1010MMK | ||
| Smooth running control, function | GF07.10-P-1011MMK | ||
| Thermal management, function | GF07.10-P-1012MMK | ||
| Torque coordination, function | GF07.10-P-1013MMK | ||
| Deceleration fuel shutoff, function | GF07.10-P-1014MMK | ||
| Knock control, function | GF07.10-P-1015MMK | ||
| Camshaft adjustment, function | GF07.10-P-1016MMK | ||
| Intake manifold switchover, function | GF07.10-P-1017MMK | ||
| Engine limp-home mode, function | GF07.10-P-1019MMK | ||
| On-board diagnosis, function | GF07.10-P-1020MMK | ||
| Engine timing start-stop function | GF07.10-P-1041MMK | ||
| Exhaust treatment function | GF14.00-P-3000MMK | ||
| Electronic accelerator function | GF30.20-P-3015MMK | ||
| Purging function | GF47.30-P-3015MMK | ||
| Overview of system components for gasoline injection and ignition system with direct injection | GF07.70-P-9998MMK |