GF07.70-P-0002MMC Gasoline Injection and Ignition System With Direct Injection, Function

GF07.70-P-0002MMC Gasoline Injection and Ignition System With Direct Injection, Function
ENGINES 157.9 in MODEL 216.3, 221.0 /1
ENGINES 278.9 in MODEL 216.3, 221.0 /1





Block diagram

A1 Instrument cluster
A1e4 Fuel reserve indicator lamp
A1e54 Coolant temperature warning lamp
A1e58 Engine diagnosis indicator lamp
A1p13 Multifunction display
A29/1 Front knock sensor (left side of engine)
A29/2 Rear knock sensor (left side of engine)
A30/1 Front knock sensor (right side of engine)
A30/2 Rear knock sensor (right side of engine)
B4/1 Left fuel level sensor
B4/2 Right fuel level sensor
B4/3 Tank pressure sensor (B4/3) (with code (494) USA version)
B4/7 Fuel pressure sensor
B4/25 Fuel pressure and temperature sensor
B6/4 Left intake camshaft Hall sensor
B6/5 Right intake camshaft Hall sensor
B6/6 Left exhaust camshaft Hall sensor
B6/7 Right exhaust camshaft Hall sensor
B11/4 Coolant temperature sensor
B11/15 Cooler sensor for engine diagnosis (on engine 278, with code (494) USA version and code (917) Partial zero emission vehicle USA)
B17 Intake air temperature sensor
B28/4 Pressure sensor downstream of air filter, left cylinder bank
B28/5 Pressure sensor downstream of air filter, right cylinder bank
B28/6 Pressure sensor upstream of throttle valve actuator
B28/7 Pressure sensor downstream of throttle valve actuator
B37 Accelerator pedal sensor
B40 Oil sensor (oil level, temperature and quality) (with engine 157)
B64/1 Brake vacuum sensor (vehicles with code (B03) ECO start/stop function)
B70 Crankshaft Hall sensor
CAN B Interior CAN
CAN C Drive train CAN
CAN D Diagnostic CAN
CAN E Chassis CAN
CAN F Central CAN
G1 On-board electrical system battery
G2 Generator

G3/3 Left O2 sensor upstream of CAT
G3/4 Right O2 sensor upstream of CAT
G3/5 Left O2 sensor downstream of CAT
G3/6 Right O2 sensor downstream of CAT
L6/1 Left front rpm sensor
L6/2 Right front rpm sensor
L6/3 Left rear rpm sensor
L6/4 Right rear rpm sensor
LIN C1 Drive train LIN
M1 Starter
M3 Fuel pump
M4/7 Engine and AC electric suction fan with integrated control
M16/6 Throttle valve actuator
M44 Charge air cooler circulation pump

N2/7 Restraint systems control unit
N3/10 ME-SFI [ME] control unit
N10/1 Front SAM control unit with fuse and relay module
N10/1kC Circuit 87 relay, engine
N10/1kD Circuit 15 (2)/spare 1 relay (changeover contact)
N10/1kH Circuit 50 relay, starter
N10/2 Rear SAM control unit with fuse and relay module
N10/2kQ Circulation pump relay
N22/1 AAC [KLA] control unit
N47-5 ESP control unit
N51 AIRMATIC with ADS control unit (for code (489) AIRMATIC (air suspension with continuous adjustment damping)
N62/2 Video and radar sensor system control unit (with code (233) DISTRONIC PLUS, with code (237) Active Blind Spot Assist, with code (238) Active Lane Keeping Assist), N69/1 Left door control unit (model 216) or left front door control unit (model 221)
N72/1 Upper control panel control unit
N73 EIS [EZS] control unit
N80 Steering column module
N93 Central gateway control unit
N118 Fuel pump control unit
R48 Two-disk thermostat heating element
S9/1 Stop lamp switch
S40/4 CC [TPM] switch
S43 Oil level check switch (for engine 278)
S62 ATA [EDW] engine hood switch (with code (551) Anti-theft alarm system (ATA [EDW]))
T1/1 Cylinder 1 ignition coil
T1/2 Cylinder 2 ignition coil
T1/3 Cylinder 3 ignition coil
T1/4 Cylinder 4 ignition coil
T1/5 Cylinder 5 ignition coil
T1/6 Cylinder 6 ignition coil
T1/7 Cylinder 7 ignition coil
T1/8 Cylinder 8 ignition coil
X11/4 Data link connector
Y3/8 Electric control unit (VGS)
Y16/2 Heating system shutoff valve up to 05/2011
Y49/4 Left intake camshaft solenoid
Y49/5 Right intake camshaft solenoid
Y49/6 Left exhaust camshaft solenoid
Y49/7 Right exhaust camshaft solenoid
Y58/1 Purge control valve
Y58/4 Activated charcoal filter shutoff valve (with Code (494) USA version)
Y77/1 Boost pressure regulator (boost pressure control pressure transducer)
Y76y1 Cylinder 1 fuel injector
Y76y2 Cylinder 2 fuel injector
Y76y3 Cylinder 3 fuel injector
Y76y4 Cylinder 4 fuel injector
Y76y6 Cylinder 6 fuel injector
Y76y7 Cylinder 7 fuel injector
Y76y8 Cylinder 8 fuel injector
Y93 Exhaust flap switchover valve (for model 221 with engine 278)
Y94/1 Left quantity control valve
Y94/2 Right quantity control valve
Y130 Engine oil pump valve

Gasoline injection and ignition system with direct injection, general points
The gasoline injection and ignition system with DI creates the engine timing "MED 17.7.3" in an electrical combination with the sensors and actuators of engines 157 AMG and 278 DE (Direkt-E inspritzung).

The abbreviated designation MED 17.7.3 means:M = Motronic
E = Electronic accelerator pedal
D = Direct injection
17.7.3 = Version 17.7.3

The ME-SFI [ME] control unit contains the whole engine control.
The engine control 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 engines 157 and 278:





The engine control 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 3 (DAS 3)
- Torque coordination
- Heat management
- Alternator interface
- Maximum vehicle speed limit

Diagnosis
For diagnostic purposes, the Diagnosis Assistance System (DAS) can be used to read out and delete the engine control fault codes, and to actuate certain specific diagnostic functions.

CAN network
The ME-SFI [ME] control unit exchanges data with other control units via the connected drive train CAN and chassis CAN which are 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 control in the ME-SFI [ME] control unit is flash programmable, that is the complete software in the control unit can be replaced using the DAS (installed new). The software required for control unit programming can be found on the Star Diagnosis Update DVD.

Variant coding
The following vehicle versions and equipment are examples of items that can be coded with the DAS using variant coding:
- Vehicle model
- National version
- Exhaust variants
- Transmission version

Engine system
- Start relay actuation
- Throttle valve control
- Safety fuel shutoff
- Transmission overload protection
- Support for Electronic Stability Program (ESP)
- Support for fully integrated transmission control (VGS)
- Starting torque limitation
- Suction fan actuation
- Calibration of throttle valve
- Controlled adjustment of the intake and exhaust camshafts
- Charge pressure control
- Control of the engine start/stop function (for code (B03) ECO start/stop function)

Injection system
- Cylinder-selective DI (homogeneous mode)
- Start, post-start phase and acceleration enrichment
- Warm running regulation
- Idle speed control
- Limp-home function
- Increasing the rotational speed for an activated A/C
- Inertia fuel shutoff
- Fuel pump control
- Altitude adaptation
- Load change function
- Rpm limitation

Ignition system
- Single spark ignition
- Ignition map
- Rpm limitation
- Knock sensor system
- 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 control 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
^ Engine limp-home mode, function
^ On-board diagnosis, function
^ Engine start/stop function (for code (B03) ECO start/stop function)
^ Forced induction, 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)