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

GF07.70-P-0002MMI Gasoline Injection and Ignition System With Direct Injection, Function
ENGINES 152.9 in MODEL 172.4





Block diagram

A1 Instrument cluster
A1e4 Fuel reserve indicator lamp
A1e58 Engine diagnosis indicator lamp
A1p13 Multifunction display
A16/1 Knock sensor 1
A16/2 Knock sensor 2
A16/3 Knock sensor 3
A16/4 Knock sensor 4
B4 Fuel level indicator sensor
B4/3 Fuel tank pressure sensor (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
B17 Intake air temperature sensor
B28/7 Pressure sensor downstream of throttle valve
B37 Accelerator pedal sensor
B40 Oil sensor (oil level, temperature and quality)
B64/1 Brake vacuum sensor
B70 Crankshaft Hall sensor
CAN B Interior CAN
CAN C Drive train CAN
CAN D Diagnostic CAN
CAN E Chassis CAN
G1 On-board electrical system battery
G2 Alternator
G3/3 Left oxygen sensor upstream of catalytic converter
G3/3b1 Left oxygen sensor element upstream of catalytic converter
G3/3r1 Left oxygen sensor heater upstream of catalytic converter
G3/4 Right oxygen sensor upstream of catalytic converter
G3/4b1 Right oxygen sensor element upstream of catalytic converter
G3/4r1 Right oxygen sensor heater upstream of catalytic converter
G3/5 Left oxygen sensor downstream of catalytic converter
G3/5b1 Left oxygen sensor element downstream of catalytic converter
G3/5r1 Left oxygen sensor heater downstream of catalytic converter

G3/6 Right oxygen sensor downstream of catalytic converter
G3/6b1 Right oxygen sensor element downstream of catalytic converter
G3/6r1 Right oxygen sensor heater downstream of catalytic converter
LIN 1 Instrument panel LIN
LIN C1 Drive train LIN
M1 Starter
M3 Fuel pump
M4/7 Combustion engine and air conditioning with integrated control fan motor
M16/6 Throttle valve actuator
M16/6m1 Actuator motor
M16/6r1 Actual value potentiometer 1
M16/6r2 Actual value potentiometer 2
N2/10 Supplemental restraint system control unit
N3/10 ME-SFI [ME] control unit
N10/1 Front SAM control unit with fuse and relay module
N10/1kJ Circuit 15 relay
N10/1kM Starter circuit 50 relay
N10/1kN Engine circuit 87 relay
N10/2 Rear SAM control unit with fuse and relay module
N22/7 Automatic air conditioning control and operating unit
N30/4 Electronic Stability Program control unit
N62/1 Radar sensors control unit (with code (233) DISTRONIC PLUS or with code (237) Active Blind Spot Assist)
N69/1 Left door control unit
N72/1 Upper control panel control unit
N72/1s50 ECO start/stop function button
N73 Electronic ignition switch control unit
N80 Steering column module control unit
N118 Fuel pump control unit
R48 Coolant thermostat heating element
S9/1 Stop lamp switch
S40/4 Cruise control lever
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 Diagnostic connector
Y3/8n4 Fully integrated transmission control control unit
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)
Y76/1 Cylinder 1 fuel injector
Y76/2 Cylinder 2 fuel injector
Y76/3 Cylinder 3 fuel injector
Y76/4 Cylinder 4 fuel injector
Y76/5 Cylinder 5 fuel injector
Y76/6 Cylinder 6 fuel injector
Y76/7 Cylinder 7 fuel injector
Y76/8 Cylinder 8 fuel injector
Y80/1 Left intake side cylinder shutoff valve
Y80/2 Right intake side cylinder shutoff valve
Y80/3 Left exhaust side cylinder shutoff valve
Y80/4 Right exhaust side cylinder shutoff valve
Y93/1 Left exhaust flap switchover valve
Y93/2 Right exhaust flap switchover valve
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 in an electrical combination with the sensors and actuators of engine 152 DE (Direct-Injection) the engine timing "MED 17.7.3".

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 timing. The engine timing 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 engine 152:





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

Diagnosis
For diagnostic purposes, the fault codes from the engine timing can be read off and deleted with Xentry Diagnostics, and specific diagnostic functions initiated.

Transport mode
In transport mode various functions of the engine timing are limited. More information is available in the function "Energy management".
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 diagnostic tester.

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 timing in the ME-SFI [ME] control unit is flash programmable, 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 Star Diagnosis software DVD.

Variant coding
Using variant coding the following vehicle versions and equipment can be coded using Xentry Diagnostics:
- 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
- Fan operation
- Calibration of throttle valve
- Controlled adjustment of the intake and exhaust camshafts
- Controlling of the engine start/stop, function
- Cylinder shutoff

Injection system
- Cylinder-selective DI
- Start, post-start phase and acceleration enrichment
- Warm running regulation
- Idle speed control
- Limp-home function
- Speed increase for air conditioning
- Inertia fuel shutoff
- Fuel pump required pressure specification
- Altitude adaptation
- Load change function
- Rpm limitation

Ignition system
- Single and multi-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 timing 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
^ Cylinder shutoff
^ engine timing, start/stop 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)