Today the deepening is focussed on a Ford Focus III RS and Ford Mustang VI 2.3L 16v Turbo EcoBoost equipped with Bosch MEDG17.0 ECU.

The engine has a direct injection system (GDI) with dual variable valve timing (intake and exhaust) and it’s completely produced in the Ford’s plant of Valencia, Spain. Both model, Focus and Mustang, equipped with the 2.3L EcoBoost are managed with a Bosch MEDG17.0 control unit.

 

 

 

What do you need to read the ECU?

ECU Details

Brand: Bosch
Model: MEDG17.0.
Microcontroller: Tricore IROM TC1797 TPROT
EEprom: Inside the microprocessor

 

 

KESSv2 - 414
- Read: YES
- Write: YES
- Checksum Correction: YES
- Cable: 144300KCAN

K-TAG - Bootloader Tricore - Plugin 618
- Read: YES
- Write: YES
- Checksum Correction: YES
- Direct Connection: 14P600KT02
- Connection using the positioning frame: 14P800ADBO, 14P600KT04, 144300T101

For automatic transmission vehicles, the MEDG17.0 ECU controls the gear-box directly. How do we know? Look at the torque limitation maps: they have a column for each gear and there are 4 sets of maps of this kind…Why an engine control unit should manage the gear-box? Discover it with us!

 

• Table view

 

The performance of the two vehicles are quite the same:

• Focus RS 2.3L EcoBoost 345BHP (350PS, 257KW, 350CV) @ 6000 RPM, 440 Nm @ 2000 RPM.
• Mustang 2.3L EcoBoost 312BHP (317PS, 233KW, 317CV) @ 5700 RPM, 420 Nm @ 3000 RPM.

The Focus, born in 1998 to meet the European market demand, in the previous RS (Racing Sport) versions was not afraid to show all its 345BHP. Not even onto the muddy roads of many World Rally Championships exactly with the WRC version.

 

 

Yeah, “it’s a dirty job but someone gotta do it!” and the new Focus does it very well thanks to the four available driving modes: Normal, Sport, Trak and Drifting and also through the Launch Control system that increases the torque limit in first gear.

Now we are at the third generation of Focus and it has undergone a small facelift at the beginning of 2016.

 

Where is the ECU?

The ECU is in the engine bay, front left side, in the wheel arch.

 

Mustang: a small coupé that over the years became bigger along the roads of America, making it a real “Muscle-car”. The latest 2015 version, the sixth compared to the first of 1964, with the 2.3L EcoBoost engine Mustang has the same features of the Focus RS.

 

 

Four gearbox settings for four driving modes: Normal, Sport, Track and Wet&Snow.

 

Where is the ECU? Look at the images!

 

 

Let’s compare the ECM Titanium Drivers for Ford Focus (46 maps) and Mustang (47 maps) both with the six-speed manual transmission.

 

Let’s discover something new on ECM’s Drivers

Engine Torque -> Torque request during take-off condition

The torque demand maps are also called Driver’s wish or Driver’s demand. They are the maps which manage the torque output based on engine speed [RPM] and the position of the accelerator pedal as percentage [% Acc]. To tune them means changing the engine response based on the accelerator pedal. For MEDG17.0 there is one map per gear of this kind (Manual Transmission) or one per each of the 4 gear-box settings (Automatic Transmission).

 

•  3D View

 

Injection System -> Injection correction f(ECT)

This map is used to adjust the target value of carburation “enriching” the air/fuel mixture according to the coolant temperature. The map is expressed as Lambda factor. So the more you decrease the value from Lambda 1, the “richer” is the mixture.

• Table view

 

The engine coolant temperature (ECT) is expressed as [°F].

 

Turbo System -> Limiter of Turbo pressure f(IAT)

Finally, we found them! There are several maps which are used to limit the boost pressure into the MEDG17.0 stock original file and they are expressed as air load [Load]. The one represented in the picture limits the Turbo pressure according to engine speed and the intake air temperature (IAT) that is expressed as [°F].

 

Remember that ECM Titanium and the related Driver files show the information stored inside the ECU file (maps, units, etc.) as the car manufacture specification or at least as accurately as possible. So don’t be surprised if the temperature units are expressed as Fahrenheit and not in Celsius degree. Ford is American.