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The EDC15 is a much used ECU in “semi-modern” diesel cars like golf 4 TDI from 2000 on. It is used in much more cars, but in the example’s i give i used a 150hp golf 4 TDI. Winols is used to change the maps. Some EDC15 ecu’s do have more software banks, in my case there were 2 banks of software. There is only one of the two active at a moment but i decided to change both banks. Some ecu’s have even 3 or 4 banks. So just to be sure, change all banks exact the same (Winols will do this automatically).
Preparations:
WinOLS Video+PDF Tutorial Download
What is ECU Map? How to Understand ECU Maps?
WinOLS Free Download for Win XP/Win 7 Installation
How to Make Checksums for ECU Files with WinOLS
Map explanations:
The different maps of the EDC-15 can be grouped in 2 groups. The fuel related maps and the turbo related maps. As the name says the fuel related maps control the quantity of injected fuel, and the turbo maps control the turbo pressure. All examples in this document are taken from an original VW Golf IV TDI PD 150hp.
Fuel related maps:
-Drivers Wish
-Torque limiter
-Smoke limiter
-Duration map
-(EGR map) not really a fuel map, but have to put it somewhere.
-Tuning the fuel maps:
Turbo related maps:
-Turbo map
-N75 map
-Boost limiter map
-Single value boost limiter
-Tuning the turbo maps
Fuel related maps
1.Drivers wish Map:
General:
This map shows the required injected quantity diesel into the engine depending on the RPM and the Throttle position. The output of this map is injected quantity (IQ) in mg diesel/stroke.
3D view of the drivers wish map
Factors & offsets:
All factors, offsets, axis descriptors and names are given by the pictures below.
The factor and offset from the map drivers wish
The properties of the X axis of the map drivers wish
The properties of the Y axis of the map drivers wish
2Torque limiter:
General:
This map limits the torque of the engine based on RPM and atmospheric pressure. The output of this map is also mg diesel / stroke.
3D view of the Torque limiter
Factors & offsets:
All factors, offsets, axis descriptors and names are given by the pictures below.
The factor and offset from the Torque limiter
The properties of the X axis of the Torque limiter
The properties of the Y axis of the Torque limiter
3Smoke limiter:
General:
This map limits the injected quantity based on RPM and inlet air. So if the drivers wish is 50mg,and there is only enough air to burn 45mg diesel, it won’t inject 50mg but limit injection at 45mg/stroke.
3D view of the Smoke limiter
Factors & offsets:
All factors, offsets, axis descriptors and names are given by the pictures below.
The factor and offset from the Smoke limiter
The properties of the X axis of the Smoke limiter
The properties of the Y axis of the Smoke limiter
4.Duration map:
General:
This map shows how much degrees engine rotation it takes to achieve the amount of fuel injected. So this is a “calibration” map. Often there is more than one duration map, in case of the 150hp tdi even 4. There are 4 maps for different coolant temperatures etc.
3D view of the Duration map
Factors & offsets:
All factors, offsets, axis descriptors and names are given by the pictures below.
The factor and offset from the Duration map
The properties of the X axis of the Duration map
The properties of the Y axis of the Duration map
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