MSA15-Tuning-Guide.pdf

MSA-15

Written by: gunnar-tdi

Date: May 2010

Thanks to: Midas, tjwasiak, dieseljohnny, VectraDTI and Bar

For more info: www.ecuconnections.com

Revision: 1.0

Index:

Introduction

Map explanations

1. Drivers wish

2. Torque limiter

3. Smoke limiter

4. N146 Pump Voltage map

5. N108 Beginning of Injection map

6. EGR map

7. Tuning the fuel maps

Turbo related maps

8. Turbo map

9. N75 map

11. Single value boost limiter

12. Tuning the turbo maps

Conclusion

Fuel related maps

10. Boost limiter map

Introduction:

The MSA15 is a much used ECU in VP37 diesel cars like golf 3 TDI 110hp from 1996 on. It is

used in much more cars, but in the example's i give i used a 110hp Passat 3B TDI. Winols is used to

change the maps. Some MSA15 ecu's do have more software banks, in my case there were 4

banks of software. There is only one of the four active at a moment but i decided to change

all banks. Some ecu's have one or more banks. So just to be sure, change all banks exact the

same (Winols will do this automatically).

Map explanations:

The different maps of the MSA-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 Passat 3B AFN VP37 110hp ECU 028906021GL. with 0.216 nozzles!

Fuel related maps:

-Drivers Wish

-Torque limiter

-Smoke limiter

-N146 Pump Voltage map

-N108 Beginning of Injection map

-(EGR map) not really a fuel map, but have to put it somewhere.

Turbo related maps:

-Turbo map

-N75 map

-Boost limiter map

-Single value boost limiter

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.

Picture 1.1: 3D view of the drivers wish map.

Factors & offsets:

All factors, offsets, axis descriptors and names are given by the pictures below.

Picture 1.2: The factor and offset from the map drivers wish

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