VAG EDC15P.pdf

VAG EDC15P

A detailed description for Bosch EDC15P ECUs used in VAG cars

Document created by Dilemma 2012

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Table of content

Introduction ........................................................................................................................................ - 3 -

Hardware ............................................................................................................................................ - 4 -

Overview of the board ..................................................................................................................... - 4 -

Main CPU: Infineon C167 ................................................................................................................. - 5 -

Flash eprom: Am29F400 .................................................................................................................. - 6 -

ECU Pinout ...................................................................................................................................... - 7 -

Software.............................................................................................................................................. - 9 -

Software information data............................................................................................................. - 11 -

Reading the code........................................................................................................................... - 11 -

Maps and variables............................................................................................................................ - 12 -

Getting the map addresses ............................................................................................................ - 12 -

Validating the entries in the collection........................................................................................... - 12 -

Labelling the maps......................................................................................................................... - 13 -

Tuning EDC15P .................................................................................................................................. - 14 -

Communication with the ECU ............................................................................................................ - 20 -

Connection diagram ...................................................................................................................... - 20 -

KWP1281....................................................................................................................................... - 20 -

Wakeup procedure for normal mode............................................................................................. - 20 -

Appendix I: Building a high speed K-line interface.............................................................................. - 21 -

Schematic...................................................................................................................................... - 21 -

Parts information .......................................................................................................................... - 21 -

Document created by Dilemma 2012

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Introduction

The Bosch EDCxx series (Electronic Diesel Control) ECUs is a widely used system for modern diesel

engines. It is used by BMW, VAG, Opel, SAAB and many others. This document and the described VAG

EDC15P suite software will only focus on the Volkwagen Audi Gruppe (VAG) specific implementations in

the EDC15P models. These ECUs are used in the PD engines (Pumpe Duse) from Volkswagen, Audi,

Skoda and Seat. Other EDCxx ECUs may work in a similar fashion but will differ in certain areas.

The document describes the EDC15P ECU in detail. It will first describe the hardware and proceed with a

even more detailed description of the software that is running in the ECU so that we can learn how to

tweak and tune the ECU to match the hardware – altered or not – that is on the car better.

Special thanks for getting all this together go out to rkam, mtx-electronics, Pixis5 and others on

ecuconnections.com and chiptuners.org.

Document created by Dilemma 2012

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Hardware

Overview of the board

The ECU contains a multi-layer printed ciruit board (PCB) which holds a lot of SMD components. The

main component are – logically: Main CPU, Flash program storage, SRAM memory (working memory),

EEPROM (for storing mileage, immo etc) and a lot of input/output (I/O).

Document created by Dilemma 2012

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Main CPU: Infineon C167

 16 bit CPU

Datasheet documents

http://trionic.mobixs.eu/EDC15P/c167cr_ds.pdf

http://trionic.mobixs.eu/ EDC15P /c167cr_um.pdf

Document created by Dilemma 2012

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