User manual ROSS TECH VAG-COM-DIAGNOSTIC SOFTWARE FOR VW & AUDI & SEAT & SKODA-MANUAL VERSION 3112C

[. . . ] VAG-COM Diagnostic Software for VW/Audi/SEAT/Skoda User's Manual Version 311. 2 See our Website for an Interactive Online version of this manual: http://www. ross-tech. com/vag-com/tour/ Copyright (c) 2000-2003 by Ross-Tech, LLC. 888 Sumneytown Pike Lansdale, PA 19446 www. Ross-Tech. com Disclaimer: All rights reserved, No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Ross-Tech, LLC. The information contained herein is designed only for use with VAG-COM. is not responsible for any use of this information as applied to this or other diagnostic equipment. [. . . ] If you're using a "dumb" interface, you must set the Start Baud on the Options Screen to 4800 to get these to work. If you have anything else in Starting Baud Rate, the ECU will "choke" and you'll need to turn the ignition OFF and back ON again before you can communicate. 1990-1993 VW Cabrio/Cabriolet Airbags These controllers do not communicate with VAG-COM. In fact, they do not communicate with Volkswagen's VAG-1552 scan tool either, unless the 1552 has an old, outdated program card installed. 1994-1997 C4 (A6/S6) Instrument Clusters These have a high bit-error rate. We suspect they use a software-UART and "stretch" bits sometimes. The error-detection/correction logic built into VAG-COM's low-level protocol drivers as of version 0. 70 seems to take care of this in a majority of cases, but I still had few reports of customers not being able to communicate with these clusters. In version 0. 75 or or newer, please ensure that Char Int on the Options Screen is set to approximately 3 (which is the default). On some PC's, it may be necessary to adjust this value to something other than 3. We have received reports from users who cleaned the terminals on the wiring connections at the back of their instrument cluster with electronics cleaner. This appeared to fix the problem with communicating with these clusters. 36 Appendix A: VAG-COM Problems & Issues cont. 1995-2000 VW Sharan Electrical Controller (address 09) These controllers have some strange bugs in the protocols which prevent them from working with VAG-COM. We've added one work-around to the low level protocol drivers that works in some, but not all Concerts, and it is not 100% reliable in any case. Some Concerts occasionally get "stuck" in an undesirable mode after attempting communications. If your Concert gets "stuck", the way to reset it is to remove all power from the radio for at least 10-15 seconds. This can be done by: · · · Removing the radio from the car. Disconnecting the car's battery Pulling the fuse for the radio. Note: Some radios will require you to enter the "security code" using the radio's front panel after loosing power. It appears that I suspect there is something not quite up to snuff in the Symphony's ability to drive the K-line. We've had some reports that they work better with non-optically isolated interfaces, and they may work better with the engine running (which means there is a higher voltage on the VBatt lines in the car). 1992-1994 2. 6L V6 Engine (non-US only) VAG-COM cannot communicate with some of these ECU's while using a "dumb" Interface. These ECUs (made by Hella) are so incredibly fussy about the protocol timing that there is no way to get them to work with a "dumb" interface and an application running in user-mode under Windows. For vehicles with these engines, we recommend the HEX-COM or HEX-USB Interface, which work great. 1996-1997 Audi A6 2. 8L 12V V6 Engine There is a bug in the Hitachi ECU that does not allow reliable monitoring or logging of multiple measuring groups. [. . . ] And next time you connect to the same controller, VAG-Scope will automatically remember your settings. A: This enables you to tell VAG-Scope the value of the horizontal shift (in pixels) each time a new sample is delivered by VAG-COM. This is customizable because of the range of sample rates you can experiment with VAG-COM: you can go from 10 samples per second on a '02 A4 3. 0Q (engine, 1 measuring block at a time) to 0. 4 on a Eurovan (transmission, 3 measuring blocks). The default is 3, but you may want to increase it if your sample rate is low. [. . . ]