Introduction | System Description | Schematics | Cancel Switch | Diagnostics ABS Information |
ABS - System Description : MY91-93 The main components
of the early ABS are outlined below. The revisions made for the 94 model
year are described in detail below
.
|
ABS - System Description : MY94-95 Revisions At some point
in time, Audi decided that the risk of someone blaming them for causing an
accident by allowing the driver to disable a safety feature such as ABS was
too much of a risk to continue with. For the 1994 model year, a number of
revisions were made to the ABS on the 80/90 series. The most significant
change was the deletion of the ABS cancel switch. In relation to this change,
there was no need for the combination relay. Finally the longitudional accelerometer
switch was also deleted.
The most significant enhancement to the later ABS was the inclusion of OBD capability. The ABS controller can communicate with the VAG1551 scan tool (or emulator) to report any stored diagnostic trouble codes (DTCs) and provide a group of data channels which can also be used for diagnostic purposes. The OBD capability does NOT support blink code outputs - only high speed comms with the scantool. The ABS control module and relays reside in the same locations as described for the earlier system... The later system has a different electrical schematic which will be linked here as soon as I get it. |
Last Updated 7th October 2002