Thread: KW1281 OBD Diagnostic Tool / FUSE Driver

Hi,

last days i've played around with VAG Diagnostic, and created some fuse interface.

features:
* read controler info
* read dataGroups
* read controler errorstorage
* reset controler errorstorage
* read (some) dataWords

It's not finished yet, but working with the 2000' audi tt cluster on my table

what you need:
* amd64 linux with fuse support (ask for x86 version, if you want to test it before source release)
* obd diagnostic cable which supports kw1281 and is supported by linux, most cheap cables comes with ftdi rs232 converter and work fine (search amazon.com for B007PACPYW, costs about 10$)



USE AT YOUR OWN RISK
it is possible to modify data by the kw1281 protocol, functions are not implented, but bugs can come to features... (i don't think so, but be warned)

installation, do this as root!

Code:

# cd /tmp
# wget http://www.royal-society.us/carosOBD.tgz
# tar xzvf carosOBD.tgz
# mv carosOBD/carosOBD /usr/bin
# mkdir /usr/share/caros
# mv carosOBD/obd_dtc* /usr/share/caros
# mv carosOBD/caros.obd /etc
# rmdir carosOBD

edit /etc/fstab and add some line like this:

Code:

carosOBD#/dev/ttyUSB0	/tmp/obd		fuse		user,noauto,noatime 0 0

ttyUSB0 change this to your serial device
/tmp/obd change this to your prefered mount path (keep sure the directory exists)

now you can test it:
# mkdir /tmp/obd
# mount /tmp/obd
# cat /tmp/obd
should return:

Code:

airbags  brakes  climatronic  cluster  comfort  ecu  synced_with_id

now you can test, try to get controler info with:

Code:

# cat /tmp/obd/cluster/info

result:

Code:

part-id: 8N1919880E  
component: KOMBI+WEGFAHRS. M73 D30

read errorcodes from the controlers:

Code:

# cat /tmp/obd/cluster/errors
# cat /tmp/obd/ecu/errors

result:

Code:

(00771-030) Kraftstoffanzeige-sensor -G - Stromkreisunterbrechung/Kurzschluss gegen Plus
(00779-030) Außenlufttemperaturgeber -G17 - Stromkreisunterbrechung/Kurzschluss gegen Plus
(01128-035) Lesespule Wegfahrsperre - 
(01176-007) Schlüssel - Signal zu schwach.
(01176-193) Schlüssel - Nicht befugt

remove errors from controler

Code:

# echo true > /tmp/obd/cluster/errors_reset

result:

Code:

returns nothing if success
returns something like "write error: Permission denied" if reset fails

or read dataGroups:

Code:

# cat /tmp/obd/cluster/dataGroups/1
# cat /tmp/obd/cluster/dataGroups/2
....
# cat /tmp/obd/cluster/dataGroups/256

result:

Code:

0x07 0x64 0x00
0x01 0xc8 0x00
0x25 0x00 0x1e
0x2c 0x0c 0x0d

known dataWords for controllers will be added soon
(you can for now read some cluster datawords)

Code:

# cat /tmp/obd/cluster/dataWords/*

should return something like this:

Code:

duty_cycleA: 4%
duty_cycleB: 0%
mileage: 53240km
mileage_trip: 0km
oilpressure: 0
resistor: 300ohm
rpm: 0rpm
speed: 0km/h
tank: 0l
temp_cooling: 0
temp_out: -99

you have to read the related dataGroups first, this will be automated later, for cluster do this before you read the dataWords:

Code:

# cat /tmp/obd/cluster/dataGroups/1 && cat /tmp/obd/cluster/dataGroups/2

q&a
problem:
"error while loading shared libraries: libfuse.so.2"

solution:
try carosOBDx86-binary instead of carosOBD-binary


problem:
it hangs

solution:
kill it with:
# killall -9 carosOBD


problem:
controller xy isn't in the filesystem

solution:
edit caros.obd and add controller
adress id is decimal, so if cluster adress is 0x17, you have to add 23 to your configuration.


problem:
# carosOBD /dev/ttyUSB0 /tmp/obd
fuse: device not found, try 'modprobe fuse' first

solution:
as id says, try
# modprobe fuse
or/and check if fuse module is loaded
# lsmod | grep fuse


if it's not working you need a kernel with fuse support, if you know how to build your own, you can find fuse @file system support

suggestions for the tool are welcome

would be nice if someone can support me with language files of the error-/statuscodes