Online Demo / Manual - Generic
(Simulation will only work if you
Corresponds to 1551/1552 Address Word
33 or "OBD" on a VAS 5051/5052
Generic OBD-II functionality.
Because many of VW's recent factory repair manuals no longer have
traditional 01-Engine "On Board Diagnostic" information and have
replaced it with "Generic Scan Tool" data, this has become much more
important than it was in the past. Click the "Mode"
buttons in the screen-shot above for an interactive demo.
Each Generic OBD-II mode is defined by SAE
J1979 - the specification paper is available from:
http://www.sae.org Below is a
brief overview of what each Mode does, refer to a
Factory Repair Manual
for specific information and testing steps.
Read Data allows
you to view real-time emissions-related sensor and
status data reported by the ECU.
sample rate can be sped up considerably by using the
button and by checking No wait for 2nd controller.
Since Generic OBD-2 can request the same information
from both the Engine and Auto Trans, it may cause
unneccessary delay for Engine readings if you aren't
concerned about data from the Auto Trans.
Readiness shows the
status of each of the emissions systems monitored by
Freeze Frame shows
the conditions present when an emissions-related fault
Current DTCs shows
the present emissions-related fault(s). VCDS gives you
a checkbox to convert the code description into VW/Audi-specific
Clear DTCs erases
both Current and Pending DTCs. It does not repair the
condition that caused them. It will reset Readiness
as well, meaning the ECU will have to test monitored
systems again before the corresponding bits read
O2 Sensors shows
the data associated with each O2 sensor, chosen from a
Non cont. tests
will run a pre-defined set of tests for various
emissions-related components, for example O2 sensor
Pending DTCs are
fault codes that have been identified by the ECU but
are deemed not yet critical enough to trigger the MIL.
Vehicle Info can
store information including the VIN, calibration
versions, and tracking information. The quantity of
info varies wildly between cars.
Permanent DTCs are
faults so severe that they cannot be erased with a
scan tool, only by the ECU itself when it has tested
and confirmed that the problem has been repaired.
is able to
graph generic OBD-2 Mode 1 data:
Generic OBD-II functionality is "Supported"
only on VW, Audi, Seat, and Skoda cars. It will
likely work on many other brands of cars. We'd be happy
to receive feedback as to what other brands and models of cars it
does and does not work on, however, we do not feel obligated to make
it work on other manufacturer's cars.
Generic OBD-II functionality is limited to
cars using ISO 9141-2 ("CARB"), ISO 14230 ("KWP-2000") and ISO-15765
("CAN") protocols. None of our interfaces
support the SAE J1850-VPW and J1850-PWM protocols used by most
US-market pre-2008 GM and Ford products, so VCDS cannot work at all
on those cars.
Most early (1996-2000) OBD-II compatible Chrysler cars used the
ISO-9141-2 while many 2001-2007 Chrysler cars use the incompatible SAE-J1850
standard. Most European and Asian
cars use ISO or CAN and should be compatible. Generic OBD-II
compatibility was required as of model year
1996 in the USA, model year 1998 in Canada, and 2001 (gasoline) or
2004 (diesel) for in the European Market. All 2008 and newer
vehicles sold in the US are required to use CAN-Bus diagnostics for
Generic OBD-II so it shouldn't hurt to try this function on any
Interfaces: Our HEX+CAN
interfaces support ISO 9141-2 ("CARB"), ISO 14230 ("KWP-2000") and
ISO-15765 ("CAN") protocols. Our non-CAN HEX-,
KEY-, and KII- series interfaces support ISO 9141-2 ("CARB"), ISO
14230 ("KWP-2000"), but do not support
ISO-15765 ("CAN"). Our Micro-CAN interface support
ISO-15765 ("CAN"), but do not support ISO 9141-2
("CARB") or ISO 14230 ("KWP-2000") for generic OBD-II.
The ISO-15765 ("CAN") protocol was introduced in a few
cars in model year 2004 and became universally required in all cars
sold in the US market for model year 2008.
Please see the FAQ
What's the difference between VAG-COM and an OBD-II