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Online Demo / Manual - Generic
OBD-II Screen
Click the buttons in the screen-shot!
(Simulation will only work if you
have JavaScript enabled)
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. For now, we'll
let the screens speak for themselves. 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.
|
Mode |
Meaning |
|
1 |
Read Data allows
you to view real-time emissions-related sensor and
status data reported by the ECU. |
|
1-01 |
Readiness shows the
status of each emissions test. |
|
2 |
Freeze Frame shows
the conditions present when an emissions-related fault
last occurred. |
|
3 |
Current DTC's shows
the present emissions-related fault(s). VCDS gives you
a checkbox to convert the code description into VW/Audi-specific
ones. |
|
4 |
Clear DTC's erases
the Current and Pending DTC's, it does not repair the
condition that caused them. This may erase learned
Readiness as well. |
|
5 |
O2 Sensors shows
the data associated with each O2 sensor, chosen from a
drop-down menu. |
|
6 |
Non cont. tests
will run a pre-defined set of tests for various
emissions-related components, for example O2 sensor
aging tests. |
|
7 |
Pending DTC's are
fault codes that have been identified by the ECU but
are deemed not yet critical enough to trigger the MIL. |
|
9 |
Vehicle Info can
store information including the VIN, calibration
versions, and tracking information. The quantity of
info varies wildly between cars. |
|
10 |
Permanent DTC's 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. |
VC-Scope
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. Our interfaces do not
support the SAE J1850-VPW and J1850-PWM protocols used by most
US-market GM and Ford products, so this cannot work on those cars.
Most early (1996-2000) OBD-II compatible Chrysler cars used
ISO-9141-2. Many newer Chrysler cars use SAE-J1850 and
are incompatible. Most European and Asian
cars use ISO and should be compatible. In US
models, Generic OBD-II compatiblilty was required as of model year
1996. In Canada, 1998. In the European
Market, 2001 (gasoline-powered) and 2004 (diesel-powered).
Please see the FAQ
entry:
What's the difference between VAG-COM and an OBD-II
Scan-Tool?
Shareware Limitation(s): This
function is not available in shareware mode..
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