This function scans each controller in the vehicle to
retrieve controller information -- Part Numbers, Component number, Soft. Coding, WSC, and Fault codes.
First, you must Select Chassis: There are dozens of different control modules that exist
across the entire range of VW/Audi vehicles. No one car has all
Modules! Newer cars have more, older cars have fewer. Because of
this, you must select a Chassis Type that contains only those
modules that are plausible for a given chassis. There are some
exceptions but in general, the Chassis Type is the 7th and
8th digits of the VIN number. For example WAUZZZ4F36N111022
has 7th and 8th digits of 4F and is a "4F,Audi
You can use the Search box to narrow down the choices for example by typing in "touareg". For additional help determining chassis type, see our
Vehicle Application Charts.
If you select Auto Detect
(CAN Only) as the Chassis Type on newer cars
which have a fully CAN-based diagnostic system, VCDS can
automatically determine which modules are installed in a
particular car and perform an Auto-Scan of exactly those
modules. This can make the Auto-Scan considerably faster.
There is a file in the VCDS directory called MyAutoScan.TXT, which can be edited by simply
clicking on the hyperlink above the Chassis Type selection. This will open the file in your default Text editor (like Notepad) to create a custom profile for your vehicle. To
help you figure out which controllers are in your car, you can run the
Control Module Finder.
The UDS Aggressive Mode box is checked by default. In this mode VCDS will try to retrieve all fault codes, even ones that may not be shown by the factory scan tool, depending on which mode the factory technician is using. You can uncheck this box to more closely correlate your results with what would be seen by the factory scan tool in "Self Diagnostics" mode compared to their more aggressive checking in "Guided Fault Finding" mode.
The Display Freeze Frame Data checkbox adds Freeze Frame data for Fault Codes on control modules using the KWP-2000 protocols.
Note: Not all control modules support this freeze-frame data.
As a rule of thumb, cars which were re-designed after 2003 will likely have some control modules which support it, and older designs will not.
There's no harm in leaving this enabled in any case.
However, un-checking it can make the results less cluttered in a scan which contains many fault codes.
This begins the Auto-Scan. Beware; this process can take several
scan is running, VCDS will cycle through the
Open Controller and
Fault Code screens
for each controller before returning to the Auto-Scan screen.
On newer control modules which have
different Hardware and Software part numbers, Auto-Scan includes the
Hardware Part Number as shown in the screenshots. The AutoScan also shows the applicable ROD files (used by UDS modules) and Label Files.
If you see a * in front of the label (for example Labels:* 4G0-919-158.clb), it means there is only
experimental Coding for this module. If you see a . in front of the label (for example Labels:. 4H0-920-xxx-17.clb) it means theres is only Coding from the label available. If you see a | in front of the label (for example Labels:| 4H0-959-655.clb) it means theres is both Coding from the label as well as
experimental Coding available (which requires a HEX-NET or HEX-V2 interface). If you see nothing between the colon and the label name (for example Labels: 4H0-959-655.clb) it means there is no Long Coding info in the label file or experimental coding.
Once the scan completes,
double-clicking on any of the Control
Modules highlighted in RED will open
the Fault Codes screen for that controller and allow you to clear the
[Stop] This stops the Auto-Scan.
Installation List] Only available only on Gateways in cars
using a direct CAN connection for diagnostics. This function is also
accessible from the Applications
Screen. This very fast function takes about 3 seconds to
query the car's Gateway to find out what modules are installed in the
car and what their status is. Any modules having fault codes should
show a "Malfunction" and will be
highlighted in RED. Modules are directly accessible from this
screen by double clicking on the appropriate line. Changes
to the Gateway Installation List can be made using the
Gateway Coding function. The following
screen-shot is from an Audi A6 (C6/4F):
The Auto-Refresh box
can be handy because it can show when a fault code appears in a
[Clear All DTCs]
This function is only available
when using a
HEX Interface and is implemented in
two ways. On pre-CAN vehicles, VCDS will access each
control module and clear DTCs from each one individually. On
using CAN for diagnostics, VCDS performs this function
without accessing all the control modules individually if
the Use CAN Command box is checked. If you
are not using a HEX Interface then you'll need to go into each module
that has faults to clear them individually. This function is also
accessible from the Applications
Screen. The following warning will pop up:
The VIN should be
retrieved automatically from all cars which "know" their VIN.
Also in control modules that provide it, engine codes and Jxxx component
identifiers are shown as well.
If you close the Auto-Scan
dialog, any data in its output box will be lost. If you would like to
keep a record, click the [Copy]
button first, then you can paste the results
into the application of your choice, such as MS Word or Notepad. Update: VCDS now has a Scans folder (typically C:\Ross-Tech\VCDS\Scans ) that should save a copy of the Scan even if you don't explicitly Save or Copy it anywhere. "Even if you don't believe in Saving Auto-Scans, Auto-Scans believe in saving you!" :-) We still recommend you save scans somewhere so they don't get lost in computer moves or updates.
[Print] This function sends the
results to your printer.
otherwise noted, all content on this site is Copyright (c) 2000-2021 by
Ross-Tech LLC. All rights reserved. "VCDS", "VCDS-Mobile" and
"HEX-NET" are Registered Trademarks of Ross-Tech, LLC.
Ross-Tech is not affiliated with the Volkswagen Group in any way.