The various computers in the car are
called "Control Modules" or "Controllers". On this screen, you select which Control
Module you want to "talk" to. Note:
Your car will not have all the Control Modules listed in VCDS, only
the ones on the Applications
Page for your car. Newer cars have more, older cars have fewer.
Each tab on the top
of this screen contains a number of different controllers grouped by
In CAN based
cars that have a proper Gateway supporting an Installation List,
VCDS will automatically populate one or more Installed tabs
containing buttons for only those control modules that are actually
installed in the car. It does take about 1.5 seconds to get the list
from the Gateway, so a bit of a delay when clicking
normal/expected. When used on a car which does not have a Gateway that
supports an Installation List, the old-style
Common tab will still be
shown. For customers who use VCDS primarily on older cars which do
not have an Installation List available, this feature can be disabled on
the User Interface and Identification tab of the Options screen.
The other tabs are: Drivetrain,
Chassis, Comfort/Conv, Electronics 1, Electronics 2, and LT3.
The LT3 is Volkswagen "Light Truck" that is not sold in North America.
In these vans, typically only the Engine, Immobiilizer and Central Locks
are VW. The rest of the components are supplied by Mercedes but they do
not use the normal Mercedes diagnostic tools. Please see the
for more information.
Each controller is listed as a number and a description, i.e.,
number corresponds to the controller number that you'd find in your
Factory Repair Manual in the instructions for using a VAG-1551 or other
factory diagnostic tool.
To establish communications with a particular Control Module, simply
click on the appropriate button.
You can also enter any
address manually. Simply put in the address and click
To return to the Main Screen, click
In this demo, any Controller you click will take
you to the Engine controller. Examples screens for functions may be
from various different Controllers (Engine, Airbags, Instruments).