Volkswagen PASSAT - YEAR 2001 Manual page 47

The diagnosis interface (Gateway) is integrated
in the dash panel insert and has the following
tasks:
To transfer diagnosis data from the drivetrain
CAN bus and convenience CAN databus to
the K-wire so that they can be used by the
self-diagnosis. This is a basic requirement for
self-diagnosis of certain systems
(the memory seat does not have its own K-
wire, for example).
The Gateway must be informed of the CAN users
by means of the "Encode control units" function.
The address word for the Gateway control unit
is 19.
To facilitate communication/data exchange
between users of a databus and between
users of different databus systems.
All control units from the drive train are connected to
the drivetrain CAN bus (highspeed).
All control units for convenience systems are
connected to the convenience CAN bus and
infotainment CAN bus
(physically one databus = low-speed).
The transmission rates of CAN High-speed and
Low-speed are 500 kBaud and 100 kBaud
respectively, i.e. 500 000 bits or 100 000 bits are
transmitted per second.
The Electrics
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