Technical data

66
Interfaces
Terminal 30 …
... is used for the control unit run-on.
Via terminal 30, control unit J554 and thus the
whole system (including J556) remains active
for approx. 30 seconds after ignition “OFF”.
Further information on control unit run-on
can be found on Page 55.
K wire
Communication for self-diagnosis between
control unit J554 and the diagnostic tester is
effected via the familiar K wire.
A new feature is the data message, i.e. the
communication language between the
control unit and diagnostic tester.
Instead of the existing protocol KWP 1281, the
controller communicates to the additional
shift stage using the new protocol KWP 2000.
To perform self-diagnosis, the V.A.G./VAS
diagnostic tester must be equipped with the
corresponding update.
Further information can be found in the
“Service/Self-diagnosis” chapter.
Additional shift stage