29
Matching
The procedure for matching the gearbox control
unit is similar to the procedure for matching the
engine control unit.
Furthermore, the gearbox is able to accept a new
identity. If a key is stolen and the complete key set is
replaced, all control units integrated into the
immobiliser can assume a new identity.
The immobiliser still has the type designation
"Immobiliser 4", because it uses the same
technology as in the A8 '03.
Response to non-matched control unit
If only the gearbox control unit is not matched, can
the engine can be started in the usual fashion. The
gearbox control unit detects the missing or false
immobiliser information. This is indicated to the
driver by an inverted selector lever position
indicator on the centre display of the dash panel
insert. If a new control unit is used, the vehicle can
be operated in an emergency mode with a
maximum speed of approx. 20 kph, provided that
the control unit has not previously been matched to
any other vehicle.
If the control unit has already been installed in
another vehicle, emergency operation will not be
possible. The selector lever can be engaged by the
driver. However, the control unit will prevent tractive
power from flowing to the output shaft. As with
other immobiliser components, it is only possible to
match such a control unit in a vehicle of the same
model, i.e. a gearbox which has already been
matched to an A8 cannot be matched to an A6.
multitronic
The 01J gearbox has no mechanical emergency
running mode. The modifications to the immobiliser
relate only to the software and certain electronic
components in the gearbox control unit.
6-speed automatic gearbox
In the case of the 09L and 09E gearboxes, the
hydraulic control unit was modified in addition to
the software and the hardware so that there is no
power transmission when deenergised. To achieve
this, the characteristics of several electric pressure
control valves have been inverted.
Gearbox modifications
325_051
325_071
