2006 Alfa Romeo GT four wheel drive

GETTING TO KNOW YOUR CAR
129
SYSTEM ACTIVATION
IMPORTANTWhen the driver’s door is
opened the Selespeed starts the hydraulic
part of the system to prepare it for when the
engine is started. This function (noted by
the turning of the electric pump) is deacti-
vated after 10 door openings/closings not
followed by actual system activation turning
the ignition key.
Turning the ignition key to MAR, all the
segments on the display turn on (fig.
121) together with the gearbox failure
warning light (fig. 122) and the word
CITY. After about a second, the display
shows the gear engaged (N, 1, 2, 3, 4,
5, R); from this moment onwards, the Se-
lespeed system accepts gearshift com-
mands.
IMPORTANTIf after 10 seconds the dis-
play segments do not show the gear en-
gaged or the warning light stays on, turn the
ignition key to STOPand wait for the dis-
play to turn off, then repeat system switch
on. If the fault persists, contact Alfa Romeo
Authorised Services. With the gearbox in the CITYmode it is
still possible to carry out manual gearshift-
ing, both using the gear lever and the steer-
ing wheel controls. The gearbox remains in
theCITYmode.
The gear engaged (fig. 121) is always
signalled on the display regardless of the se-
lected mode.
N= neutral;
1= first gear;
2= second gear;
3= third gear;
4= fourth gear;
5= fifth gear;
R= reverse.During operation in the CITYorSPORT
mode, the selected mode is shown as well.
IMPORTANTTheSPORTmode can be
engaged only after disengaging the CITY
mode.
Failures of the Selespeed gearbox are sig-
nalled to the driver through a warning light
connected with the associated failure mes-
sage (fig. 122) and accompanied by an
acoustic signal.
The Selespeed considerably simplifies use
of the car, reducing the fatigue of city dri-
ving or when frequent gearshifting is re-
quired, at the same time offering brilliant
performance.
fig. 121
A0A9017g
fig. 122
A0A9081g

GETTING TO KNOW YOUR CAR
152
VDC SYSTEM
(Vehicle Dynamics Control)
(upon request for
versions/markets where
provided)
The VDC is an electronic system that con-
trols vehicle stability, intervening on the dri-
ving torque and braking the wheels in a dif-
ferentiated manner, in the lack of grip, it
helps to bring the car back to the correct
direction.
When travelling the car is subjected to lat-
eral and longitudinal forces which can be
controlled by the driver as long as the tyres
offer adequate roadholding; when this falls
below the minimum level, the car begins
to divert from the course required by the dri-
ver.
Especially when travelling on an uneven
surface (such as paving, or due to the pres-
ence of water, ice or soil), changes in speed
(acceleration or braking) and/or course
(bends or the need to avoid obstacles) may
cause the tyres to lose grip.When the sensors detect the conditions
that would lead to skidding, the VDC system
intervenes on the engine and on the brakes
producing a stabilising torque.
HOW THE VDC
SYSTEM WORKS
The VDC system is engaged automatical-
ly when the car is started and cannot be
switched off.
The basic components of the VDC system
are:
– an electronic control unit that process-
es the signals received from the various sen-
sors and brings about the most appropriate
strategy;
– a sensor that detects the position of the
steering wheels;
– four sensors that detect the turning
speed of each wheel;
– a sensor that detects rotation of the car
around its vertical axis;
– a sensor that detects lateral acceleration
(centrifugal force).
The heart of the VDC system is the VDC
control unit, which with the data supplied
by the sensors installed on the car calculates
the centrifugal forces generated when the
car is cornering. The yawing sensor, which
originates from the aeronautical industry, de-
tects the rotations of the car around its own
vertical axis. The centrifugal forces gener-
ated when the car is cornering are detect- The performance of the
system, in terms of active
safety should not induce
the driver to take pointless and un-
necessary risks. The style of dri-
ving must in any case always be
adapted to the conditions of the
road surface, visibility and traffic.
The responsibility for road safety
is always and in any case the dri-
ver’s.
The VDC system helps the driver to keep
the car under control in the event of a loss
of tyre grip.
The forces induced by the VDC system to
control the loss of vehicle stability always
depend on the grip between the tyre and
the road surface.

CORRECT USE OF THE CAR
208
It is necessary therefore to limit their use
to the purposes for which they are certified.
IMPORTANTWhen winter tyres are
used with a maximum speed index below
the one that can be reached by the vehicle
(increased by 5%), place a notice in the
passenger’s compartment, plainly in the dri-
ver’s view, which states the maximum per-
missible speed of the winter tyres (as per
CE Directive).
Fit the same type of tyre on all four
wheels (brand and profile) to ensure high-
er driving safety when braking and good
handling.
Remember that it is inappropriate to
change the direction of rotation of tyres. WINTER TYRES
These tyres are specially designed for dri-
ving on snow and ice, to be fitted in
replacement of those fitted on the car.
Use winter tyres of the same size as nor-
mal tyres provided on the car.
Alfa Romeo Authorised Services will be
pleased to advise you on the choice of the
tyre most suited to the use the Customer
intends to make of it.
For the type of tyre to be used, inflation
pressures and specifications of winter
tyres, follow the instructions given in the
“Technical Specifications” chapter.
The winter features of these tyres are
reduced considerably when the tread
depth is below 4 mm. In this case, they
should be replaced.
Due to the winter features, under normal
conditions of use or long motorway jour-
neys, the performance of these tyres is
lower than that of normal tyres.
SNOW CHAINS
Use of snow chains should be in compli-
ance with local regulations.
For versions 1.8 T. SPARK, 2.0
JTS and 1.9 JTD, tyre 195/60 R15 can
be fitted with snow chains (use snow chains
with reduced size with max. protrusion be-
yond the tyre profile of 12 mm), whereas
tyres 205/60 R15 - 205/55 R16 -
205/55 ZR16 - 215/45 R17 - 215/45
ZR17 - 225/40 ZR18 cannot be fitted with
snow chains.
On version 3.2
V6, tyres 215/45
R17” and 215/45 ZR 17” can only be fit-
ted with chains of the spiker spider type
whereas tyres 225/45 ZR17 - 225/40
ZR18 cannot be fitted with snow chains.
Snow chains SPIKES SPIDER COMPACT
(model 17003 compact) with 9 spikes with
16 mm adjustable length and 17 inch wheel
cap adapter are available at Lineaccessori
Alfa Romeo.
Snow chains should only be applied to
the drive wheels (front).
Before purchasing or using snow chains,
you are recommended to contact Alfa
Romeo Authorised Services.
Check the tensions of the chain after the
first few metres have been driven.