2007 Alfa Romeo 156 spare wheel

GETTING TO KNOW YOUR CAR
180
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 detects
the rotations of the car around its own ver-
tical axis. The centrifugal forces generated
when the car is cornering are detected by
a highly sensitive lateral acceleration sensor.
The stabilising action of the VDC system is
based on calculations made by the
system’s electronic control unit which
processes the signals received from the
steering wheel rotation, lateral acceleration
and individual wheel rotation sensors. These
signals allow the control unit to recognise
the manoeuvre the driver intends to do
when turning the steering wheel.
The control unit processes the information
received from the sensors and is therefore
capable of detecting the position of the car
and comparing it with the trajectory the dri-
ver would like to follow instant by instant.
In the event of a discrepancy, the control
unit chooses and commands the most suit-
able action to bring the car back to the re-
quired course within a fraction of a second:
braking one or more wheels at a different
braking force and, if necessary it reduces the
power transmitted by the engine. The corrective actions are changed and con-
trolled continuously until the car returns to
the required course.
The action of the VDC system considerably
increases the active safety of the vehicle un-
der many critical situations and it is partic-
ularly useful also when the road surface grip
conditions change.
For the VDC, ASR and ABS
systems to work correctly,
the tyres must be of the same
brand and type on all wheels, in
perfect conditions and above all of
the specified type, brand and size.
WARNING
During use of the compact
spare wheel, the VDC sys-
tem continues working. It should be
borne in mind that the spare wheel
is smaller than a normal tyre,
therefore its grip is lower than that
of the other tyres of the car.
WARNING
VDC SYSTEM OPERATIONThe VDC system turns on automatically
when the car is started and cannot be
switched off. It is however possible to cut
off operation of the ASR system pressing the
corresponding button on the centre console.
The main components of the VDC system
are:
– an electronic control unit which
processes the signals received from the var-
ious sensors and brings about the most ap-
propriate strategy;
– a sensor that detects the position of the
steering wheel;
– four sensors that detect the rotation
speed of each wheel;
– a sensor that detects rotation of the car
around the vertical axis;
– a sensor that detects lateral acceleration
(centrifugal force).

CORRECT USE OF THE CAR
203
Keep your speed
down when snow
chains are fitted.
Do not exceed 50 km/h. Avoid
potholes, steps and pavements and
avoid also to drive for long dis-
tances on roads not covered with
snow to prevent damaging the car
and the roadbed.
VEHICLE INACTIVITYIf the car is to be left inactive for long pe-
riods, the following precautions should be
noted:
– House the vehicle under cover in a dry
and possibly ventilated place.
– Engage a gear.
– Check that the handbrake is not en-
gaged.
– Clean and protect the painted parts us-
ing protective wax.
– Disconnect the negative terminal (–)
and check the battery charge. This check is
to be repeated every three months.
Recharge if the optical indicator shows a
dark colour without the central green area.
WARNINGWhere applicable, switch off
the electronic car alarm with the remote con-
trol.– Clean and protect the shiny metal parts
using special compounds readily available.
– Sprinkle talcum powder on the rubber
windscreen and rear window wiper blades
and lift them off the glass.
– Slightly open the windows.
– Cover the car with a cloth or perforated
plastic sheet. Do not use sheets of non-per-
forated plastic as they do not allow mois-
ture on the car body to evaporate.
– Inflate the tyres to 0.5 bar above the
normal specified pressure and check it at in-
tervals.
– If you don’t disconnect the battery from
the electric system, check its charge every
month and recharge it if the optical indica-
tor shows a dark colour without the central
green area.
– Do not drain the engine cooling system. Snow chains cannot be
fitted to the spare wheel
so, if a front (drive) tyre is
punctured and chains must be fit-
ted, the rear wheel should be fit-
ted to the front of the vehicle (in-
flate the tyres to the specified
pressure as soon as possible) and
the spare tyre should be fitted to
the rear. A snow chain can then be
safely fitted to the front wheel.

IN AN EMERGENCY
207
STARTING BY INERTIA
IN THE EVENT OF A
PUNCTUREWARNINGIf the car is equipped with
“Fix&Go kit for tyre quick repair”, see the
instructions contained in the following
chapter.GENERAL INSTRUCTIONSWheel changing and correct use of the jack
and compact spare wheel call for some pre-
cautions as mentioned below. Never push, tow or coast
start the vehicle. This could
cause fuel to flow into the
catalyst damaging it irreversibly.
Remember that the engine
brake and power steering
are not operational until the engine
is started, therefore, much greater
effort than usual is needed on the
brake pedal and steering wheel.
WARNING
Signal the presence of the
stationary vehicle accord-
ing to the current regulations: haz-
ard warning lights, reflecting tri-
angle, etc.
Any passengers should leave the
car and wait for the wheel to be
changed out of harm of the traffic.
If parked on a slope or uneven road
surfaces, place wedges or other
suitable devices under the wheels
to prevent the car from rolling.
Never start the engine when the
car is raised on the jack.
When towing a trailer, always
remove the trailer before lifting
the car.
WARNING

IN AN EMERGENCY
208
The spare wheel (for ver-
sions/markets where re-
quired) is specific to your model of
car; do not use it on other models,
or use the spare wheel of other
models on your car.
Should the type of wheels used be
changed (alloy rims instead of
steel), it is also necessary to re-
place the complete kit of fastening
bolts with others of suitable size.
The compact spare wheel should
only be used in an emergency and
even then its use should be kept to
a minimum. Do not drive at speeds
of over 80 km/h.
WARNING
On the compact spare
wheel there a sticker with
the main warnings regarding the
compact spare wheel use and lim-
itations. The sticker shall never be
removed or covered. The sticker
bears the following instructions in
four languages:
ATTENTION! ONLY FOR TEMPO-
RARY USE! 80 km/h MAX! RE-
PLACE IT AS SOON AS POSSIBLE
WITH A STANDARD WHEEL. DO
NOT COVER THIS INDICATION.
No wheel cap shall be placed on
the compact spare wheel.
The car will handle differently
when the spare wheel is fitted.
Avoid sudden acceleration or brak-
ing, sharp corners and fast bends.
WARNING
The life of the spare wheel
is approx. 3,000 km. After
this distance it should be replaced
with another of the same type.
Never attempt to fit a tradition-
al tyre to a rim designed for use as
compact spare wheel. Have the
punctured wheel repaired and re-
placed as soon as possible.
Two or more compact spare
wheels should never be used to-
gether.
Do not grease the threads of the
bolts before installing them; they
might slip out.
The jack only serves for chang-
ing wheels on the car with which it
is provided or on cars of the same
model. It must not be used for oth-
er purposes such as for instance
raising cars of other models. In no
case should it be used for repairs
under the vehicle.
The vehicle may fall if the jack is
not positioned correctly.
Do not use the jack for higher ca-
pacities than stated on its label.
WARNING

IN AN EMERGENCY
209
CHANGING A WHEEL(optional for versions/markets
where applicable)
You are informed that:
– The jack mass is 2,100 kg.
– The jack requires no adjustment.
– The jack cannot be repaired, in the event
of breakage it must be replaced by anoth-
er original one.
– No tools other than its operating crank
can be fitted to the jack.
To change the wheel proceed as follows:
– Stop the car in such a position that it is
not dangerous for the traffic, where it is pos-
sible to change the wheel safely. Where pos-
sible, park on a level, compact surface.– Stop the engine and engage the hand-
brake.
– Engage first gear or reverse.
– Lift the boot carpet and hook it as shown
in (fig. 1a).
– Loosen the clamping device (handle)
(A-fig. 2).
fig. 2
A0B0234m
fig. 1a
A0B0577m
Snow chains cannot be fit-
ted to the compact spare
wheel, so, if a front wheel is punc-
tured and chains need to be used,
the front axle should be fitted with
normal wheels and the spare
wheel fitted to the rear. In this
way, as two normal tyres are fit-
ted to the front of the vehicle,
snow chains can be mounted,
thereby overcoming an emergency.
Absolutely never tamper with the
inflation valve.
Do not insert tools of any kind be-
tween the rim and the tyre.
Routinely check that the pressure
of the tyres and of the compact
spare wheel is as specified in the
“Technical specifications” chapter.
WARNING

IN AN EMERGENCY
210
– Take out the tool container (B) and take
it near the wheel to be changed.
– Take the spare wheel (C).
– Remove the wheel cap (A-fig. 3) (for
versions wuth steel rims only).
– Loosen the fastening bolts by approx.
one turn (B-fig. 4).– Place the jack under the car near the
wheel to be changed.
– Work the jack crank (A-fig. 5)to ex-
tend it until the groove (B-fig. 6) on the
upper part of the jack is correctly inserted
on the lower profile of the body (C-fig. 6)
at about 40 cm from the profile of the
wheelhouse.
– Work the jack and raise the car until the
wheel is a few centimetres from the ground.
– Completely unscrew the bolts (B-
fig. 4), and remove the wheel.
– Make sure that the contact surfaces of
the compact spare wheel with the hub are
clean and free of impurities which may lat-
ter cause the fastening bolts to slacken.– Install the spare wheel by matching one
of the holes (A-fig. 7) with the corre-
sponding pin (B-fig. 7).
– Tighten the five fastening bolts.
– Lower the car and remove the jack.fig. 4
A0B0230m
fig. 3
A0B0229m
fig. 5
A0B0231m
fig. 7
A0B0226m
fig. 6
A0B0232m

IN AN EMERGENCY
211
– Fully tighten the bolts in the sequence
shown in fig. 8, without refitting the cap.REFITTING A NORMAL WHEEL– Following the procedure described pre-
viously, raise the car and remove the spare
wheel.
For versions with steel rims:
– Fit a normal wheel bearing in mind that
the pin (B-fig.7) must match one of the
holes (A-fig.7).
– Make sure that the contact surfaces of
the compact spare wheel with the hub are
clean and free of impurities which may lat-
ter cause the fastening bolts to slacken.– Screw the fastening bolts.
– Tighten the bolts following the order pre-
viously described for the compact spare
wheel fig. 7.
– Place the cap near the wheel so that the
inflating valve can come out through the
countersunk hole. Press the wheel circum-
ference starting from the area next to the
valve countersunk hole until it is complete-
ly inserted.
For cars with alloy rims:
– Tighten the pin (A-fig. 9) in one of
the fastening bolt holes.
– Fit the wheel on the pin and fasten it
with four bolts.
– Remove the centering pin (A-fig. 9)
and tighten the last bolt.
– Lower the car and remove the jack; then
tighten the bolts as described previously for
the spare wheel (fig. 7).
WARNINGIncorrect fitting might cause
the wheel cap to come off when the car is
on the move.After refitting the wheel:
– stow the spare wheel in the space pro-
vided in the luggage compartment;
– insert the jack in its container forcing it
lightly to prevent it from vibrating during
travelling;
– place the tools used in the housings pro-
vided on the support;
– place the tool container on the spare
wheel and secure everything with the clamp-
ing device (A-fig. 2).fig. 8
A0B0227m
fig. 9
A0B0228m

IN AN EMERGENCY
212
The quick repairing kit is placed in the boot
inside the appropriate container A-fig. 10.
The quick repairing kit includesfig. 11:•a tool Ato remove the valve body;•a compressor Bwith pressure gauge and
fittings;
FIX&GO KIT
FOR QUICK TYRE
REPAIRING(for versions/markets where
applicable)
The car can be equipped (for versions/
markets where applicable) with a tyre quick
repairing kit called FIX&GO, replacing the
tools and the compact spare wheel usually
provided with the car.fig. 10
A0B0390m
fig. 11
A0B0332m
•a small cylinder Ccontaining sealer and
fitted with a filling pipe, and a sticker bear-
ing the notice “max 80 km/h”, to be
placed in a position visible to the driver (on
the instrument panel) after fixing the tyre;•a “spout” Dto be connected to the fill-
ing pipe.