2004 Alfa Romeo 156 air condition

GETTING TO KNOW YOUR CAR
125
fig. 107
A0B0068m
To turn the system on again, you only need
to turn the ring of knob (3) clockwise, or
press any button, except the internal air re-
circulation button (7) and rear window
heater button (9); this operation resumes
all the operating conditions previously stored
in the memory.
WARNINGAfter exiting the conditionOFF
, the internal air recirculation
v
is re-
sumed to the condition preceding the switch-
ing off.

GETTING TO KNOW YOUR CAR
127
CLIMATE CONTROL
COMPRESSOR ON/OFF
ENABLE BUTTON
√
(fig. 109)
Pressing button (12)
√
enables the turn-
ing on of the climate control compressor.
This condition is shown by the lighting up of
the led placed on the button itself.
When the climate control compressor is
turned off, the leds on buttons (14)
AUTO
and (12)
√
go off; automatic inside air re-
circulation control is also excluded (both leds
off on button 7
v
) which always stays
off to prevent window misting; in any case,
the automatic operation of inside air recir-
culation can be resumed (though it is not
recommended) by pressing button 7
v
.
fig. 109
A0B0070m

GETTING TO KNOW YOUR CAR
129
fig. 111
A0B0072m
INSIDE AIR RECIRCULATION
ON/OFF BUTTON
v
(fig. 111)
Inside air recirculation is controlled ac-
cording to three operating logics:
– automatic control, indicated by the turn-
ing on of the right led on the button;
– forced switching on (inside air recircu-
lation always on), indicated by the turning
on of the left led on the button (and by the
right led going off at the same time);
– forced switching off (inside air recircu-
lation always off, with air inlet from the out-
side), indicated by the turning off of both
leds.
These operating conditions are obtained
by pressing in sequence the inside air recir-
culation button (7)
v
.
When inside air recirculation is controlled
automatically by the system, the right led
on the air recirculation button (7)
v
stays on all the time and the left led shows
the air recirculation condition:
ON= air recirculation operating;
OFF= air recirculation off.If inside air recirculation has been switched
on or off manually, the led on button (14)
AUTO
turns off.In automatic operation, inside air recircu-
lation is switched on automatically when the
anti-pollution sensor detects the presence of
polluted air, for instance in cities, queues,
tunnels, and when the windscreen
wash/wiper is operated (with the charac-
teristic smell of spirit).

GETTING TO KNOW YOUR CAR
130
With the outside temper-
ature below 2°C the cli-
mate control compressor is unable
to work. It is therefore inadvisable
to use the inside air recirculation
function v
with low outside tem-
perature as windows may mist
over quickly.WARNING
The inside air recirculation
function makes it possible
to reach the required “heating” or
“cooling” conditions faster. It is
however inadvisable to use it on
rainy/cold days as it would con-
siderably increase the possibility of
the windows misting inside, espe-
cially if the climate control system
is off.
WARNING
It is advisable to turn on the
inside air recirculation sys-
tem in queues or tunnels to avoid
admitting polluted air from outside.
The prolonged use of this function
should however be avoided, espe-
cially with several persons on
board, to avoid the possibility of the
windows misting inside.
WARNING
In certain weather condi-
tions (e.g. outside temper-
ature around 0°C) and with auto-
matic air recirculation control on,
mist may form on the windows. In
this case press the inside air re-
circulation button (7)
v
, to
switch off recirculation (leds on
button off) and if necessary in-
crease the flow of air to the wind-
screen.
WARNING

GETTING TO KNOW YOUR CAR
131
BUTTON AUTO AUTOMATIC
OPERATION
(fig. 112)
When button (14)
AUTO
is pressed, the
system automatically regulates the amount
and distribution of the air admitted into the
passenger compartment, clearing all the pre-
vious manual settings.
This condition is indicated by the lighting
of both button leds.
When the right led, on button (14)
AUTO
,
is OFF, it indicates that one or several man-
ual operations have been carried out and,
therefore, that automatic control is not com-
plete (except for temperature control, which
is always automatic) indicated by the left
led on.
fig. 112
A0B0073m

GETTING TO KNOW YOUR CAR
134
This function is timed and switches off au-
tomatically after 20 minutes, or pressing the
button again; the function is also switched
off when the engine is stopped and will not
be switched on again the next time the en-
gine is started.
WARNINGThe system turns on
rearscreen heating automatically if the tem-
perature is below 3°C.
WARNINGDo not apply stickers on the
inside of the rearscreen over the heating fil-
aments to avoid damage that might cause
it to stop working properly.
WARNINGWhen reconnecting the neg-
ative battery cable after having disconnected
it, wait for 2 minutes before turning the key
to enable the climate control system to re-
set actuator strokes properly.
POLLEN FILTER This filter has the specific capability of com-
bining the mechanical filtering of the air with
an electrostatic effect so that the outside air
admitted to the passenger compartment is
purified and free from particles such as dust,
pollen, etc.
In addition to the above, it also effectively
reduces the concentration of pollutants.
The filtering action takes place under all
air inlet conditions and it is clearly most ef-
fective with the windows shut.
Have the conditions of the filter checked by
Alfa Romeo Authorized Services at least once
a year, preferably on the onset of summer.If the vehicle is used mainly in polluted
or dusty areas it should be checked and if
necessary replaced, at shorter intervals.
Failure to replace the fil-
ter may considerably re-
duce the effectiveness of
the climate control system up to
blocking the air flow from the out-
lets and vents.

GETTING TO KNOW YOUR CAR
174
HEADLIGHTSLIGHT BEAM AIMINGWARNINGThe adjustment of the head-
lights is vital to your safety and comfort and
to that of other road users. The adjustment
of the headlights is also governed by precise
regulations. To guarantee both to yourself
and to the other drivers the best visibility
conditions when travelling with the head-
lights on, the vehicle must have its head-
lights properly adjusted.
Contact Alfa Romeo Authorized Services to
have the headlights correctly adjusted.
IMPORTANTOn the inside surface of
the headlight there could appear a slight
coat of fogging; this does not show a defect,
since it is a natural occurrence due to low
temperature and to the degree of humidity
in the air; it will soon disappear as soon as
the lights are turned on. The presence of
drops inside the headlight shows water seep-
age: refer to the Alfa Romeo Dealership.
ROOF RACK
PROVISIONThe car is set for mounting special roof
racks.
Roof racks, especially designed for this car,
must be fastened to pins (A-fig. 168) set
under the packing, as shown in the figure.
Strictly comply with the
regulations in force con-
cerning the maximum over-
all dimensions.
fig. 168
A0B0142m
After a few kilometres,
check that the fastening
screws are firmly tightened.
WARNING
Distribute the load evenly
and when driving, bear in
mind the increased sensitivity to
side wind.
WARNING

GETTING TO KNOW YOUR CAR
188
EMISSION REDUCING DEVICES
(petrol engines)Trivalent catalytic converter
(catalytic silencer)
The exhaust system is fitted with a cat-
alyzer formed of alloys of noble metals. It
is housed in a stainless steel container which
is able to resist the high operating temper-
atures.
The catalyzer converts the unburnt hydro-
carbons, carbon monoxide and nitrogen ox-
ides present in the exhaust gas (even if in
small quantities thanks to the electronic in-
jection and ignition system) into harmless
compounds.Lambda probe
A sensor (lambda probe) measures the
content of oxygen present in the exhaust
gas. The signal transmitted by the lambda
probe is use by the injection and ignition
electronic control unit to adjust the air-fuel
mixture.
Anti-evaporation system
As it is impossible, even when the engine
is switched off, to prevent the formation of
fuel vapours, a system has been devised
which imprisons the vapours in a special ac-
tivated carbon container.
During operation of the engine, these
vapours are sucked up and sent to com-
bustion.
EMISSION REDUCING DEVICES
(JTD engines )Oxidising catalytic converter
Converts the polluting substances present
in the exhaust gases (carbon monoxide, un-
burned hydrocarbons and particulate) into
harmless substances, thus reducing the
fumes and smell that are typical of diesel
engines.
The catalytic converter consists of a stain-
less steel case that houses a ceramic hon-
eycomb body coated with noble metal used
as a catalyst.
Exhaust gas recirculation system
(E.G.R.)
This system recycles, i.e. re-uses, a vary-
ing percentage of the exhaust gases, de-
pending on engine operating conditions.
It is used, when necessary, to control ni-
tric oxides.
Due to the high tempera-
tures reached during oper-
ation of the catalytic converter, the
vehicle should not be parked over
inflammable materials (paper, fuel
oils, grass, dry leaves, etc.).
WARNING