2008 Alfa Romeo 166 engine

89
IMPORTANT In this condition (recir-
culation on and compressor off), remem-
ber that the windows may steam up very
quickly.
Pressing the button the climate
control automatically activates the func-
tions required to quicken demisting/de-
frosting of the windscreen and side win-
dows. Rearscreen heating and door mirror
heating are also automatically engaged
(for a determinate length of time).
Pressing the button engages
rearscreen heating and door mirror heat-
ing for a determinate length of time.Manually setting one of the climate con-
trol functions, the others continue to be
controlled automatically; in particular the
air temperature is always controlled auto-
matically to reach the required “equiva-
lent temperature” in the passenger com-
partment.
IMPORTANT When working in the
FULL AUTOcondition, the system can
automatically engage recirculation or de-
activate the compressor to cool/heat the
passenger compartment faster or
demist/defrost the windscreen and side
windows.IMPORTANT When the engine is
turned off the system memorises the cli-
mate control operating condition, which
will be automatically resumed when the
engine is started again.

91
ADDITIONAL HEATER
(Optional, for diesel versions, where
applicable)
The additional heater makes it possible
to integrate heating of the engine coolant
fluid, immediately after starting the en-
gine and when travelling, to more quickly
reach and maintain the optimum operat-
ing temperature of the engine and pas-
senger compartment heater.
The device works completely automati-
cally and it is activated only when the en-
gine is running with an outside tempera-
ture of +5°C or less and a coolant fluid
temperature below 60°C.
When the coolant fluid reaches 61°C,
the electronic control unit reduces the
power of the burner and stops the heater
when a temperature of 72°C is reached,
reactivating it automatically when the flu-
id temperature falls below 60°C. Con-
versely, if after reducing the power of the
burner, the fluid temperature begins to
fall, the control unit cuts in to restore full
power.The system comprises:
– a fuel oil burner for heating the water
and a combustion gas exhaust silencer.
– A batching pump connected to the car
reservoir pipes to supply the burner.
– An electronic control unit for control-
ling burner adjustment.
– An outside temperature sensor.IMPORTANT The heater is fitted with
a thermal limiting device which cuts off
combustion in the event of overheating
due to lack/leaks of coolant fluid.
The heater is also protected by the auto-
matic fuel cut-off switch, which shuts off
the fuel in the event of a crash of a cer-
tain size: to see how this works see the
“automatic fuel cut-off switch” para-
graph.

92
The temperature near
the heater should never
exceed 120°C (e.g. dur-
ing body painting operations in
the workshop oven). Higher tem-
perature could damage the elec-
tronic control unit components.
For maintenance and repairs con-
tact only Authorized Alfa Romeo
Services and only use original
spare parts.
The burner exhaust gas
is released in the centre
floor area: therefore never park
the car with the engine running
over inflammable surfaces, fire
hazard!
WARNING
IMPORTANT When the heater is
working with the vehicle stationery and
the engine running, standing outside the
car near the rear wheel arch a low noise
caused by normal operation of the heater
can be heard.MAINTENANCE
Have the additional heater checked at
regular intervals by Authorized Alfa
Romeo Services. This will ensure safe,
cost-effective working of the heater and
also long life.

94
REAR FOG GUARDS (fig. 98)
These are turned on, with the dipped
beam headlights or fog lights on, by
pressing button (B).
When the rear fog guards are on the led
next to the button lights up.
Turning the ignition key to STOPthe
fog guards are automatically turned off
and they do not come on the next time
the engine is started unless button (B) is
pressed. Press button (B) to turn them
off.
IMPORTANT Always use the rear fog
guards in accordance with local regula-
tions. The fog guard system complies
with EEC/ECE standardsDASHBOARD LIGHTING
ADJUSTMENT
(fig. 99)
When the outside lights are on, the
dashboard lighting is adjusted pressing
button (A).
OPENING THE FUEL FLAP
(fig. 100)
The fuel flap is released from inside the
car pressing the button (A) with the en-
gine off.
A0D0147m
fig. 99
1009PGSm
fig. 98
fig. 100
A0D0030m

109
BONNET
The lever used to open the bonnet is lo-
cated under the left end of the dash-
board.
To open:
– Pull the lever (A-fig. 141) until the
bonnet clicks open.
357PGSm
fig. 141
Do this only with the car
stationary.
WARNING
– Raise the safety lever upwards (B-
fig. 142).
– Raise the bonnet.
IMPORTANT Bonnet raising is aided
by two gas springs. Do not tamper with
these springs and always accompany the
bonnet while raising it.
A0D0033m
fig. 142
DANGER-SERIOUS IN-
JURY. When carrying out
checks or maintenance operations
in the engine compartment, take
special care not to bump the head
on the raised bonnet.
WARNING

110
To close:
– Lower the bonnet to approx. 20 cm.
from the engine bay, then let it drop. Try
lifting it to make sure that it is shut com-
pletely and not simply caught in the safe-
ty position.
If the bonnet does not close properly do
not push it down but open it again and
repeat the above procedure.HEADLIGHTS
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.
For safety reasons the
bonnet shall always be
perfectly closed when travelling.
Always check for proper bonnet
locking. If the bonnet is left inad-
vertently open, stop the car im-
mediately and close the bonnet.
WARNING

113
EOBD SYSTEM
(optional for versions/
markets where applicable
)
The EOBD system (European On Board
Diagnosis) allows continuous diagnosis of
the components of the car correlated with
emissions.
This system continuously monitors the
components of the vehicle related to e-
missions; it also indicates, when the
Uwarning light comes on on the instrument
panel, that the components in question
are in poor condition.
IMPORTANTAfter the problem has
been resolved, to completely check the
system, the Alfa Romeo Authorized Ser-
vice Station must carry out tests on a test
bench and, if necessary, road tests that
could be long.If, when the ignition key
is turned to MAR, the
Uwarning light does
not come on or if, when driving, it
lights up and emits a fixed light
or a flashing one, contact an Alfa
Romeo Authorized Service Station
as soon as possible. Warning
light
Uoperation can be checked
by means of special equipment
by traffic agents. Always comply
with the traffic regulations in
force in the country where you
are travelling.
The objective is the following:
– to keep under control the efficiency of
the system;
– to warn when a fault causes emission
levels to increase;
– to indicate the need to replace the
deteriorated components.
The system also has a diagnostic con-
nector that can be interfaced with appro-
priate tools, which makes it possible to
read the error codes stored in the control
unit, together with a series of specific pa-
rameters for engine operation and diag-
nosis. This check can also be carried out
by the traffic police.

115
Braking on corners always requires the
utmost caution, even with the help of the
ABS.
The most important piece of advice
however, is the following:WARNINGCars fitted with ABS must
only be fitted with wheel rims, tyres and
brake linings of the type and brand ap-
proved by the Manufacturer.
The braking system is completed by the
EBD (Electronic Brake Distributor) which
distributes the braking action through the
ABS control unit and sensors.
Following these instructions you will be
in a condition to obtain peak braking per-
formance at all times.
If the ABS cuts in, it
means that the grip limit
between the tyres and the road
surface has been reached: it is nec-
essary to slow down and adapt
driving to the grip available.
WARNING
In the event of a system
fault, with lighting up of
the
>warning light, have the ve-
hicle checked immediately by Au-
thorized Alfa Romeo Services, driv-
ing slowly to be able to regain full
system performance.
WARNING
When the ABS cuts in and
you feel the pedal pulse,
do not reduce the pressure, but
keep the brake pedal firmly
pressed with no fear; this way you
will stop in the shortest space pos-
sible, compatibly with the condi-
tions of the road surface.
WARNING
The car is fitted with an
electronic brake distrib-
utor (EBD). If the
>andxwarn-
ing lights come on at the same time
when the engine is running, there
is an EBD system fault; in this case,
violent braking may lock the rear
wheels too early, with the possibil-
ity of skidding. Drive extremely
carefully to the nearest Authorized
Alfa Romeo Services to have the
system checked over.
WARNING