check engine Alfa Romeo Giulietta 2012 Owner handbook (in English)

121
GETTING
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CONTENTS
EOBD SYSTEM
(European On Board Diagnosis)
(for versions/markets, where provided)
The aim of the EOBD (European On Board Diagnosis) system is to:
❍to monitor system efficiency;
❍indicate an increase in emissions;
❍to warn of the need to replace deteriorated components.
The car also has a diagnostic connector that can be interfaced
with appropriate tools, which makes it possible to read the error
codes stored in the electronic control units together with a series
of specific parameters for engine operation and diagnosis. This
check can also be carried out by the traffic police.
IMPORTANT After eliminating a fault, to check the system com-
pletely, Alfa Romeo Authorized Services are obliged to run tests
and, if necessary, road tests which may also call for a long journey.
DUAL PINION ACTIVE STEERING
This only operates with the key turned to MAR and the engine start-
ed. The steering allows the force required at the steering wheel
to be adjusted to suit driving conditions. The different power as-
sistance modes can be selected via the d,n,a positions of the"Alfa
DNA System" lever (see paragraph entitled "Alfa DNA System").
IMPORTANT The steering system will need to be initialised after
disconnecting the battery. A warning light will come on to indicate
this. Simply turn the steering wheel all the way from one end to the
other or simply drive in a straight line for a few hundred metres.
Under no circumstances should aftermarket op-
erations be carried out involving steering system
or steering column modifications (e.g. installation
of anti-theft device). This could negatively affect perfor-
mance and safety, invalidate the warranty, cause serious
safety problems and also result in non-compliance of the
car with type-approval requirements.

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If the warning light ¬does not turn on when the key
is turned to MAR, or if it stays on when travelling (to-
gether with the message on the display on some ver-
sions), there could be a failure in the restraint systems. If
this is the case, the air bags or pretensioners may not be de-
ployed in the event of an accident or, less likely, they may
be deployed accidentally. Do not drive the car and contact
a Alfa Romeo Authorised Service Provider to have the sys-
tem checked immediately.
The expiry dates of the pyrotechnic charge and
clock contact are shown in the plate installed in-
side the glove compartment. Go to an Alfa Romeo
Authorised Service Provider when the time to have them
replaced approaches.
Do not travel with objects on your lap, in front of
your chest, or between your lips (e.g. pipes, pen-
cils, etc.): you may be seriously injured in the event
of a crash with air bag deployment.
If someone tries to steal or damage your car, and
in the event of floods, have the air bag system
checked by an Alfa Romeo Authorised Service
Provider.
With the ignition key inserted and turned to MAR,
the air bags can be deployed also with the car at
a standstill, if it is hit by another vehicle even if the
engine is off. For this reason, children must never sit on
the front seat, even if the car is not moving. Remember
that no safety device (airbag or pretensioner) will be de-
ployed in a crash if the key is inserted and turned to the
STOP position. Failure to deploy in such cases must not
be considered a sign of malfunction.
When the ignition key is turned to MAR, the “
warning light turns on (front airbag on passenger’s
side enabled) and will blinks for a few seconds as
a reminder that the passenger airbag will be deployed
in the event of a crash and then go off.
The front air bags are deployed in the event of
more severe collisions than those required for de-
ploying the pretensioners.
For collisions in the range between the two thresholds, it
is normal for only the pretensioners to be activated.

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CONTENTS
Keep your speed down when snow chains are fit-
ted - do not exceed 50 km/h. Avoid potholes, steps
and pavements and also avoid driving for long dis-
tances on roads not covered with snow to avoid damag-
ing the car and the road surface.
SNOW CHAINS
The use of snow chains should be in compliance with local regu-
lations. Snow chains may be fitted only to the front wheel tyres
(drive wheels).
Check the tension of the chains after the first few metres have been
driven.
Use reduced bulk snow chains:
– All versions: for 195/55 R16”, 205/55 R16” and 225/45
R17” size tyres use low-clearance snow chains with a maximum
protrusion beyond the tyre profile of 9 mm.
IMPORTANT The space-saver wheel cannot be fitted with snow
chains. If a front (drive) wheel is punctured and snow chains must
be used, you must remove a normal wheel from the rear and re-
place this one with the space-saver wheel. In this way, with two
normal drive wheels, it is possible to use snow chains.
STORING THE CAR
If the car is to be left inactive for longer than a month, the following
precautions should be noted:
❍park the car in a dry, covered and, if possible, ventilated area;
engage a gear and check that the handbrake is not engaged;
❍disconnect the negative battery terminal and check battery
charge. Repeat this check once every three months during stor-
age;
❍clean and protect painted areas using protective wax;
❍clean and protect the shiny metal areas using special com-
mercially-available products;
❍sprinkle talcum powder on the rubber windscreen and rear win-
dow wiper blades and lift them off the glass;
❍slightly open the windows;
❍cover the car with a fabric or perforated plastic sheet. Do not
use compact plastic sheets which do not allow humidity to evap-
orate from the surface of the car.
❍inflate tyres to a pressure of +0.5 bar above the normal spec-
ified pressure and check the pressure at regular intervals;
❍if you have not disconnected the battery, check the battery
charge every thirty days;
❍do not drain the engine cooling system.

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❍inflate the tyre to the pressure shown in the “Wheels” para-
graph in the “Technical Specifications” chapter. In order to ob-
tain a precise reading, check the pressure on pressure gauge
B-fig. 126 with the compressor off;
❍if after 5 minutes you cannot reach at least 1.8 bar, unplug the
compressor from the valve and the socket, then move the car
forward about ten metres in order to distribute the sealant in-
side the tyre evenly, then repeat the inflation operation;
❍if you still cannot obtain a pressure of at least 1.8 bar within
5 minutes from the compressor switching on, do not drive off
and contact Alfa Romeo Authorized Services;
❍after driving for about 10 minutes, stop and check the tyre pres-
sure again; remember to put the handbrake on;
Apply the adhesive label where it can be easily
seen by the driver as a reminder that the tyre has
been treated with the quick repair kit. Drive care-
fully, particularly on bends. Do not exceed 80 km/h. Do
not accelerate or brake suddenly.
❍if a pressure value of at least 1.8 bar is detected, restore the
correct pressure (with the engine running and the handbrake
engaged), and drive with care to Alfa Romeo Authorized Ser-
vices.
If the pressure has fallen below 1.8 bar, do not dri-
ve any further: the Automatic Fix&Go quick tyre
repair kit cannot guarantee proper hold because
the tyre is too damaged. Contact Alfa Romeo Authorized
Services.
Remember to inform the workshop that the tyre
has been treated with a quick repair kit. Give the
instruction booklet to the personnel charged with
handling the treated tyre.
fig. 127A0K0128m

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CHANGING A FUSE
GENERAL INFORMATION
Fuses protect the electric system: they blow in the event of a
fault/intervention in the system. Check the state of the corre-
sponding fuse when a device does not work: the filament A-fig.
150 must be intact.
If it is, replace the blown fuse with a new one with the same am-
perage (same colour).
B = intact fuse.
C = fuse with damaged filament.
fig. 150A0K0042mfig. 151A0K0207m
Use the pliers A-fig. 151 under the engine compartment fusebox
lid to remove the fuses (see “Engine compartment fusebox” for
how to remove the lid).

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SCHEDULED SERVICING PLAN
1.4 Turbo Petrol and 1.4 Turbo Multi Air VERSIONS
Thousands of miles
Thousands of km
Months
Check tyre condition/wear and adjust pressure if required
Check lighting system operation (headlights, direction indicators, hazard lights, passenger
compartment lights, boot lights, instrument panel warning lights, etc.)
Check windscreen wiper/washer operation
Check the position/wear of the windscreen/rear window wiper blades
Check condition and wear of front disc brake pads and
operation of pad wear indicator
Check rear disc brake pad condition and wear
Conditions and visual check: bodywork exterior, underbody protection,
pipes and hoses (exhaust - fuel system - braking system),
rubber elements (boots - sleeves - bushes - etc.)
Check cleanliness of bonnet and boot locks,
as well as cleanliness and lubrication of linkages
Check and top up, if required, fluid levels
(engine coolant, brake/hydraulic clutch fluid, windscreen washer fluid, battery fluid, etc)
Check the handbrake lever travel and adjust it, if necessary
Check condition of timing belt
Visually inspect the condition of accessory drive belt(s)
Check exhaust gas emissions
Check battery charge status and possibly recharge18 36 54 72 90 108
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CONTENTS
2 If the car is mainly used in cities or travels less than 10,000 km a year, change the engine oil and filter every 12
months.
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1 For 1.4 Turbo Petrol and 1.4 Turbo Multi Air versions, in order to guarantee correct operation and prevent seri-
ous damage to the engine, it is essential to observe the following:
- only use spark plugs specifically certified for Turbo Petrol engines; all spark plugs should be of the same type and brand
(see the “Engine” paragraph in the “Technical Specifications” chapter);
- adhere strictly to the spark plug replacement intervals detailed in the Scheduled Servicing Plan;
- You are advised to go to Alfa Romeo Authorized Services to have the spare plugs replaced.
Thousands of miles
Thousands of km
Months
Check engine control system operation (using diagnosis socket)
Replace accessory drive belt(s)
Replace toothed timing drive belt (*)
Replace spark plugs 1
Replace air filter cartridge
Change engine oil and oil filter (or every 24 months) 2
Change brake fluid (or every 24 months)
Change pollen filter (or every 15 months)
(*) Regardless of the distance covered, the timing belt must be changed every 4 years for particularly demanding use (cold climates, city driving,
long periods of idling) or at least every 5 years.

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202
GETTING
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YOUR CAR
SAFETY
STARTING
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IN AN
EMERGENCY
SERVICING AND
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TECHNICAL
SPECIFICATIONS
CONTENTS
1750 Turbo Petrol VERSIONS
Thousands of miles
Thousands of km
Months
Check tyre conditions/wear and adjust pressure if required
Check lighting system operation (headlights, direction indicators, hazard warning lights, passenger
compartment lights, boot lights, instrument panel warning lights, etc.)
Check windscreen wiper/washer operation
Check the position/wear of the windscreen/rear window wiper blades
Check condition and wear of front disc brake pads and operation of pad wear indicator
Check rear disc brake pad condition and wear
Conditions and visual check: bodywork exterior, underbody protection,
pipes and hoses (exhaust - fuel system - braking system),
rubber elements (boots - sleeves - bushes - etc.)
Check cleanness of locks, bonnet and boot and lever cleanness and lubrication
Check and top up, if required, fluid levels
(engine coolant, brake/hydraulic clutch fluid, windscreen washer fluid, battery fluid, etc)
Check the handbrake lever travel and adjust it, if necessary
Visually inspect the condition of the auxiliary drive belt
Visually inspect the condition of toothed timing belt

203
GETTING
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(*) Regardless of the distance covered, the timing belt must be changed every four years for particularly demanding use (cold climates, city driving,
long periods of idling) or at least every five years in all other cases.
(**) The engine oil and the oil filter must be changed when the instrument panel warning light comes on (see “Warning lights and messages” in “Get-
ting to know your car” chapter) or in any case every 12 months.
Thousands of miles
Thousands of km
Months
Check exhaust emissions
Check battery charge status and possibly recharge
Check engine control system operation (via diagnostic socket)
Replace accessory drive belt(s)
Replace toothed timing belt (*)
Replace spark plugs
Replace air filter cartridge
Change engine oil and oil filter (or every 12 months) (**)
Change brake fluid (or every 24 months)
Change pollen filter (or every 15 months)21 42 63 84 105
35 70 105 140 175
24 48 72 96 120
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204
GETTING
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YOUR CAR
SAFETY
STARTING
AND DRIVING
IN AN
EMERGENCY
SERVICING AND
MAINTENANCE
TECHNICAL
SPECIFICATIONS
CONTENTS
Thousands of miles
Thousands of km
Months
Check tyre condition/wear and adjust pressure if required
Check operation of lighting system (headlights, direction indicators, hazard warning lights,
luggage compartment, passenger compartment, instrument panel warning lights, etc.)
Check windscreen wiper/washer operation
Check the position/wear of the windscreen/rear window wiper blades
Check condition and wear of front disc brake pads and operation of pad wear indicator
Check rear disc brake pad condition and wear
Conditions and visual check: bodywork exterior, underbody protection,
pipes and hoses (exhaust - fuel system - braking system),
rubber elements (boots - sleeves - bushes - etc.)
Check cleanliness of bonnet and boot locks, as well as cleanliness and lubrication of linkages
Check and top up, if required, fluid levels
(engine coolant, brake/hydraulic clutch fluid, windscreen washer fluid, battery fluid, etc)
Check the handbrake lever travel and adjust it, if necessary
Check exhaust fumes/emissions
Check battery charge status and possibly recharge
Visually inspect the condition of the auxiliary drive belt
Check engine control system operation (via diagnostic socket)21 42 63 84 105
35 70 105 140 175
24 48 72 96 120
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Diesel VERSIONS