2004 Alfa Romeo 156 parking sensors

GETTING TO KNOW YOUR CAR
187
ENVIRONMENTAL
PROTECTIONThe design and construction of the vehi-
cle have not only been developed with the
traditional aspects of performance and
safety in mind, but also take into account
the increasingly pressing problems tied to
protecting the environment.
The choice of materials, techniques and
particular parts are the result of work which
has made it possible to drastically reduce
the harmful effects on the environment and
guarantee respect for the severest interna-
tional norms.USE OF NON-TOXIC
MATERIALSNone of the components of the vehicle con-
tains asbestos. The padding and the climate
control system do not contain CFCs which
are held to be responsible for the depletion
of the ozone layer.
The colouring agents and the corrosion in-
hibitors used on the nuts, screws and bolts
do not contain cadmium any more, which
could pollute the atmosphere or water tables.
PARKING SENSORS
(WHERE PROVIDED)(optional for versions/markets
where applicable)
The parking system detects and informs
the driver (through an intermittent acoustic
signal) about the presence of obstacles in
the rear part of the car (fig. 179). ACTIVATIONThe sensors are automatically activated
when the reverse gear is engaged.
The sound produced by the acoustic alarm
becomes continuous when the distance be-
tween the car and the obstacle is less that
30 cm.
ACOUSTIC SIGNALWhen the reverse gear is engaged an in-
termittent acoustic signal is automatically
activated.
The acoustic signal:
– raises with the reduction of distance be-
tween the car and the obstacle;
– becomes continuous when the distance
between the car and the obstacle is less that
30 cm and stops if the distance raises.
– is constant if the distance is unvaried.
If this situation takes place for side sensors,
the signal is stopped after about 3 seconds
to prevent sound indications when per-
forming manoeuvres near walls.fig. 179
A0B0609m

TECHNICAL SPECIFICATIONS
305
SPARK PLUGClean, intact spark plugs are determinant
with regard to engine efficiency and for re-
ducing the emission of pollutants.Spark plugs should be re-
placed at the intervals
specified in the Scheduled
Maintenance Programme. Only use
spark plugs of the specified type: if
the thermal capacity is inadequate
or if the envisaged life is not guar-
anteed inconveniences may ensue.BRAKESService brakes:
– front
– rearParking brake
If examined by an expert eye, the ap-
pearance of a spark plug is a sound clue
for locating a fault, even if not involving the
ignition system. Therefore if you are expe-
riencing any engine problems, it is impor-
tant to have the spark plugs checked by Al-
fa Romeo Authorized Services.
STEERING
1.6 T.SPARK 1.8 T.SPARK 2.0 JTS 2.0 JTS 2.5 V6 24V 2.5 V6 24V JTD JTD 20V
Selespeed Q-System JTD 16V Multijet
MultijetSelf-ventilated Self-ventilated Self-ventilated Self-ventilated Self-ventilated Self-ventilated Self-ventilated Self-ventilated
disk disk disk disk disk disk disk disk
Disk Disk Disk Disk Disk Disk Disk Disk
Wheel anti-look system (ABS) with electronic braking distribution.
Servo-brake. Electronic control with brake pad wear sensors. Gasket of ecological type.
Controlled by hand lever operating rear brakes.
Type Turning radius(between pavements)
1.6 T.SPARK 1.8 T.SPARK 2.0 JTS 2.0 JTS 2.5 V6 24V 2.5 V6 24V JTD-JTD 16V JTD 20V
Selespeed Q-System Multijet Multijet
Rack and pinion.
Hydraulic power steering with liquid reservoir in engine compartment
11.1 m 11.1 m 11.1 m 11.1 m 11.6 m 11.6 m 11.1 m 11.1

ALPHABETICAL INDEX
331
N
umber plate lights
– changing bulbs ................ 229-296
O
ddment recesses
– in the boot ........................... 285
– on centre console ................... 165
– on dashboard ........................ 165
Odometer ................................... 59
Paintwork (maintenance) ............ 275
– colour label ........................... 301
Parking....................................... 191
Parking sensors............................ 187
Partial odometer .......................... 63
Performance................................ 314
Pockets and compartments
on front doors ........................... 165
Pollen filter ................................ 266
Power steering
– checking fluid level
and topping up ..................... 262
Power windows ........................... 27
Pre-tensioning devices ................... 32
Protecting emission reducing
devices ....................................... 198
Q
-system automatic gearbox........ 152
– acoustic warning .................... 159
– automatic operation ............... 154
– checking the oil level .............. 260
– fault signalling ....................... 158
– manual operating mode/
Q-System activation................ 157
– moving off ............................ 152
– push starting ......................... 159
– selecting automatic/
manual gearshifting................ 153
– selecting the driving modes ..... 156
– starting the engine ................. 152
– stopping the car ..................... 157
– towing the car ....................... 160
R
adio transmitters and cellular
telephones ............................... 167
Rain sensor ................................. 51
Rear fog guards
– changing bulbs ............... 227-294
– switching on.......................... 136
Rear light units
– bulb replacement ................... 227
Rear roof lights ............................ 163
– changing bulbs ...................... 231
Rear seats................................... 23– centre armrest ................. 23-280
– headrests ....................... 24-279
– ski compartment.............. 24-280
Rear suspensions
(automatic geometry control) ..... 293
Rearscreen heating................. 26-133
Rearscreen washer ....................... 281
– spray jet ............................... 281
Rearscreen wiper
– blade replacement ................. 281
– operation .............................. 281
Reducing running costs
and environment pollution .......... 197
Refilling ..................................... 319
Remote control ............................ 7-12
– additional remote controls ...... 12
– alarm system ........................ 11
– boot opening ......................... 8
– changing the battery .............. 10
– door opening-closing ............... 7
– ministerial homologation ......... 325
– remote door locking/
unlocking .............................. 16
Rev counter................................. 62
Reversing lights
– changing bulbs ................ 227-294