2007 Alfa Romeo 166 service

167
FRONT LIGHT UNITS - GAS
DISCHARGE HEADLIGHTS
(optional for versions/markets where
applicable)
The front light units with gas discharge
headlights contain low beam/high beam
(gas discharge), high beam headlamp
signaller (halogen), sidelight and direc-
tion indicator bulbs.
The bulbs are arranged inside the light
unit as follows (fig. 24-25):
A.Direction indicator
B.High beam headlamp signaller and
sidelight
C.Gas discharge low beam/high beam.Low beams/high beams
Xenon bulbs are very longlasting and
failure is highly unlikely.
The following paragraph describes how
to replace xenon bulbs correctly.
Any work on the front
light units should be car-
ried out with the light switch at
position 0 (lights off) and with the
ignition key removed from the
switch: danger of electric dis-
charge.
WARNING
If necessary, have the
system checked and if
necessary repaired only by Autho-
rized Alfa Romeo Services.
WARNING
A0D0064m
fig. 24
A0D0065m
fig. 25

176
– Fit the new bulb in the headlight re-
flector making the notches coincide with
the corresponding grooves.
– Lock the bulb with the clip.
– Fit the connector to the bulb.
– Refit the cover and lock it by turning
it clockwise.
– Refit the light unit connector.IMPORTANT The screw (E- fig.
50) serves to adjust the beam of the
foglights.
To adjust the front fog-
lights contact Alfa
Romeo Authorized Ser-
vices.
The efficiency of the
lights will be decreased
and may inconvenience other road
users if the light units are not cor-
rectly adjusted. If in doubt contact
Alfa Romeo Authorized Services to
have them checked and adjusted if
necessary.
WARNING
A0D0083m
fig. 51
A0D0084m
fig. 52

179
DIRECTION INDICATORS AND
SIDE LIGHTS/STOP LIGHTS
(fig. 59)
WARNING The rear direction indica-
tors comprise leds integrated in the light
unit: should they fail to operate, contact
Authorized Alfa Romeo Services.
To replace the bulb (Type B, sidelight
5W/stop light 21W):
– Open the boot
– Remove the bulb holder (A-
fig. 59) turning counter-clockwise.
– Remove and replace the bulb (B)
(spherical type with bayonet coupling)
pushing gently and turning counter-clock-
wise.– Re-insert the bulb holder unit correctly
in place and fasten turning clockwise.
NUMBER PLATE LIGHTS
(fig. 60-61-62)
To replace the bulbs (Type A, 5W):
– Withdraw the number plate light unit
releasing the catch (A-fig. 60) using a
flat screwdriver protected with a soft
cloth.
– Withdraw the unit (B-fig. 61).
– Withdraw the bulb holder (C-
fig. 62) turning gently and replace the
bulb (D) which is snap-fitted.
– Refit the bulb holder (C-fig. 62)
and the complete unit (B-fig. 61).
481PGSm
fig. 60
482PGSm
fig. 61
483PGSm
fig. 62
480PGSm
fig. 59

186 IN THE EVENT OF
A BURNT FUSE
OR RELAY
GENERALITIES(fig. 83)
When an electric device is no longer
working, check that its fuse is intact.
A- Intact fuse
B- Fuse with damaged filament.
Remove the fuse to be replaced using
the pincer (C) on the fusebox.
Replace the fuse with another of the
same rating and colour.Before replacing a fuse
check that the key has
been removed from the
ignition and that all the services
are switched off and/or disen-
gaged.
Never replace a dam-
aged fuse with anything
other than an intact
fuse.
Never replace a fuse
with another with a
higher amp rating, DANGER OF
WARNING
3290CAm
fig. 83
If a fuse blows again con-
tact Alfa Romeo Autho-
rized Services. The systems and de-
vices protected by fuses are in
listed in the tables on next pages.
WARNING

188
FUSES AND RELAYS IN
ENGINE BAY
The fuses and relays in the engine bay
are housed:
– In a box set next to the left side pan-
el (fig. 88).
– On a bracket set behind the left
headlight (fig. 91).To gain access to the box, remove the
cover (A-fig. 87), releasing it from the
retaining clips.
The devices protected by the fuses in
the engine bay are listed in the tables on
next pages.IMPORTANTThe arrangement of the
relays may vary depending on the ver-
sions and markets. In the event of a sus-
pected anomaly, contact Alfa Romeo Au-
thorized Services.
A0D0093m
fig. 87
A0D0094m
fig. 88 fig. 89
A0D0095m

190
FUSES AND RELAYS IN THE
BOOT
Fuses and relays are housed in the
right-hand side of the boot are housed in
a box, in the recess closed by cover (A-
fig. 92).
To open the cover turn the knob (B).
The devices protected by the fuses in
the boot are listed in the tables on next
pages.IMPORTANTThe arrangement of the
relays may vary depending on the ver-
sions and markets. In the event of a sus-
pected anomaly, contact Alfa Romeo Au-
thorized Services.Circuits operated by relays are the fol-
lowing (fig. 93):
A.Air mixing actuator, climate control
unit, additional heater control (JTD ver-
sions)
B.Rearscreen heating relay
C.Seat warming control, elec-
trochromic driving mirror, sun visor light,
rain sensor, parking sensor control unit,
door mirror control light, remote control
receiver, alarm system control unit, dri-
ver's power window control LOCK warn-
ing light
D.Windscreen heating, door mirror de-
frosting
E.Front seat warming, rear current
socket, front seat electric adjustment,
powered sunroof
F.Direction indicators, trailer presetting
518PGS
fig. 93
A0D0097m
A0D0111m
fig. 92

194 IN THE EVENT
OF A FLAT BATTERY
STARTING WITH AN
AUXILIARY BATTERY
If the battery is flat, it is possible to start the
engine using an auxiliary battery (B-fig.
96) with the same electrical characteristics
as the original battery (A-fig. 96) (see
chapter “Technical specifications”).
The battery is housed on the left-hand
side of the boot, protected by a cover.
If the battery is low, the servocontrol
operating when the luggage compart-
ment opens from inside or by the key
does not work. However, it is always pos-
sible to open the luggage compartmentto reach the battery. Just rotate the key
wider simultaneously pressing on the bon-
net edge by the hand.
IMPORTANTApply a moderate pres-
sure only on the bonnet edge, immediate-
ly above the lock.
On versions without navigation system and
without CD player, access to the battery is
gained by slackening the knob (A-fig. 94)
and removing the battery cover.
On versions with navigation system and
/or CD player, access to the battery is
gained by slackening the knobs (A-fig.
95) and removing the cover (B).
Starting with an auxiliary battery does
not damages the Alfa Romeo CODE sys-
tem and must be carried out as follows:– Switch off all the not strictly neces-
sary electric devices.
– Connect a jump lead to the positive
terminals (1-fig. 96) of the two batter-
ies (+ sign next to the terminal).
– Connect another jump lead to the
negative terminals (2) of both batteries
(– sign next to the terminal).
– Start the engine.
– When the engine has started, remove
the cables reversing the sequence de-
scribed for connecting them.
– If after a few attempts, the engine
fails to start, do not insist pointlessly and
contact the nearest Authorized Alfa
Romeo Services.
fig. 96
A
B
fig. 94
A0D0107m3052CAm
fig. 95
341PGSm

202 PROGRAMMED
MAINTENANCE
PRECAUTIONS
Many moving parts, high voltage cables
and parts that reach high temperatures
which may cause serious injury to unquali-
fied persons are located in the engine
compartment.
The following precautions should there-
fore be taken:
– Switch off the engine and wait until
it cools.
– Be particularly cautious when work-
ing near the engine cooling fan as this
may cut in unexpectedly on the basis of
the engine coolant temperature.
– Do not smoke or use naked flame.
– Always keep a fire extinguisher to
hand.
– Do not use the jack supplied with the
car for checking underneath it.Vehicle maintenance
should be entrusted to
an Alfa Romeo Author-
ized Service. For interventions of
routine maintenance and small
repairs you wish to carry out
your-self, make sure you always
have the proper equipment, gen-
uine Alfa Romeo spare parts and
the necessary liquids; do not,
however, carry out these opera-
tions if you have no experience.
The jack with which the
vehicle is fitted must on-
ly be used when changing a wheel.
All other operations where the ve-
hicle must be lifted require the use
of specific procedures and should
be carried out by Alfa Romeo Au-
thorized Services.
WARNING
Ensure that scarves, ties
and loose clothing cannot
get caught by moving parts.
WARNING
DANGER-SERIOUS INJU-
RY. When carrying out
checks or maintenance operations
in the engine compartment, take
special care not to bump the head
on the raised bonnet.
WARNING
Never smoke when
working in the engine
compartment: inflammable gas and
vapours may be present which con-
stitute a fire hazard.
WARNING