2007 Alfa Romeo 166 fuel pump

77
Faulty ABS anti
wheel-locking
This warning light comes on when the
system is inefficient. In this case normal
braking is ensured without though, mak-
ing use of the ABS system. Alfa Romeo
Authorized Services should however be
contacted as soon as possible.
When the ignition key is turned to
MARthe warning light comes on but
must go out after approx. 4 seconds.>
Presence of water
in the fuel oil filter
(JTD 20V Multijet versions)
When the ignition key is turned to the
MARposition the warning light should
come on and must go out after approx. 4
seconds.
The warning light switches on fixed
when driving, to indicate the presence of
water in the fuel oil filter.
In case the indicator light switches on,
even if just for a few seconds, we recom-
mend to contact an Alfa Romeo Autho-
rised Service as soon as possible in order
to purge the water from the fuel oil filter
and avoid severe damages to the injec-
tion pump and to the fuel oil supply cir-
cuit as well as the engine irregular opera-
tion.
c
Glowplugs
(JTD 20V Multijet versions)
The warning light comes on
when the ignition key is turned to MAR
position. When the glowplugs have
reached the established temperature the
warning light will go out. Start the en-
gine as soon as the warning light has
gone out.
For versions/markets where applica-
ble, the warning light flashes for approx.
30 seconds after starting the engine
meaning that there is a fault to the glow
plug warning system, in which case,
contact Alfa Romeo Authorized Services.
With a high ambient temperature the
warning light may turn on imperceptibly.
m
The car is fitted with an
electronic braking device
(EDB). If the
>andxwarning
lights turn on at the same time, this
means that there is an EBD system
fault; in this case violent braking
may be accompanied by early rear
wheel locking, with the possibility
of skidding. Drive the car ex-
tremely carefully to the nearest
Authorized Alfa Romeo workshop
to have the system checked.
WARNING

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.

Under no circumstances
should conventional
leaded petrol be used
as this would irreparably dam-
age the catalyst. if the tank is
accidentally filled with leaded fu-
el, even in minute quantity, DO
NOT START THE ENGINE. Do not
attempt to dilute the petrol with
lead free fuel. Drain the entire
fuel circuit and tank.The car must only be
filled with diesel fuel
for motor vehicles, in
compliance with European Stan-
dard EN590. The use of other
products or mixtures may ir-
reparably damage the engine
with invalidation of the warran-
ty due to the damage caused. In
the event of accidentally filling
with another type of fuel, do not
start the engine and empty the
tank. If the engine has been run
even for only a very short time,
in addition to the tank, it is also
necessary to drain out the whole
fuel circuit.DIESEL ENGINES
124
The anti-pollution de-
vices present on the ve-
hicle impose the use of
four-star unleaded fuel with an
octane number (R.O.N.) above 95.
If the catalyst is not
working properly harm-
ful emissions reach the
exhaust resulting in environment
pollution.
REFUELLING
PETROL ENGINES
In order to prevent the vehicle being
Filled with leaded petrol the diameter of
the filler neck is smaller than the nozzle
used on pumps delivering leaded petrol.

189
Circuits operated by relays are the fol-
lowing (fig. 89):
A.Dipped beam headlight
B.Climate control fan
C.Horn
D.Front fog light
F.. Petrol versions (single fan): engine
cooling radiator (high speed)
JTD versions (two-fan): engine cooling
radiator (high speed)
G.Conditioner compressor
H.Petrol versions: engine cooling radia-
tor (low speed)
JTD versions (two-fan): engine cooling
radiator (high speed)L.Fuel pump
M.Electronic injection main relay
N.Starter motor
P.Diesel filter warming (JTD versions)
JTD versions (two-fan): engine cooling
radiator (low speed)
To gain access to relays on the bracket
set behind the left headlight (fig. 91),
remove the cover (A-fig. 90) after
turning the fastening pins (B).Circuits operated by relays are the fol-
lowing (fig. 91):
– Brown base relay: additional heater
(JTD versions)
– Black base relay: engine cooling radi-
ator relay, high speed (JTD versions).
A0D0096m
fig. 90
A0D0110m
fig. 91

192
System/Component Fuse no. Ampere Location
Conditioner compressor 13 7.5A fig. 89
Cruise Control 5 10A fig. 86
Diesel fuel filter warming 23 30Afig. 89
(JTD versions) 5 40Afig. 89
Door mirror defrosting 2 7.5A fig. 93
Electrochromic driving mirror 15 10A fig. 93
Electronic injection control unit 20 10A fig. 89
21 15A fig. 89
22 20A fig. 89
Electronic injection system 16 5A fig. 86
Engine control unit 18 7.5A fig. 89
Engine cooling control unit 16 5A fig. 86
Engine cooling radiator fan 4 60A fig. 89
System/Component Fuse no. Ampere Location
Engine cooling radiator fan 5 40A fig. 89
EOBD system (socket) 18 5A fig. 86
Front LH power window
(ABI control unit) 18 20Afig. 93
Front RH power window
(ABI control unit) 3 20Afig. 93
Front LH seat electric adjustment 6 30A fig. 93
Front RH seat electric adjustment 5 30A fig. 93
Front LH seat warming 9 10A fig. 93
Front RH seat warming 8 10A fig. 93
Fuel pump 19 15A fig. 89
Fuel pump relay coil
(engine bay box) 16 5Afig. 86
Glow plug (JTD versions) 8 60A fig. 89
Headlight washer (intermittent) 12 20A fig. 86
Horns 11 15A fig. 89
I.C.S. system 5 10A fig. 86
6 7.5A fig. 86
7 20A fig. 86
18 5A fig. 86
Instrument panel 6 7.5A fig. 86
18 5A fig. 86