dashboard FIAT GRANDE PUNTO 2008 199 / 1.G LPG Supplement Manual

5
FIAT PUNTO LPG
The system extreme operat-
ing temperatures are between
-20°C and 100°C.
Selecting the type of fuel supply
The car is configured for running inde-
pendently on either petrol or LPG.
The engine is always started on petrol
with an automatic shift to LPG after about
40 seconds at the first significant acceler-
ation.
This is the time required to reach opti-
mum conditions (engine coolant temper-
ature, minimum revs level) for the switch
to LPG. As far as what has been said
is concerned, there must always be
some petrol in the tank (at least 1/4
full)in order not to compromise the op-
eration of the fuel pump. When running on LPG, when
the last red LED on gas quan-
tity indicator (visible on the
switch) comes on, refuelling is
advisable. If the LPG runs out during
LPG operation, the system automati-
cally switches to running on petrol
shown by: the amber LED coming on
constantly and the green LED flashing,
the fuel level LEDs going out and a
buzzer in the switch.
In addition, it is advisable to periodically
use up the petrol in the tank (until the re-
serve warning light comes on) in order to
ensure that the petrol does not become
old and possibly deteriorate.
The petrol/LPG switch A-fig. 1, located
on the protective fuse flap (left side of the
dashboard) allows the driver to select
petrol or LPG operation at their discre-
tion.
fig. 1F0M0472m
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12
FIAT PUNTO LPG
ELECTRONIC CONTROL
UNIT
The vehicle has a dedicted electronic con-
trol unit for the LPG system; it uses the
incoming signals from the petrol injection
control unit and converts them into sig-
nals for the injection of the LPG.
The control unit for the injectors has the
same strategy as the petrol control unit
(phased, sequential, multipoint).
LPG/PETROL SWITCH
The LPG/petrol switch fig. 7is located on
the protective fuse flap (left side of the
dashboard) and includes:
A. LPG/petrol operating mode request
button;
B. LPG gauge: 5 LEDs, 4 green and 1 red
to indicate the reserve. The red LED on-
ly comes on when the last green LED goes
out.
The red LED indicates the reserve con-
dition;
ON. LPG operating mode indicator:
green LED, located under button A, on
constantly;
OFF. petrol operating mode indicator:
yellow LED, located above button A, on
constantly.
IMPORTANT When the ignition key is
turned to the MARposition the LEDs on
the ignition switch come on in accordance
with the following logic:
– with the petrol operating mode se-
lected: yellow OFFLED on;
– with the LPG operating mode se-
lected: all the LEDs in the switch are on
constantly and the green ONLED is flash-
ing. To select the type of fuel system desired
(LPG or petrol), press the button A-fig.
7.
To change the type of fuel system, it is ad-
visable to operate the button with the ve-
hicle stationary and the engine running or
,whilst driving, after having released the
accelerator.
If the switching takes place during accel-
eration or pick-up, there may be a brief
flat spot (fall in power).
fig. 7F0M0478m
Do not switch between the
two operating modes whilst
starting the engine.
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14
FIAT PUNTO LPG
FUEL CUT-OFF SYSTEM
In the case of an impact to the vehicle, the
petrol supply is immediately cut off caus-
ing the engine to cut out and, as a result,
the LPG safety solenoid valves to close.
For further information, see the “Fuel cut
off system” paragraph in the “Dashboard
and Controls” chapter in the Owner
Handbook.
STARTING
THE ENGINE
The engine is always started on petrol
even with the switch in the LPG position
(green LED flashing, yellow LED on con-
stantly) and switches automatically soon
after.
There must always be some petrol in the
tank to protect the petrol pump.
To carry out the starting manoeuvre cor-
rectly, see the warnings and advice in the
Owner Handbook under the chapter
“Starting the engine” enclosed with this
Supplement.
In this condition it is possible
to continue driving running on
petrol (excluding the LPG fu-
el system). To stop the
buzzer, press button A: the green ON
LED will go out and the yellow OFF
LED will remain on constantly. Go to a
Fiat Dealer as soon as possible to have
the system checked.
System failure signalling
The car has an autodiagnostic system ca-
pable of signalling any malfunctions in the
LPG fuel system through the green ON
LED fig. 7flashing. In the case of faults
that could affect the correct operation of
the engine, the LPG control unit will au-
tomatically switch from LPG operation to
running on petrol.
This condition will be shown by:
– the yellow OFFLED on constantly;
– the green ONLED flashing;
– an acoustic warning from the switch
buzzer (slow frequency).
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