12
FIAT PANDA LPG
ELECTRONIC
CONTROL UNIT
The vehicle has a dedicated electronic
control unit for the LPG system; it uses
the incoming signals from the petrol in-
jection control unit and converts them in-
to signals 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 of which 4 green and
1 red to indicate the reserve. The red LED
only comes on when the last green LED
goes out.
The red LED indicates the reserve con-
dition;
ON. LPG operation mode indicator:
green LED on continuously, under the
buttonA;
OFF. petrol operation mode indicator:
yellow LED on continuously, under the
buttonA.
IMPORTANT When the ignition key is
turned to the MARposition the LEDs on
the ignition switch come on in accordance
with the following rule:
–with petrol operation mode se-
lected: yellow LED OFF activation;
–with LPG operation selected: all
LEDs on the switch are on continuously
and the green LED ONflashes.To select the type of fuel system desired
(LPG or petrol), press 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 ac-
celerator.
If the switching takes place during accel-
eration or pick-up, there may be a brief
flat spot (fall in power).
fig. 7F0Z0807m
Do not switch between the
two operating modes whilst
starting the engine.
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14
FIAT PANDA LPG
FUEL CUT-OFF SWITCH
In the case of LPG operation as well, the
safety switch is triggered if the car is in-
volved in an impact immediately cutting off
the supply (safety solenoid valve closed)
and causing the engine to cut out.
For further information, see the “Fuel cut
off switch” paragraph in the “Knowing
your car” chapter in the Owner Hand-
book.
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 from petrol to LPG
automatically soon after.
There must therefore 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’s Handbook under the chapter
Starting the engine enclosed with this
Supplement.
In this situation, you can con-
tinue driving, with the car run-
ning on petrol (excluding the
LPG fuel system). To turn off
the acoustic warning press button A:
the green LED ON will go out and the
yellow LED OFF will remain on con-
stantly. Go to a Fiat Dealer as soon as
possible to have the system checked.
System failure signalling
The car has a self-diagnosis system capa-
ble of signalling any malfunctions in the
LPG fuel system through the green LED
ON fig. 7flashing. In the case of faults that
could affect the correct operation of the
engine, the LPG control unit will auto-
matically switch from LPG operation to
running on petrol.
This condition will be shown by:
– the yellow LED OFF on constantly;
– the green LED ON flashing;
– an acoustic warning from the switch
buzzer (slow frequency).
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