Fiat 1996 Brava Service Manual page 335

Bravo ©
98 range
1
F54-
1
A *
(
+:
> i
>
JO
i 4 5
F57
I-F63
I—F25
Engine
Fuel system
10.
Wiring connector
The numbers indicate the corresponding con­
trol unit pins.
BUTTERFLY CASING ACTUATOR
The actuator is fixed to the inlet chamber and
regulates the quantity of air drawn in by the en­
gine.
According to the signal coming from the accel­
erator pedal potentiometer, the injection control
unit control the opening of the butterfly by
means of a direct current motor incorporated in
the butterfly casing actuator.
The butterfly casing actuator is fitted with two
potentiometers connected in parallel so that
one controls the other and viceversa.
If there is a problem with the two potentiome­
ters or if there is no supply, the control unit re­
duces the engine torque, according to the posi­
tion of the accelerator pedal.
If the butterfly casing actuator or the injection
control unit are replaced, the following "self-
- learning" procedure must be carried out:
- Place the ignition key in the ON position and
keep it in this position for 30 sees
- Place the ignition key in the OFF position for
5 sees
- Return the key to the ON position and start up
the engine
Wiring connector
The numbers indicate the corresponding con­
trol unit pins.
Copyright by Fiat Auto
29