Fiat 1996 Brava Service Manual page 333

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Engine
Fuel system
10.
ACCELERATOR PEDAL POTENTIOMETER
(0.281.002.203)
The position of the accelerator pedal is trans­
formed into an electrical voltage signal and
sent to the injection control unit by the po­
tentiometer connected to the appropriate
pedal.
The accelerator pedal position signal is pro­
cessed together with the information relating
to the engine speed to obtaine the injection
times and pressure.
The sensor is made up of a casing (1) fixed to
the pedals by a flange, which contains a shaft
(2), in an axial position, connected to two
potentiometers (3): one main one and one
safety one.
A coil spring on the shaft guarantees the cor­
rect pressure resistance, whilst a second
spring ensures the return on release.
Wiring connector
The numbers indicate
control unit pins
the corresponding
BRAKE PEDAL SWITCH
There is a switch (1) on the brake pedal
which operates the brake lights; the same
switch sends a signal to pin F27 of the in­
jection control unit.
The "brake pedal pressed" signal is used
by the control unit for:
- understanding that there is a decelera­
tion situation;
- checking the plausibility of the signal
coming from the accelerator poten­
tiometer.
CLUTCH PEDAL SWITCH
There is a switch (2), on the clutch pedal, connected to pin F59 of the injection control unit.
The "clutch pedal activated" signal is used by the injection control unit to distinguish the gear engaged
and gear shift conditions.
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