Fiat 1996 Brava Service Manual page 455

Bravo-Brava $ i* Engine
'98 range Fuel system
10.
VEHICLE SPEED SENSOR
(SOGECO)
The sensor is positioned at the differential
output, near the left drive shaft coupling, and
it transmits to the control unit the vehicle
speed information: the signal is also used for
the operation of the speedometer.
The sensor is of the Hall-effect type (see
"timing sensor" sub-section), and transmits
16 pulses/revolution; thus the vehicle speed
can be obtained on the basis of the pulse fre­
quency.
Removing - refitting
Disconnect the wiring connection and re­
move the sensor.
^ ^ ^ Tightening torque 0.8 daNm
Wiring diagram
SAFETY AND VENTILATION VALVE
This valve is located in the fuel filler and it
performs the following functions depending
on the pressure in the tank:
- When the pressure inside the fuel tank ex­
ceeds 0.13 - 0.18 bar, it discharges the sur­
plus vapours to the outside (safety func­
tion).
- If instead there is a vacuum in the tank of
0.020 - 0.030 bar, it allows air to enter
(ventilation function).
-Z.
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