Fiat Bravo Service Manual page 195

Engine
Fuel system
10.
48
I N E R T I A S A F E T Y S W I T C H
Bravo-Brava
The vehicle is equipped with an inertia
switch located inside the passenger compart-
ment beneath the driver's seat.
This sensor reduces the possibility of fire
(caused by fuel emerging from the injection
system) by de-activating the fuel feed pump.
The switch consists of a steel ball fitted inside
a tapered housing. It is held in position
through the attractive force of an permanent
magnet.
The ball is released from the magnetic force
in the case of violent impact, when it opens
the normally closed (NC) electrical circuit to
cut off the fuel pump earth connection and
thus the fuel supply to the injection system.
To restore the pump earth connection, push
the seat back and press the switch until it
clicks on.
Removing-refitting
1. Move driver's seat back fully, unscrew the
bolts indicated and remove the plastic
protection.
2. Unscrew the bolts indicated, disconnect
electrical connection and remove
switch.
After even an apparently light colli-
sion, if a smell of petrol is noted or fu-
el leaks are seen, do not activate the
switch again until the fault has been
found and corrected in order to avoid
the risk of fire.
Inertia s w i t c h components
1. Inertia switch assembly
2. Sheath
3. Button
4. Upper end
5. Fitting end
6. Permanent magnet
7. Permanent magnet seat
8. Steel ball
C = Common terminal
N.C. Normally closed
N.A. Normally open
10
16v
the
Publication no. 506.670