Fiat 1996 Brava Service Manual page 341

Bravo !gi 20v
9 8 range
Engine
Fuel system
10.
INERTIA SWITCH
In order to increase the safety of the o c c u ­
pants, in the case of an impact, the vehicle is
equipped w i t h an inertia switch located i n ­
side the passenger compartment, fixed to the
left side panel.
This sensor reduces the risk of fire (as a result
of fuel escaping) deactivating the auxiliary
electric pump which supplies the injection
circuit.
The inertia switch consists of a steel ball fit­
ted in a (tapered) housing and kept in posi­
tion by the attraction force of a permanent
magnet.
If the vehicle is involved in a violent crash,
the ball is released from the magnetic clip and
opens the normally closed (NC) electrical
circuit) interrupting the connection to earth
for the electric pump and as a result the sup­
ply to the injection system.
To restore the connection to earth for the
auxiliary electric pump, the seat must be
moved backwards and the switch pressed
until it is heard to click.
Even after an apparently slight impact, if there is a smell of fuel or there are leaks from the fuel
system, do not turn the inertia switch back on, but first search for the cause of the problem and
remedy it to prevent the risk of fire.
Inertia switch components
1. Complete inertia sensor
2. Outer casing
3. Button
4. Upper side
5. Engagement side
6. Permanent magnet
7. Permanent magnet housing
8. Steel ball
C. Common terminal
N.C. Normally closed contact
N.A. Normally open contact
Copyright by Fiat Auto
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