Inertia safety switch

INERTIA SAFETY SWITCH

To increase car occupant safety in the case of impact, the car is fitted with an inertia switch located inside the passenger compartment secured to the inside of the left panel.

This sensor reduces the possibility of fire (due to emerging fuel) by deactivating the auxiliary fuel pump that supplies the injection circuit.

The switch consists of a steel ball, fitted in a tapered housing, kept in place by the attraction force of a permanent magnet.

In the case of violent impact, the ball is released from the magnetic detent and opens the normally closed (NC) electrical circuit to cut off the auxiliary fuel pump connection to earth, and as a consequence the supply to the injection system.

To restore the auxiliary pump earth connection, move back the seat and press the switch until a click is heard.

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 switch back on, but search for the fault and remedy it to prevent the risk of fire.

Inertia switch components

1. Inertia switch assembly
2. Sheath
3. Button
4. Upper side
5. Engagement side
6. Permanent magnet
7. Permanent magnet seat
8. Steel ball

C. Shared terminal
N.C. Normally closed contact
N.A. Normally open contact