Inertia Fuel Shutoff Switch: Description and Operation

Inertia Fuel Shutoff (IFS) Switch

In the event of a collision, the electrical contacts in the inertia fuel shutoff switch (IFS switch) open and the fuel pump automatically shuts off.

- The fuel pump will shut off even if the engine does not stop running. However, the engine will stop a few seconds after the fuel pump stops.

- It is not possible to restart the engine until the inertia fuel shutoff switch is manually reset.

Caution: Do not reset the inertia fuel shutoff switch until the fuel system has been inspected for leaks.

- To reset the inertia fuel shutoff switch, press the button on top of switch.

Note: In the reset position it is possible to force the button down an additional 1.59 mm (1/16 inch) against a spring load.
This is a normal condition.