* Inertia Switch: This switch, often located under the dash or in the engine compartment (its location varies), will cut power to the fuel pump in a significant collision. This is a *passive* safety feature; it doesn't require any driver action.
* Computer Control: The fuel pump is controlled by the engine control module (ECM). If the ECM detects a problem, it can cut power to the fuel pump.
* Other Safety Circuits: Various other sensors and circuits monitor conditions (like engine speed, crankshaft position, etc.) If something is amiss, the ECM can again cut off the fuel pump.
In short, while there's no manual switch, multiple safety mechanisms exist to prevent fuel flow in the event of a crash or malfunction. If you need to shut off the fuel supply in an emergency (like a fire), disconnecting the fuel pump's electrical connector is the best method, but this requires some mechanical knowledge.
