According to the wiring diagrams there is no "impact switch for the fuel pump" but a signal might of been sent from the airbag control module to the engine ecu to say the vehicle has had a collision to prevent the engine ecu from energising the the fuel pump relay, only a diagnostic readout check will be able to reset this most good independant garages will be able to do this a lot cheaper than the main stealership garage
nigel
January 2009