Originally Posted by Rob M

I thought the same at first; thinking that a no start with crank would be the result of the fuel pump relay not enabling the fuel pump to operate thus starving the engine of fuel. However, if the fuel pump relay malfunctions to the point were it won't close at all, the PCM disables the ignition/starter so you get no crank. The engine control relay, when closed, allows the PCM to communicate to the fuel injectors to deliver fuel. If it is not operating properly, the engine can still crank, and sometimes even start but once it malfunctions the fuel injectors won't get the current they need to work.