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I recently had the same issue and it sounds like it could be fuel related. Have you recently changed the fuel pump or changed the fuel filter? If not there are several other fuel related fuses some in the passenger side fuse box, some in the trunk (which you have found.. but I believe there may be two) and some relays as well. Check all them. If all fuses are okay check to see if your fuel pump is getting power... this can be done by turning your key to the on position and listening under the passenger back seat (this is where your fuel pump is located). You should be able to hear it once you turn your key over to give it power..(now this humming noise will only last for a few seconds so have someone right there while turning the key) if not it is probably the fuel pump....
If you smell gas it is getting gas, if not check the fuel filter. Next thing to check is to see if there is a spark. Remove the spark plug from the engine. Have someone crank the engine with the spark plug grounded, see if there is a spark. Also check for the smell of gas in the spark plug hole.
If the passkey system were not working the engine should not crank and the fuel injectors would be dead. The security light would also stay on. The fuel pump relay gets battery voltage and also voltage from the key switch. The computer grounds the relay to power the pump. The crank sensor does not come into play until the engine is cranking and it supplies a signal for the ignition and injector pulse. Are you not getting power from the key switch to the relay, or from the battery side to the relay ?
you should check to make sure its getting fuel there will be a pressure switch around the intake of the car it will look like a valve stem on a car tire if its gettin fuel the you should check to see if its firing
Need to check for fuel and spark
You can crack the fuel line connector at the back of the rail on the drivers side to see if you are getting fuel or have someone listen in the trunk for a humming/buzzing sound when you first turn the ignition on, if you do hear this then the fuel pump is probably working so it would be the crank sensor that has failed. If you have 1/4 or less of a tank of gas, check to make sure you actually have gas as these cars have faulty fuel sendor units which will stick on a 1/4 of a tank.