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I assume that you have no spark. You should check the crank sensor connection as the pins on the connector sometimes loosen up. You shuld also check the eec/pcm relay inside the IRCM. Here is a schematic to make sure you also have all your powers to the coils and module. The Integrated Relay Control Module is located at the RH front of the engine compartment, mounted on the upper radiator support.
The Crankshaft Position Sensor is located at the lower RH front of the engine. The a/c compressor will be in the way if removing the sensor.
Tell them to just try wiggling the connector and see if it will start. Also check the ircm to make sure it's operating properly. If you have any questions about the wiring diagram let me know.