Code po704. What's most common reason

Connect it to a Scan Tool.

Is the Security Light flashing?

Ideas here

https://www.google.com/search?q=2009+Chrysler+Aspen+cranks+but+won%27t+start

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Please read my notes at the link.

There is crank and cam sensors.If you changed the crank sensor at the front under the front crank pulley and it is in the correct installed position, you should not have a code for that,unless the wiring is defective or the crank sensor is defective.

P0704 Clutch Switch Input Circuit Malfunction http://www.superhonda.com/forum/f94/codes-all-231338

Make and Model ID
Could be the clutch pedal position switch.
Google Search
Code po704 Google Search

A no-start condition can occur with several different symptoms. Have a clear understanding of which one applies to your vehicle when having the problem diagnosed.

Here are the most common symptoms:

• Engine will not turn over (or crank over)
• Engine will turn over (crank) but will not start
• Engine starts and dies (stalls)

If you have replaced the crank sensor and the code comes back, it may be a problem with the wiring harness or connector, or the plate the sensor reads.

take the gas cap off and have some one listen when the key is turned on and listen for a humming if it hums its working you might want to replace the crank sensor that's the most common reason for no start

Hello and welcome to FixYa!

You may have problem with the injector relay. If it's faulty it won't spray fuel, one good reason why it won't run. I suggest that you check the injector relay and replace it.

Hope this helps and thank you for using FixYa! Have a good one!

most likely a failed crank or cam sensor. Without testing its just a guess.