Below is a link to a manual. Although a different model the pump system looks the same..
You may have to join the site to download the manual.
https://drive.google.com/file/d/0BzI...ZaOFVIZDA/view
Open the door during the cycle to be sure that water is actually getting into the unit.
Also that it is getting enough water,
This can be checked by adding hot water after the each fill. Just be careful to not overfill it re: trip the overfill float switch.
Then if it washes OK you know it is a water fill issue.