I'm sorry that we haven't found a easy solution to this. I just got in from work. I was not able to check in until now. I know you're disheartened. However, we will find and fix this.
When you removed the rubber accordXXXXX XXXXXke boot that goes to the pump did you also have someone turn the drum slowly to see if something else came around toward the boot? Please do that if you haven't already.
Above you indicated that you have the Service Repair Manual for this machine. There should be a series of tests including those that are diagnostic for the CCU. Are they in your manual?
I can go thru them. However, it's much faster if we can reference what is already there.
However, we need to eliminate two things first.
Please try this. Check that the wiring to the pump that you talk about above is tight and secure and reassemble the rubber boot on to the pump. Take the drain hose out of your house drain stack. Put a large bucket of water on the top of the washer and hold the drain hose at the top of the bucket. You should only have the original drain hose on the machine (approximately 4 feet long). The hose should go up to the top the machine. Unplug the washer. Wait 10 minutes. Plug the washer back in. Have someone start the washer on the shortest wash while you hold the hose. Be prepared to stop the machine if the bucket becomes full.
Let me know what happens when you do this. Please tell me everything that you see.
If nothing has changed, please go to this next -
I would like to you test the pressure switch which is shown is on page 5-2 of the repair manual. This tells the washer that the is water in tub. I'm looking to find your problem quick and not have you buy a part that doesn't fix it.
Let me know if you can't find the pressure switch test and I will get that to you.
If you find it, let me know how the pressure switch tests out.