The water does not shut off on the toto wash let E200 The control panel does seem to activate to shut off the water or wand

Start cleaning flapper. If it does not work then replace toilet flapper.

test water level switch and water inlet valve

Sounds like the washer in the shutoff at the wall has failed and is partially blocking the fill pipe. Some rubber from it may have gotten into the toilet valve internally. With the wall valve closed, try to remove the connection pipe to the toilet. If you can do it without water continuing to flow out of the wall shut off...then remove the pipe from the wall shut off. Flush the toilet. Now, apply air pressure to the rubber hose the goes into the overflow pipe. That may clear the valve in the tank and solve both problems. If you cannot stop the water at the wall shut off, close the water valve feeding the house. Remove static water pressure by opening the cold water a the kitchen sink faucet. Now you can open the wall shutoff valve and replace the washer and clean it out....

You may have another malfunction here. Get your manual and see what it says under troubleshooting.

Try removing tip on wand 9 out of 10 times sand or grit will plug spray orifice

i would think the syphon is not closing after the flush, so as the cistern fills it just runs straight into the pan. you'll need to replace the syphon...

Yes, IT may also be a faulty trigger as well, if you can, manually activate the trigger and verify if there is a shut off.

My Toto Washlet has stopped squirting water. Any ideas for fixes?

flapper is leaking or worn letting water run thru

If you are using well water you might want to upgrade your filtration system.or add a mixing valve to the water supply of your washlet and add a filter there, you answer your own question you have very hard water.So the product is getting abnormal; wear and tear. Without making changes to your water supply you will continue to prematurely go thru fixtures,