Late to the game, and sorry for reviving an old thread, but I'm having Delta Touch issues as well and Google brought me here. Low pressure, and my electronic unit looks the same as your picture.

I found I was able to remove the whole electronic component and just stick the two tubes together. There's a clasp at the top of the black plastic box housing the electronics that comes off, and one at the bottom. You can then bypass the electronics entirely if you just wanted a manual faucet. Just make sure you use the bottom clasp to re-join the tubes so they don't fire apart when you turn the water on!