How to find which zone on Rain Bird sprinkler system is for backyard?

Question

When we did pavers in the backyard, contractor simply capped off sprinklers and did pavers. That means, if sprinklers are running in the backyard, I cannot see it.

1. We have Rain Bird ESP-RZX sprinkler system.
2. We have total of 4 zones.
3. When I run zone 1, I can see sprinklers sprinklers in the front yard working. I cannot see anything in the backyard because of pavers.
4. When I run zones 2,3 and 4, I don't see anything in the front yard also anything in the backyard because of pavers.

Here are all the pics, that I know of, that are related to sprinklers:

I have this fear that zone 1 is also activating sprinklers in the backyard and it will cause issues with foundation.

How can I be sure that zone 1 is also not activating sprinklers in the backyard?

To further clarify my statement "I cannot see anything in the backyard because of pavers.", here is the photo of my backyard:

This is what the wiring of the Rain Bird looks like:

For people asking, if it is capped off why worry? I have this fear that maybe one of the sprinklers is not closed properly and it is leaking below the pavers and I can't see.

Answer 1

I'd suggest running zones 2-4 and checking the water meter to see if it's indicating water flow.

Unfortunately, that will not tell you if you're pumping water out through a broken pipe or missed sprinkler head on zone 1 if zone 1 also covers the back yard as you are concerned. The only way to test that would be to cap all the sprinklers in the front yard, turn on zone 1 and check the meter to see if water is flowing. (Make sure nobody is doing dishes, taking a shower, using the bathroom, etc. while testing this.)

It probably won't be much fun, and it'll probably take time and cost you to cap off all the sprinkler heads then reinstall them when you're done testing. But, if you're that paranoid about there being issues under the patio in the back, it's the only realistic way of testing it out.