Last Spring, I repaired my Maytag dishwasher that has been non-operative for about 6 months. You will probably not fins a detailed electrical diagram. Service is at the module level only.
For such appliances in the US, a high-level design and limited trouble shooting guide is folded and placed behind some service panel. I found the trouble shooting of limited help. It did not identify the problem, but it did help me identify flaky tactile buttons on the control panel, which had to be replaced as a unit.