EyeSight shuts off in heat - block diagram?

[mwschell]

The EyeSight shuts off whenever the outside temperature is above 75F. I replaced the EyeSight module module with a used module that I bought and am having the same issue. This issue has been happening for the past couple of years. The EyeSight works fine during the non-summer months and only fails in the summer. I am thinking that there is a temperature issue with whatever module the Eyesight communicates with. Is there a block diagram or schematic of the electrical system available?