AC issue

[StarWing]

Hi, first post on this forum and immidiately a tech question.

My wife drives a 1st gen yaris (2004) and earlier this week the car went to the dealer for an airbag recall.
The job took about 1h to complete.
After this, the A/C wasn't working anymore. The compressor doesn't start (hearable) and the A/C control light doesn't come on.

I've checked the A/C fuse (7.5A) and the accessible connectors behind the fusebox and glovebox but they are all ok.

So, to be prepared for the discussion with dealer, could the malfuntioning of the AC be related to the actions regarding the recall ? I have no clue whatsoever about the technical details of the recall.

I also searched the internet for an electrical diagram of the A/C system, but I can't seem to find it. I found out that there should be an A/C control unit somewhere, but I found some conflicting info about the location of this box.
If this control box exists, where can I find it or other parts of the A/C system ? (relays, ...), and could it be that the control box was removed while working on the recall job ?

Thanks !!!