[seren]

If this is provided by a third-parties, there is a requirement written somewhere for the supplier to have two different modes of operation, one for test and one for road. This is likely redacted to be innocent sounding, but there is definitely a DOORS history that would give the date and the name of the people who have written the requirements.

However there might be some good reason to have a test mode, for engineering tests, for example. The culprit would be the one who have decided to ship it and activate in production.

[cakes]

This is definitely a question I have especially since in my experience sometimes you had trade-offs due to other restrictions so every functional item needed to have value and new functionality may require removing/changing/disabling other functionality.