Call Toyota out would be the best option as fiddling around with the setting's unless you know what your doing can make matters even worse.

Some of the settings also affect the SAS functions & this is safety critical!

Ask the Toyota engineer to change the password on the dash & cross your fingers whoever has been fiddling in there before hasn't already changed it!

Make sure whoever is in overall charge makes note of the new password OR get a copy of the job sheet with the new password recorded on.

This is the main reason why I don't like the dash access system, much prefer it if a can key or Truck Com could be used instead, far to many people out there have worked out how to get in the dash.

Also to add to this, the Auto-balance settings on Tilt now doesnt work.
And the steering is off centre.

Really old truck that no one knows anything about, i think the guy fluked his way into the main settings. As no matter which way i try i cant get in.