My 1994 Lexus sc400 keeps cutting off when I am about to slow down or stop the car?
What is the Lexus warning light that looks like a box with vertical lines inside and is located at the top left corner of the dash in a 1994 Lexus SC400?
The only legal way to acquire that information would be to obtain the factory service manuals for the car. You might get lucky and find them on eBay (digital versions are not legal version of that manual -- paper only). You can also order them from Lexus through a Lexus dealership for approximately $150.
On the Lexus it is designed to give you so many seconds to roll up the electric window or close the moonroof even with the key turned off, then it starts beeping at you to let you know that this feature will soon deactivate. It has to do with arming the alarm, so there is nothing wrong with you car.