I currently live in Japan where I bought a 1997 Subaru Impreza WRX STi. Since I don't completely speak Japanese, I wasn't able to ask anybody correctly about one thing that the previous owner had installed, which is a small timer under the steering wheel that does, it seems, different things. Here is the pdf I could find on it
One of the things it does is to prevent my car from shutting down after I turn off the ignition. I can turn towards me and remove the key, and when I do, nothing happens. However, the timer starts, and after 60 seconds, the engine turns off. There is a button that allows me to turn off the engine before the end of the countdown, and when I disconnect the battery to change something, and reconnect it after, the timer's default behaviour is to not activate itself, and in such case the engine will turn off as soon as I turn the ignition off.
My question is, why would somebody want to delay the engine shutdown like this ?