Oops... I forgot to answer your question. Sorry...
A turbo timer is a device that delays the engine shut-off of your vehicle, even after you've turned the ignition off, depending on the settings you've programmed in and length of time you've driven with the engine's turbo engaged.
I'm told that the purpose is to allow the turbo air-chamber in turbo-diesels to cool down and prevent damage to the turbo.
The device actually leaves the engine running for some time, even after you've turned the ignition off, locked your vehicle and walked-away.
