I just purchased a 1997 Acty SDX and have no experience with Kei trucks. Anyway, I've noticed that if the headlights are on, I can turn off the key and remove it, but the engine keeps running. Only if I turn off the headlights will the engine turn off. The truck works great in every other way. Is this some sort of weird JDM or Acty feature or do I need to track down the wiring fault?