2005 Subaru Legacy Owner's Manual - Page 215

Instruments and controls Light control switch UB3540AA The journey time indication flashes each time a complete hour has elapsed. If the display is giving an indication other than the journey time, the display switches to the journey time, flashes for five seconds, and returns to its original indication each time a complete hour has elapsed. To prevent battery discharge resulting from accidentally leaving your lights on when your vehicle is parked, the light switch operates only when the ignition switch is in the "ON" position. In any other position, the vehicle's lights will be out. If you park your vehicle on a roadside at night, use the hazard warning flasher to alert the other drivers. The light switch operates only when the ignition switch is in the "ON" position. NOTE The journey time is reset when the ignition switch is turned to the "OFF" position. It is also reset if the ignition switch is turned to the "LOCK" or "ACC" position prior to restarting of the engine. 3-44