AW: If the vehicle is parked for an extended period of time, the GPS signal may take longer to become sufficient for accurate GPS positioning the next time the engine is started. If you are relying on accurate guidance, make sure the GPS signal is good before entering a destination or driving off. If you drive off with poor or no GPS signal, it may take considerably longer for the system to achieve sufficient accuracy. Else, you may check the position of the GPS receiver and the wiring/connection for a loose contact or broken cable.