269IS350/250_Navi_U(L/O 0607)APPENDIX(a) Accurate current vehicle positionmay not be shown in the followingcases: When driving on a small angled Y-shaped road. When driving on a winding road. When driving on a slippery road suchas in sand, gravel, snow, etc. When driving on a long straight road. When motorway and surface streetsrun in parallel. After moving by ferry or vehicle carrier. When a long route is searched duringhigh speed driving. When driving without setting the cur-rent position calibration correctly. After repeating a change of direction bygoing forward and backward, or turningon a turntable in the parking lot. When leaving a covered parking lot orparking garage. When a roof carrier is installed. When driving with tire chains installed. When the tires are worn. After replacing a tire or tires. When using tires that are smaller orlarger than the factory specifications. When the tire pressure in any of thefour tires is not correct.INFORMATIONIf your vehicle cannot receive GPSsignals, you can correct the currentposition manually. For informationon setting the current position cal-ibration, see page 92.(b) Inappropriate route guidance mayoccur in the following cases: When turning at an intersection off thedesignated route guidance. If you set more than one destination butskip any of them, auto reroute will dis-play a route returning to the destinationon the previous route. When turning at an intersection forwhich there is no route guidance. When passing through an intersectionfor which there is no route guidance. During auto reroute, the route guid-ance may not be available for the nextturn to the right or left. It may take a long time to operate autoreroute during high speed driving. Inauto reroute, a detour route may beshown. After auto reroute, the route may not bechanged. An unnecessary U-turn may be shownor announced. A location may have multiple namesand the system will announce one ormore. Some routes may not be searched. If the route to your destination includesgravel, unpaved roads or alleys, theroute guidance may not be shown. Your destination point might be shownon the opposite side of the street. When a portion of the route has regula-tions prohibiting the entry of the vehiclethat vary by time or season or otherreasons. The road and map data stored in yournavigation system may not be com-plete or may not be the latest version.
