2013 Lexus GS 350 Navigation Manual - Page 130

5. GPS (GLOBAL POSITIONING SYSTEM) Accurate current position may not be shown in the following cases: • When driving on a small angled Y-shaped road. • When driving on a winding road. • When driving on a slippery road such as in sand, gravel, snow, etc. • When driving on a long straight road. • When motorway and surface streets run in parallel. • After moving by ferry or vehicle carrier. • When a long route is searched during high speed driving. • When driving without setting the current position calibration correctly. • After repeating a change of direction by going forward and backward, or turning on a turntable in a parking lot. • When leaving a covered parking lot or parking 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 or larger than the factory specifications. • When the tire pressure in any of the 4 tires is not correct. If the vehicle cannot receive GPS signals, the current position can be adjusted manually. For information on setting the current position calibration, see page 128. Inappropriate route guidance may occur in the following cases: • When turning at an intersection off the designated route guidance. • If you set more than 1 destination but skip any of them, auto reroute will display a route returning to the destination on the previous route. • When turning at an intersection for which there is no route guidance. • When passing through an intersection for which there is no route guidance. • During auto reroute, the route guidance may not be available for the next turn to the right or left. • During high speed driving, it may take a long time for auto reroute to operate. In auto reroute, a detour route may be shown. • After auto reroute, the route may not be changed. • If an unnecessary U-turn is shown or announced. • If a location has multiple names and the system announces 1 or more of them. • When a route cannot be searched. • If the route to your destination includes gravel, unpaved roads or alleys, the route guidance may not be shown. • Your destination point might be shown on the opposite side of the street. • When a portion of the route has regulations prohibiting the entry of the vehicle that vary by time or season or other reasons. • The road and map data stored in the navigation system may not be complete or may not be the latest version. 138 GS350/450h (US) NAVI 30C46U 11.12.13 07:32