Navigation System Limitations

To minimize distractions, always use the voice control system to operate the navigation system while driving. Always verify the audio and visual route information by carefully observing roadway signs, signals, etc. Use your own good judgment, and obey traffic laws while driving.

The navigation system has these limitations:

^ Occasionally, the navigation system may "reboot" due to excess cold, heat, or shock, or from recalculating a route too many times. Rebooting does not necessarily indicate a need for service.

^ The GPS (global positioning system) satellites used by the navigation system are operated by the U.S. Department of Defense. For security reasons, certain inaccuracies are built into the GPS. This can cause occasional positioning errors of up to several hundred feet. If the navigation system indicates your position incorrectly, wait several seconds until it corrects itself. The system may also correct itself after you make a turn or cross a road.

^ The routes calculated by the system may not always be what you consider to be the most direct ones. Try different routing methods to obtain the best route. Even the direction your vehicle is pointing influences the route calculation.

^ The GPS antenna (located under the center of the dash) receives location information from orbiting satellites. Anything that blocks or interferes with the signal will affect accuracy. The GPS signal can be blocked or interfered with (vehicle position shown incorrectly on the map) by:

- Aftermarket metallic window tinting above or to the sides of the GPS antenna.

- Aftermarket vehicle theft location systems mounted near the navigation control unit or display.

- Radar detectors, cell phones, or other aftermarket electronic accessories placed near the navigation control unit or display.

- Outside electrical interference from overhead power lines or broadcast sources.

- Tall trees or buildings near or over the vehicle. They can cause the system to show the vehicle on an adjacent street. This should automatically correct itself when the obstruction is gone.

^ If the location of your dealership is shown incorrectly or needs to be changed, report it to your service manager or DPSM. The reporting form is on ISIS.

^ If the DVD door in the control unit is opened or the DVD removed, the system will reboot. A DVD with a white label is used for this system. It cannot be interchanged with a DVD from a different vehicle that has a different-colored label. Do not unnecessarily handle the DVD. Scratches on the DVD can affect the operation of the system.