Section 739 (Navigation/Telecommunication (Service Information)): Operation: Navigation

WARNING: This page is about a different car, the 2020 Chrysler 300 and 2019 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

The optional navigation system is active whenever the Radio Receiver Module (RRM) electronic display is powered ON. In vehicles equipped with a navigation system that allows activation after the vehicle has been delivered, all post delivery activations must be performed by the dealer.

If a navigation system menu or map isn't being actively displayed, the system is still operating in the background. The menu, map or route that was active when the RRM electronic display was powered OFF along with all other user-relevant information is saved in nonvolatile memory by the navigation module for display again the next time the RRM electronic display is powered ON and the navigation system is selected.

Once a destination is selected, the navigation system uses information from stored map data to quickly calculate a route. As the vehicle is driven along that route, the vehicle operator is guided with visual displays and voice prompts. Any variances from that route will cause the navigation system to automatically recalculate and deliver a revised route to the chosen destination.

When Turn-By-Turn Navigation is enabled through the Personal Settings menu of the Electronic Vehicle Information Center (EVIC), the EVIC supplements the RRM display with a more focused turn-by-turn display which includes: the name of the approaching crossroad, an arrow indicating the upcoming turn direction and a countdown to indicate the distance to that turn.

All vehicles have their original map and Points-Of-Interest (POI) data stored in nonvolatile flash memory integral to the navigation module integral and internal to the RRM. Updated map and POI data as well as updated navigation software for these vehicles can be uploaded to the system using Universal Serial Bus (USB) media. The originally installed data is based upon the market for which the vehicle was manufactured. Navigation software updates are also uploaded to the system using USB media.

The Global Positioning System (GPS) receiver of the navigation module is capable of acquiring and tracking GPS signal inputs through the roof-mounted combination antenna from numerous satellites simultaneously to calculate and display the position and direction of the vehicle. However, when access to satellite signals is blocked by bridges, tunnels or other obstacles, the navigation module relies upon Dead Reckoning (DR) to aid in calculating vehicle position and direction. The navigation module uses pulse signals from the wheel speed sensors, a Reverse gear indicator input and an internal electronic gyroscope sensor to provide DR vehicle position and direction calculations to supplement GPS satellite signals.

User input mechanisms for the navigation system include the RRM touchscreen and the Uconnect® Hands Free Voice Recognition (VR) verbal commands. The VR function uses Advanced Speech Recognition (ASR) software. Master control of the VR function is handled by the VR engine internal and integral to the RRM. The VR recognizes and responds to certain global commands, while other commands are specific to the RRM or the navigation system.

For safety reasons some input, editing and setting features of the navigation system are restricted when the vehicle is in motion or when a hands free phone call is active. This includes many features that require touchscreen inputs. However, many of those same features disabled for touchscreen inputs remain enabled for Uconnect® Hands Free VR inputs.

The navigation module receives electronic message inputs within the RRM over the Controller Area Network - Interior High Speed (CAN-IHS) data bus; however, the RRM is not a CAN gateway. All electronic message outputs of the navigation module and the RRM are carried over the CAN-IHS data bus. When the RRM monitors a problem in any of the audio system circuits and components, or in any of the navigation system antenna circuits, it stores a fault code or Diagnostic Trouble Code (DTC) in its memory circuit. The external combination antenna may be diagnosed separately from the RRM.