Instruments - Navigation System Description/TQI: Overview
02-030October 21, 2002
Applies To:
2003 MDX - ALL
TQI of the Voice Recognition DVD Navigation System
BACKGROUND
This bulletin provides information for Total Quality Inspection (TQI), including testing, of the navigation system. These topics are covered:
^ Navigation System Controls
^ Voice Control System Operation
^ Navigation System Operation
^ Map Coverage Areas
^ Navigation System Setup at TQI
For more detailed information on system operation, refer to the Navigation System Owner's Manual.
WARRANTY CLAIM INFORMATION
None; these procedures are considered part of normal TQI.
Skill level: Repair Technician
NAVIGATION SYSTEM CONTROLS
SCREEN - All selections and instructions are displayed on the screen. This touch-screen display uses infrared beams that are interrupted by your finger to determine what selection has been made. Because of this, you do not need to push on the screen; all you do is touch your selection. If the system doesn't accept your selection (nothing happens), try moving your finger slightly on the selection; do not push against the screen. You can also use the joystick or the voice control system to make a selection.
MENU button - Press this button to change the display from the current screen to the Main menu. When en-route to a destination, press this button to change routing parameters.
MAP/GUIDE button - Press this button to display a map of your current position for casual driving. When en-route, press this button to switch between the map and route information.
A/C-INFO button - Press this button to display the menu for selecting Setup, Trip Computer, Voice Command Help and Calendar, and the semiautomatic operation controls for the climate control system.
CANCEL button - Press this button to return to the previous screen.
ZOOM buttons - Press these buttons to change the scale when displaying a map. ZOOM down allows you to zoom out to see a larger area and ZOOM up allows you to zoom in for greater detail. When a list is displayed, ZOOM up and ZOOM down can be used to page up or page down.
JOYSTICK - The joystick moves left, right, up, and down. Use it to highlight menu selections, scroll through lists, or look around in maps. After making a selection in a menu or list, choose the selection by pushing in the joystick. You can also choose a selection by touching it on the screen, and in most instances, you can use the voice control system to make a selection.
VOICE CONTROL SYSTEM OPERATION
The navigation system features a highly sophisticated voice control system. This system uses voice recognition to permit hands-free operation of most of the navigation functions.
The voice control system consists of the TALK and BACK buttons on the steering wheel, and a microphone on the ceiling. The audio speakers are used for voice prompts.
NOTE:
The front speakers are muted when the voice for the navigation system is speaking, and all speakers are muted when using the TALK and BACK buttons.
TALK button - Press this button to activate the voice control system to accept voice commands.
BACK button - This button has the same function as the CANCEL button. Press this button to return to the previous screen.
Microphone - The microphone picks up your voice commands.
Using the Voice Control System
The voice control system is activated with the TALK button. To control the navigation system by voice, press and release the TALK button, then pause a moment before you give a voice command. Once the voice control system understands your command, it updates the navigation system, and may prompt you for additional commands, depending on the next screen.
NOTE:
To view a complete listing of the voice commands, refer to the Navigation System Owner's Manual, or press the A/C-INFO button and select Voice Command Help.
Improving Recognition
To achieve optimum voice recognition, the following guidelines should be followed:
^ Make sure the correct screen is displayed for the voice command you are giving.
^ Close the windows and the moonroof.
^ Set the fan speed to low (1 or 2).
^ Adjust the air flow from the vents so that it does not blow against the microphone on the ceiling.
^ Pause after pressing the TALK button, then give a voice command.
^ Give a voice command clearly in a natural speaking voice without pausing between words.
^ If the system cannot recognize your voice command, speak louder.
^ If the microphone picks up voices other than yours, the system may not interpret your voice commands correctly.
^ If you speak a command with something in your mouth, or your voice is too husky, the system may not interpret your voice commands correctly.
NAVIGATION SYSTEM OPERATION
Selecting a Destination
A destination can be selected by Address, Intersection, Place, Personal Address, Previous Destination, Map Input, or Today's Destinations using the touch-screen, the joystick, or the voice control system. Refer to the Navigation System Owner's Manual for detailed information.
Traveling to a Destination
Confirm a selected route - The system display asks you to select one of the following route options:
^ Direct Route - Takes the least amount of time
^ Easy Route - Minimizes the number of turns
^ Minimize Freeways - Avoids freeway travel (when possible)
^ Minimize Toll Roads - Avoids toll roads (when possible)
^ Maximize Freeways - Incorporates freeway travel (when possible)
Going off the route - If you leave the route, the system recalculates the route from your current position, and displays a new highlighted route. If you leave your highlighted route and enter an "unverified" area, the guidance stops and a blue dotted vector line points to your destination. You should stop the vehicle and review the map for the best route to your destination.
Modifying the route - The system can recalculate portions of the route and/or avoid a specific street, and then return you to the current route.
Save current location - This option stores the current location for later use (it does not change or cancel the route instructions currently in progress). A location can be stored any time the navigation system is in use.
Personal Addresses
Two users can each store up to 100 destinations (addresses with phone numbers) in the system. A PIN (Personal Identification Number) is optional. Refer to the Navigation System Owner's Manual for instructions on how to enter a PIN and use Personal Addresses.
Go Home
This option allows a single button entry to set your home address as a destination. A PIN is optional.
System Limitations
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:
^ 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.
^ Since businesses fail or move to new locations, some information may be inaccurate. Also, route guidance may conflict with actual road conditions such as street closures, construction, and detours.
^ Occasionally, the navigation system may "reboot" due to excess heat or shock, or from recalculating a route too many times. Rebooting does not necessarily indicate a need for service.
^ GPS reception is affected by outside electrical interference from aftermarket electronic devices placed near the GPS antenna or navigation unit. Aftermarket metallic tinting of windows above the GPS antenna can seriously degrade the GPS signal.
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