Part Two

Navigation System Description


Precision of GPS

The precision of the GPS varies according to the number of satellites from which signals are received and the view of the sky. The accuracy is indicated by the color of the GPS icon shown on the display.






GPS Antenna

The GPS antenna amplifies and transmits the signals received from the satellites to the GPS receiver.

GPS Receiver and Clock

The GPS receiver is built into the audio-navigation unit. It calculates the vehicle position by receiving the signal from the GPS antenna. The current time, vehicle position and signal reception condition is transmitted from the GPS receiver to the audio-navigation unit to adjust vehicle position and the clock in the audio-navigation switch panel display.

Audio-Navigation Unit

The audio-navigation unit calculates the vehicle position and guides you to the destination. The unit performs map matching correction, GPS correction, and distance tuning. It also controls the menu functions and the HDD, and interprets voice commands. With control of all these items, the audio-navigation unit makes the navigation picture signal, then it transmits the signal to the navigation display unit.

Calculation of Vehicle Position

The audio-navigation unit calculates the vehicle position (the driving direction and the current position) by receiving the directional change signals from the yaw rate sensor and the travel distance signals from vehicle speed pulse (VSP) signal of the PCM.

Map Matching Tuning

The map matching tuning is accomplished by indicating the vehicle position on the roads on the map. The map data transmitted from the HDD is checked against the vehicle position data, and the vehicle position is indicated on the nearest road. Map matching tuning does not occur when the vehicle travels on a road not shown on the map, or when the vehicle position is far away from a road on the map.

GPS Tuning

The GPS tuning is accomplished by indicating the vehicle position as the GPS's vehicle position. The audio-navigation unit compares its calculated vehicle position data with the GPS vehicle position data. If there is large difference between the two, the indicated vehicle position is adjusted to the GPS vehicle position.

Distance Tuning

The distance tuning reduces the difference between the travel distance signal from the VSP and the distance data on the map. The audio-navigation unit compares its calculated vehicle position data with the GPS vehicle position data. The audio-navigation unit then decreases the tuning value when the vehicle position is always ahead of the GPS vehicle position, and it increases the tuning value when the vehicle position is always behind the GPS vehicle position.

Traffic Information

The Acura navigation system's real-time traffic feature helps you avoid traffic delays by providing up to the minute traffic information in many metropolitan areas across the contiguous USA. Color coded freeways appear on the navigation screen, displaying current traffic flow, and/or the locations of accidents and traffic conditions affected by construction and weather. Real-time traffic data services are offered on a subscription basis for a nominal fee following the 90-day free trial period.

Weather Information

The Acura navigation system's weather information option allows you to view the weather forecast, warning list, warning map, and weather radar. The weather information is available in a subscription basis for a fee following the 90-day free trial period.

Dynamic Route Guidance

The audio-navigation unit can calculate different routes to a selected destination. You have five options:

- Direct Route-Calculate a route that is the most direct.
- Easy Route-Calculate a route that minimizes the number of turns needed.
- Minimize Freeways-Calculate a route that avoids freeway travel. If that is not possible, keep the amount of freeway travel to a minimum. This is not selectable (button grayed out) for trips greater than 100 miles.
- Minimize Toll Roads-Calculate a route that avoids, or minimizes travel on toll roads. This is not selectable (button grayed out) for trips greater than 100 miles.
- Maximize Freeways-Calculate a route that uses freeways as much as possible.

Audio Guidance

The audio-navigation unit transmits audio driving instructions before entering an intersection or passing a junction. The audio instructions come through the stereo amplifier to the front speakers.

NOTE: The front speakers are muted whenever the navigation system is giving guidance commands, and all of the speakers when the voice control system is being used.

Muting Signal Logic

The audio muting logic is orchestrated by the audio-navigation unit. The audio-navigation unit determines what audio source has priority to use the speakers.

The priority of the audio sources is as follows:

HFL has the highest priority, followed by navigation, and finally the radio/CD-DVD player. The priority is passed by HFL to the audio-navigation unit by dedicated mute wires. The navigation mute signal is passed to the stereo amplifier.

The audio-navigation unit temporarily disables the voice control buttons, but allows guidance to be heard. In addition, the audio-navigation unit suppresses the output from the audio system, the XM receiver, the disc player, or other audio accessories.

When the navigation system sends out a voice route guidance command, the audio front speaker is muted, and the navigation voice is heard in the front speakers.

When the navigation voice control system is in use, all of the speakers are muted, and the navigation voice prompts are heard from the front speakers.

Solar Angle

The climate control unit uses the sun's angle, along with the sunlight sensor to control the driver/passenger A/C air flow.

Off Road Tracking (bread-crumbs)

Off road tracking dots that can be followed on the map retrace your route back to a mapped (digitized) road.

Clock and Time Zone

The clock set up allows you to set daylight savings time, auto time zone and time adjustment.

Control Interface





Navigation Display Unit

The display unit uses a liquid crystal display (LCD). The LCD is a 8-inch-diagonal, thin film transistor (TFT), strip type with 336,960 picture elements. The color film and fluorescent light are laid out on the back of the liquid crystal film.

TALK Button

Activates the voice control system in the audio-navigation unit to accept voice commands.

NOTE: If the navigation volume and/or voice feedback is turned off, this feature is disabled.

BACK Button

Returns the display to the previous screen (similar function as the CANCEL button).

PICK-UP Button

This button is used to answer incoming calls or to make outgoing calls. You can also go directly to the Cellular Phone screen by pressing this button.

HANG-UP Button

This button is used to end a call.

Audio Remote, HFL-Navigation Voice Control Switch

The navigation voice control switch is combined with the audio remote switch and the HFL switch. Navigation TALK/BACK commands are sent to the audio-navigation unit via the HandsFreeLink control unit.






Audio-Navigation and HVAC Switch Panel

- The navigation hard buttons and interface dial are used to input commands.
- The display mode button switches the display between Day mode, Night mode, and off.
NOTE: When you activate this button, the navigation auto dimming is turned off until you turn the ignition switch to LOCK (0) or press the engine start/stop button to select OFF mode.
- The audio button displays the audio system information.





Microphone (HFL-Navigation-ANC/Active Sound Control)

Receives voice commands and transmits them to the audio-navigation unit or HandsFreeLink control unit. The microphone unit consist of two microphones. One microphone is combined with the front ANC/active sound control microphone. The microphones detects the driver's voice and passenger's voice separately.






Glossary

The following is a glossary of terms pertaining to the navigation system.

NOTE: All items may not apply to this vehicle. See the Navigation Manual for more information.














Diagnostic System Diagram

This diagram below shows all of the navigation diagnostic features available for system troubleshooting. The diagram starts at the center, and works outward in layers.

Access to the diagnostic features begins by starting the vehicle. This is necessary so the system can check the other systems connected by various busses. After starting the vehicle you can enter the diagnostic mode either by pressing and holding MENU, MAP/GUIDE, and CANCEL, or by connecting the 2-PIN SCS service connector.

The main menu screen allows 2 checking modes - one automatic, and one manual:

- The automatic diagnostic check starts when you select SELF DIAGNOSTIC MODE. The system runs for several seconds, and reports any issues with Red icons. Rotate the interface dial and select the icon you wish obtain the problem details.
- The manual diagnostic check is selected from the main menu by selecting DETAIL INFORMATION AND SETTING. The traditional diagnostic menu is displayed. This allows you to obtain additional details as instructed in the troubleshooting procedures.

NOTE: Do not clear or change settings unless specified by either the service information troubleshooting procedures or by the factory.






Navigation Unit Connector for Inputs and Outputs

NOTE:

- Refer to the audio section for the connectors B, C, E, and F inputs and outputs.
- The connector with the asterisk (*) mark is a lever-lock type.





AUDIO-NAVIGATION UNIT CONNECTOR A (24P)

NOTE: Refer to the audio system section for the terminals inputs and outputs not shown.






Audio-Navigation Unit Connector A (24P)





AUDIO-NAVIGATION UNIT CONNECTOR B (24P)

NOTE: Refer to the audio system section for the terminals inputs and outputs not shown.






Audio-Navigation Unit Connector B (24P)










AUDIO-NAVIGATION UNIT CONNECTOR D (20P)

NOTE: Refer to the audio system section for the terminals inputs and outputs not shown.






Audio-Navigation Unit Connector D (20P)










AUDIO-NAVIGATION UNIT CONNECTOR G (8P)





Audio-Navigation Unit Connector G (8P)










AUDIO-NAVIGATION UNIT CONNECTOR H (28P)





Audio-Navigation Unit Connector H (28P)










Audio-Navigation Unit Connector H (28P)










AUDIO-NAVIGATION UNIT CONNECTOR J (2P)





Audio-Navigation Unit Connector J (2P)





Navigation Display Unit Connector for Inputs and Outputs





NAVIGATION DISPLAY UNIT 28P CONNECTOR






Navigation Display Unit 28P Connector










Navigation Display Unit 28P Connector










Interface Dial Connector for Inputs and Outputs





INTERFACE DIAL 5P CONNECTOR






Interface Dial 5P Connector










Front HFL-Navigation-ANC/Active Sound Control Microphone Connector for Inputs and Outputs





FRONT HFL-NAVIGATION-ANC/ACTIVE SOUND CONTROLMICROPHONE 7P CONNECTOR

NOTE: Refer to the audio system section for the terminals inputs and outputs not shown.






Front HFL-Navigation-ANC/Active Sound Control Microphone 7P Connector





Rearview Camera Connector for Inputs and Outputs





REARVIEW CAMERA 16P CONNECTOR





Rearview Camera 16P Connector