Navigation System: Description and Operation

NAVIGATION: NAVIGATION SYSTEM: SYSTEM DIAGRAM

NAVIGATION: NAVIGATION SYSTEM: SYSTEM DESCRIPTION

1. NAVIGATION RECEIVER ASSEMBLY OUTLINE

(a) Conventionally, 2 separate devices, a "radio and display" and a "navigation ECU" are used. This model has adopted a type that combines these devices into a single unit.

2. NAVIGATION SYSTEM OUTLINE

(a) Vehicle position tracking methods

It is essential that the navigation system correctly tracks the current vehicle position and displays it on the map. There are 2 methods to track the current vehicle position: autonomous (dead reckoning) and GPS* (satellite) navigation. Both navigation methods are used in conjunction with each other.

*GPS (Global Positioning System)

HINT
The combination of autonomous and GPS navigation makes it possible to display the vehicle position even when the vehicle is in places where GPS signals cannot be received. When only autonomous navigation is used, however, the mapping accuracy may slightly decrease.

(b) Autonomous navigation

This method determines the relative vehicle position based on the driving track determined by the gyro located in the navigation receiver assembly and the vehicle speed signal.

(1) Gyro sensor

Used to calculate the direction by detecting angular velocity. It is located in the navigation receiver assembly.

(2) Vehicle speed signal

Used to calculate the vehicle driving distance.

(c) GPS* navigation (Satellite navigation)

This method detects the absolute vehicle position using radio waves from GPS satellites.

*: GPS satellites were launched by the U.S. Department of Defense for military purposes.

(d) Map matching

The current driving route is calculated by autonomous navigation (according to the gyro sensor and vehicle speed signal) and GPS navigation. This information is then compared with possible road shapes from the map data in the map disc and the vehicle position is set onto the most appropriate road.

(e) Touch switch

Touch switches are touch-sensitive (interactive) switches operated by touching the screen. When a switch is pressed, the outer glass bends in to contact the inner glass at the pressed position. By doing this, the voltage ratio is measured and the pressed position is detected.

3. DVD (DIGITAL VERSATILE DISC) PLAYER OUTLINE (for navigation map)

(a) The navigation receiver assembly (built-in navigation ECU) uses a laser pickup to read the digital signals recorded on a DVD.

CAUTION:
Do not look directly at the laser pickup because the navigation receiver assembly (built-in navigation ECU) uses an invisible laser beam.

Be sure to operate the navigation system only as instructed.

NOTICE:
* Do not disassemble any part of the navigation receiver assembly (built-in navigation ECU).
* Do not apply oil to the navigation receiver assembly (built-in navigation ECU).
* Do not insert anything but a DVD into the navigation receiver assembly (built-in navigation ECU).

4. CD (COMPACT DISC) PLAYER OUTLINE

(a) A compact disc player uses a laser pickup to read digital signals recorded on a compact disc (CD). By converting the digital signals to analog, it can play music and audio.

CAUTION:
Do not look directly at the laser pickup because the CD player uses an invisible laser beam. Be sure to operate the player only as instructed.

NOTICE:
* Do not disassemble any part of the CD player.
* Do not apply oil to the CD player.
* Do not insert anything but a CD into the CD player.

(b) Usable discs

(1) This player can play only audio CDs, CD-Rs (CD-Recordable) and CD-RWs (CD-ReWritable) that have any of the following marks:

(c) Precautions for use of discs

NOTICE:
* Copy-protected CDs cannot be played.
* CD-Rs and CD-RWs may not be played depending on the recording conditions or characteristics of the discs, or due to damage, dirt or deterioration caused by leaving the discs in the cabin for a long time.
* Unfinalized CD-Rs and CD-RWs cannot be played.
* Dual Discs that mate DVD recorded material on one side with CD digital audio material on the other cannot be played.
* Keep the discs away from dirt. Be careful not to damage the discs or leave your fingerprints on them.
* Hold discs by the outer edge and center hole with the label side up.
* Leaving the disc exposed halfway out of the slot for a long time after pressing the disc eject button may cause deformation of the disc, making the disc unusable.
* If discs have adhesive tape, stickers, CD labels or any traces of such labels attached, the discs may not be ejected or player malfunctions may result.
* Keep the discs away from direct sunlight. (Exposure to direct sunlight may cause deformation of the disc, making the disc unusable.)
* Do not use odd-shaped CDs because these may cause player malfunctions.
* Do not use discs whose recording portion is transparent or translucent because they may not be inserted, ejected or played normally.

HINT
* When it is cold or it is raining, if the windows mist up, mist and condensation may form in the player. In such cases, the CD may skip or stop in the middle of play. Ventilate or dehumidify the cabin for a while before using the player.
* The CD may skip if the player experiences strong vibrations when the vehicle is driven on rough roads or similar uneven surfaces.

(d) Cleaning

NOTICE:
Do not use a lens cleaner because it may cause a malfunction in the pickup portion of the player.

(1) If dirt is on the disc surface, wipe it clean with a soft dry cloth such as an eyeglass cleaner for plastic lenses from the inside to the outside in a radial direction.

NOTICE:
* Pressing on the disc by hand or rubbing the disc with a hard cloth may scratch the disc surface.
* Use of solvents such as record spray, antistatic agents, alcohol, benzine and thinners or a chemical cloth may cause damage to the disc, making the disc unusable.

5. MP3/WMA OUTLINE

(a) Playable MP3 file standards

(b) Playable WMA file standards

(c) ID3 tag and WMA tag

(1) Additional text information called an ID3 tag can be input to MP3 files. Information such as song titles and artist names can be stored.

HINT
This player is compatible with ID3 tags of ID3 Ver. 1.0 and 1.1, and ID3 Ver. 2.2 and 2.3. (Number of characters complies with ID3 Ver. 1.0 and 1.1.)

(2) Additional text information called a WMA tag can be input to WMA files. Information such as song titles and artist names can be stored.

(d) Usable media

(1) Only CD-ROMs, CD-Rs (CD-Recordable) and CD-RWs (CD-ReWritable) can be used to play MP3/WMA files.

NOTICE:
* CD-Rs and CD-RWs are more easily affected by a hot and humid environment than discs used for normal audio CDs. For this reason, some CD-Rs and CD-RWs do not play.
* If there are fingerprints or scratches on a disc, the disc may not play or the CD may skip.
* Some CD-Rs and CD-RWs may deteriorate if they are left in the cabin for a long time.
* Keep CD-Rs and CD-RWs in an opaque case.

(e) Usable media format

(1) Usable media format

HINT
* As for MP3/WMA files written in any unlisted format, the contents of the files may not be played normally or the file names or folder names may not be displayed correctly.
* This player is compatible with multi-session discs and can play CD-Rs and CD-RWs on which MP3/WMA files have been added. However, only the first session can be played.
* Discs whose first session includes both music data and MP3 or WMA format data cannot be played.

(2) Standards and restrictions

(f) File names

(1) Only files with an extension of ".mp3" or ".wma" can be recognized and played as MP3 or WMA files.

(2) Save MP3 or WMA files with an extension of ".mp3" or ".wma".

NOTICE:
If non-MP3 or non-WMA files are saved with an extension of ".mp3" or ".wma", those files may be wrongly recognized as MP3 or WMA files and played. A loud noise may occur and damage to the speaker may result.

6. "Bluetooth" OUTLINE

(a) "Bluetooth" is a trademark owned by Bluetooth SIG. Inc.

(b) "Bluetooth" is a wireless connection technology that uses the 2.4 GHz frequency band.

HINT
The communication performance of "Bluetooth" may vary depending on obstructions or radio wave conditions between communication devices, electromagnetic radiation, communication device sensitivity or antenna capacity.

(c) Hands-free function

(1) The "Bluetooth" built-in navigation receiver assembly and a "Bluetooth" compatible cellular phone*1 can be connected using a "Bluetooth" wireless connection. This enables use of the hands-free function on the cellular phone even if the phone is in a pocket or bag. For this reason, it is not necessary to use a connector or cable to connect the cellular phone.

*1: Some versions of "Bluetooth" compatible cellular phones may not function.

(d) "Bluetooth" audio function

(1) The "Bluetooth" built-in navigation receiver assembly and a "Bluetooth" compatible portable audio player*2 can be connected using a "Bluetooth" wireless connection. This enables files stored in the portable audio player to be heard from the vehicle speakers. In addition, operations such as play/stop can be performed directly from the navigation receiver assembly.

*2: Some versions of "Bluetooth" compatible audio players may not be able to operate the "Bluetooth" function, or music may play, but functions available using the navigation receiver assembly may be limited.

(2) Compatible "Bluetooth" audio devices

HINT
The amount of remaining battery charge displayed on the navigation receiver assembly may be different from that of the portable player.

7. RADIO DESCRIPTION

(a) Radio frequency band

(1) Radio broadcasts use the radio frequency bands shown in the table below.

(b) Service area

(1) The service areas of AM and FM broadcasts are vastly different. Sometimes an AM broadcast can be received very clearly but an FM stereo cannot. FM stereo has the smallest service area, and is prone to pick up static and other types of interference such as noise.

(c) Radio reception problems

HINT
In addition to static, other problems such as "phasing", "multipath" and "fade out" exist. These problems are not caused by electrical noise, but by the radio signal propagation method itself.

(1) Phasing

AM broadcasts are susceptible to electrical interference and another kind of interference called phasing. Occurring only at night, phasing is the interference created when a vehicle receives 2 radio wave signals from the same transmitter. One signal is reflected off the ionosphere and the other signal is received directly from the transmitter.

(2) Multipath

Multipath is a type of interference created when a vehicle receives 2 radio wave signals from the same transmitter. One signal is reflected off buildings or mountains and the other signal is received directly from the transmitter.

(3) Fade out

Fade out is caused by objects (buildings, mountains and other such large obstacles) that deflect away part of a signal, resulting in a weaker signal when the object is between the transmitter and vehicle. High frequency radio waves, such as FM broadcasts, are easily deflected by obstructions. Low frequency radio waves, such as AM broadcasts, are less likely to deflect.

(d) Noise problem

Technicians must have a clear understanding about each customer's noise complaint. Use the following table to diagnose noise problems.

8. RBDS FUNCTION OUTLINE (BROADCAST IN NORTH AMERICA ONLY)

The Radio Broadcast Data System (RBDS) is broadcast through conventional FM radio broadcasts. Information such as song names, traffic information, broadcast station names, etc. can be received.

9. SDARS SYSTEM FUNCTION OUTLINE (BROADCAST IN NORTH AMERICA ONLY)

Satellite Digital Audio Radio Service (SDARS) is a satellite digital radio broadcast provided by Sirius XM Radio Inc. The broadcast (pay-type) is performed through satellites and terrestrial repeater networks. Several unique channels are available, and even if a vehicle changes locations, the same information can be received without breaks. Information such as song names, broadcast station names, etc. can be received. Also, traffic information can be received and displayed on the navigation screen.

NOTICE:
To receive audio-visual pay-type broadcasts, the customer must enter into a pay-type contract with XM Satellite Radio Inc. After entering into a contract, registration of the XM Radio ID is required. Also, if parts are replaced, the XM Radio ID must be re-registered.

10. USB AUDIO SYSTEM FUNCTION OUTLINE

(a) The No. 1 stereo jack adapter assembly is equipped with a USB terminal. Connecting a USB device or "iPod" to the No. 1 stereo jack adapter assembly allows music files to be played. Not only is it possible to play music from a USB device with audio functions, is also possible to play MP3 or WMA music files that are stored on a USB device. In addition, "iPod" control software is installed, allowing file selection from playlists and operation using shuffle mode.

HINT
* Visual contents of an "iPod" cannot be played.
* Operation through the controls of a USB device or "iPod" cannot be performed while it is connected.

(b) USB audio system compatible model

(1) USB Device

The following device formats can be used:

MP3 and WMA files written in any format other than those listed above may not play correctly, and their file and folder names may not be displayed correctly.

Items related to standards and limitations are as follows:

Maximum directory hierarchy: 8 levels

Maximum number of folders in device: 999 (including the root folder)

Maximum number of files in device: 65025

Maximum number of files per folder: 255

(2) "iPod"

"iPod" is a trademark of Apple Inc., registered in the U.S. and other countries.

Supported "iPod" Models and Firmware Versions

Unsupported "iPod" Models

Items related to standards and limitations are as follows:

Maximum number of lists in device: 9999

Maximum number of songs in device: 65535

Maximum number of songs per list: 65535

HINT
* "iPod" models and firmware versions that are not listed in "Supported "iPod" Models and Firmware Versions" may not function, or may not function correctly.
* Depending on the generation of "iPod" used, response to commands from the vehicle may be delayed.

11. AUTOMATIC SOUND LEVELIZER (ASL) FUNCTION OUTLINE

(a) The Automatic Sound Levelizer (ASL) function automatically adjusts the audio system volume level in order to compensate for increased vehicle noise (vehicle noise tends to increase as vehicle speed increases). The ASL adjusts the volume level based upon vehicle speed signals that it receives from the combination meter assembly.

12. COMMUNICATION SYSTEM

(a) AVC-LAN Outline

(1) Components of the navigation system communicate with each other via the AVC-LAN.

(2) The AVC-LAN uses a twisted pair of wires for its communication lines.

(3) The master unit of the AVC-LAN is the navigation receiver assembly.

HINT
* The navigation receiver assembly has the resistance (60 to 80 Ohms) necessary for communication.
* If a short or open circuit occurs in the AVC-LAN circuit, communication will be interrupted and the system will not operate normally.

(b) AVC-LAN plus Outline

(1) Navigation system components communicate with each other via the AVC-LAN plus.

(2) The AVC-LAN plus uses two twisted pairs of cables for its communication lines.

(3) The master unit of the AVC-LAN plus is the navigation receiver assembly.

HINT
* The navigation receiver assembly has the resistance (95 to 105 Ohms) necessary for communication.
* If a short or open circuit occurs in the AVC-LAN plus circuit, communication will be interrupted and the system will not operate normally.

13. DIAGNOSTIC FUNCTION OUTLINE

(a) The navigation system has a diagnostic function (the result is indicated on the master unit).

14. DIAGNOSIS DISPLAY DETAILED DESCRIPTION

HINT
* This section contains a detailed description of displays in diagnostic mode.
* Illustrations may differ from the actual vehicle screen depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle screen.

(a) Service Menu Screen

HINT
Some items are grayed out or not displayed based on the device settings.

(b) Failure Diagnosis Screen

HINT
Some items are grayed out or not displayed based on the device settings.

(1) System Check Mode Screen

*1: Device Name List No. 1

HINT
* Device Name List No. 1 displays some of the devices that make up the navigation system.
* The names of the components from Device Name List No. 1 are shown in the following table.

*2: Check Result

HINT
Result codes for all devices are displayed.

*3: Memory Clear

HINT
* Present and history DTCs and registered connected device names are cleared.
* Press the "Memory CLR" switch for 3 seconds.

*4: Recheck

HINT
* A system check will be performed again after the memory is cleared.
* The "Recheck" switch will dim during a system check.

*5: Device Name List No. 2

HINT
* Device Name List No. 2 displays some of the devices that make up the navigation system.
* The names of the components from Device Name List No. 2 are shown in the following table.

(2) Unit Check Mode Screen

Screen Description

HINT
A maximum of 6 DTCs can be displayed for history and present DTCs.

(c) Function Check/Setting Screen

HINT
Some items are grayed out or not displayed based on the device settings.

(1) Microphone & Voice Recognition Check Screen

Screen Description

HINT
* The microphone is active at all times when this screen is displayed.
* Select the recording switch with the blower motor of the air conditioning system stopped. If an outlet of the air conditioning system is facing the microphone, noise may be recorded.
* While recording or playing, the switches other than the stop switch cannot be pushed.
* When no recording is present, the play switch cannot be pushed.
* Recording will stop after 5 seconds or when the stop switch is pushed.

(2) GPS Information Screen

*1: Satellite information

Information from a maximum of 12 satellites is displayed on the screen. This information includes the target GPS satellite number, elevation angle, direction and signal level.

*2: Receiving condition

Screen Description