Navigation System (w/o USB Audio System)
NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (w/o USB Audio System): SYSTEM DIAGRAM
NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (w/o USB Audio 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 combines these devices into a signal unit.
2. NAVIGATION SYSTEM OUTLINE
(a) Vehicle position tracking methods
(1) 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.
HINT
*: 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 the GPS radio wave cannot be received. When only autonomous navigation is used, the mapping accuracy may slightly decline.
(b) Autonomous navigation
This method determines the relative vehicle position based on the running track determined by the gyro and vehicle speed sensors.
(1) Gyro sensor
Calculates the direction by detecting angular velocity. It is located in the navigation receiver assembly.
(2) Vehicle speed sensor
Used to calculate the vehicle running distance.
(c) GPS navigation (Satellite navigation)
This method detects the absolute vehicle position using radio waves from a GPS satellite*.
HINT
*: 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 sensor) and GPS navigation. This information is then compared with possible road shapes from the map data on the map disc and the vehicle position is set onto the most appropriate road.
3. TOUCH SCREEN OUTLINE
(a) Touch switches are touch-sensitive (interactive) switches operated by touching the screen. When a switch is pressed, the outer glass bends to contact the inner glass at the pressed position. By doing this, the voltage ratio is measured and the pressed position is detected.
4. DVD (Digital Versatile Disc) PLAYER OUTLINE (for Navigation Map)
(a) The navigation receiver assembly uses a laser pickup to read the digital signals recorded on a DVD.
CAUTION:
Because the navigation system uses an invisible laser beam, do not look directly at the laser pickup. Be sure to only operate the navigation as instructed.
NOTICE:
* Do not disassemble any part of the navigation receiver assembly.
* Do not apply oil to the navigation receiver assembly.
* Do not insert anything but a DVD into the navigation receiver assembly.
5. CD (Compact Disc) PLAYER OUTLINE
(a) A Compact Disc player uses a laser pickup to read digital signals recorded on Compact Dick (CD). By converting the digital signals to analog, it can play music and other content.
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 only play audio CDs, CD-Rs (CD-Recordable), and CD-RWs (CD-ReWritable) that have any of the following marks:
(c) Precautions for use disc
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 hold 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 label or any traces of such labels attached, the discs may not be ejected or player malfunction 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 recorded portion is transparent or translucent because they may be unable to be properly be inserted, ejected or played.
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 a rough road or similar uneven surfaces.
(d) Cleaning
NOTICE:
Do not use 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 a record spray, antistatic agent, alcohol, benzine, and thinner, or a chemical cloth may cause damage to the disc, making the disc unusable.
6. MP3/WMA OUTLINE
(a) Playable MP3 file standards
(b) Playable WMA file standards
(c) ID3 tag and WMA tag
(1) Additional textual information called ID3 tags can be input to MP3 files. Information such as song titles and artist names can be stored.
HINT
This player is compatible with the ID3 tags of ID3 Ver. 1.0 and 1.1, and ID3 Ver. 2.2 and 2.3 (The number of characters complies with ID3 Ver. 1.0 and 1.1.).
(2) Additional textual information called WMA tags 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 the disc, the disc may not play or the CD may skip.
* Some CD-Rs and CD-RWs 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 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 are 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 saving non-MP3 or non-WMA files with an extension of ".mp3" or ".wma", those files are wrongly recognized as MP3 or WMA files and played. A loud noise may occur and damage to the speakers may result.
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 broadcast 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 much more difficult to deflect.
(d) Noise problem
Technicians must have a clear understanding about each customer noise complaint. Use the following table to diagnose noise problems.
HINT
If the noise does not match the examples above, refer to the descriptions about phasing and multipath.
8. DIAGNOSTIC FUNCTION OUTLINE
(a) The navigation system has a diagnostic function (the result is indicated on the master unit).
(b) Each component has a specified number (3 digits) called a physical address. Each function has a number (2 digits) called a logical address.
9. DIAGNOSIS DISPLAY DETAILED DESCRIPTION
HINT
* This section contains a detailed description of displays within diagnostic mode.
* Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be exactly the same as on the actual vehicle.
(a) SYSTEM CHECK
(1) System Check Mode Screen
(2) *1: Device Names and Hardware Addresses
HINT
* Registered device names are displayed.
* If a device name is unknown to the system, its physical address is shown instead.
(3) *2: Check Result
HINT
Result codes for all devices are displayed.
* *3: Code Clear
* Present DTCs are cleared.
* Data is cleared by pressing the "Code CLR" switch for 3 seconds.
* *4: Memory Clear
* Present and past DTCs and registered connected device names are cleared.
* Data is cleared by pressing the "Memory CLR" switch for 3 seconds.
(4) Diagnosis MENU Screen
HINT
Some items may be grayed out or not displayed, as the functions are different depending on the vehicle.
(5) Unit Check Mode Screen
(6) LAN Monitor (Original) Screen
(7) *1: Check Result
HINT
Check results of all the devices are displayed.
(8) LAN Monitor (Individual) Screen
(b) DISPLAY CHECK
(1) Vehicle Signal Check Mode Screen
HINT
* Only items sending vehicle signals will be displayed.
* The input signals from the vehicle are updated once per second and if any have changed, the screen is updated.
(c) NAVIGATION CHECK
(1) Navigation Check Screen
HINT
Some items may be grayed out or not displayed, as the functions are different depending on the vehicle.
(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
* *3: Measurement information
* *4: Position information
* *5: Date information
(3) Vehicle Sensors Screen
HINT
The signals from the vehicle sensors are updated once per second and if any have changed, the screen is updated.
(4) DVD Player Information Screen
HINT
There is a DVD player check function in the navigation ECU.