NAVIGATION SYSTEM (for DVD) SYSTEM DESCRIPTION


  1. NAVIGATION RECEIVER ASSEMBLY OUTLINE


    1. 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.

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  2. NAVIGATION SYSTEM OUTLINE


    1. 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)

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      Operation Description
      Vehicle Position Calculation The navigation receiver assembly calculates the current vehicle position (direction and current position) using the direction deviation signal from the gyro sensor and running distance signal from the vehicle speed sensor and creates the driving route.
      Map Display Processing The navigation receiver assembly processes the vehicle position data, vehicle running track and map data from the map disc.
      Map Matching The map data from the map disc is compared to the vehicle position and running track data. Then, the vehicle position is matched with the nearest road.
      GPS Correction The vehicle position is matched to the position measured by GPS. Then, the GPS measurement position data is compared with the vehicle position and running track data. If the position is very different, the GPS measurement position is used.
      Distance Correction The running distance signal from the vehicle speed sensor includes the error caused by tire wear and slippage between the tires and road surface. Distance correction is performed to account for this. The navigation receiver assembly automatically offsets the running distance signal to make up for the difference between it and the distance data of the map. The offset is automatically updated.
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      Tech Tips

      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 cannot receive a signal. When only autonomous navigation is used, however, the mapping accuracy may slightly decrease.

    2. Autonomous navigation

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


      1. Gyro sensor

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

      2. Vehicle speed sensor signal

        Used to calculate the vehicle running distance.

    3. 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.

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      Number of Satellites Measurement Description
      2 or less Measurement is impossible Vehicle position cannot be obtained because the number of satellites is not enough.
      3 2-dimensional measurement is possible Vehicle position is obtained based on the current longitude and latitude. (This is less precise than 3-dimensional measurement.)
      4 3-dimensional measurement is possible Vehicle position is obtained based on the current longitude, latitude and altitude.

    4. 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 in the map disc and the vehicle position is set onto the most appropriate road.

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    5. 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.

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


    1. 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.

      Note


      • 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. DVD (DIGITAL VERSATILE DISC) PLAYER OUTLINE (w/ DVD Player)


    1. The DVD player can only play DVD videos and video CDs that have any of the following marks:

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      1. Precaution for use of discs

        Note


        • Keep the discs away from dirt. Be careful not to damage the discs or leave 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.

        • 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.

        • DualDiscs that mate DVD recorded material on one side with CD digital audio material on the other cannot be played.

  5. CD (COMPACT DISC) PLAYER OUTLINE


    1. 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.

      Note


      • 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.

    2. 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:

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    3. Precautions for use of discs

      Note


      • 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.

      • DualDiscs 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.

      Tech Tips


      • 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 surface(s).

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      Cleaning

      Note

      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.

        Note


        • Pressing on the disc by hand or rubbing the disc with a hard cloth may scratch the disc surface.

        • Use of solvent 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


    1. Playable MP3 file standards

      Compatible standard MP3 (MPEG1 LAYER3, MPEG2 LSF LAYER3)
      Compatible sampling frequency

      • MPEG1 LAYER3: 32, 44.1, 48 (kHz)

      • MPEG2 LSF LAYER3: 16, 22.05, 24 (kHz)
      Compatible bit rate

      • MPEG1 LAYER3: 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 (kbps)

      • MPEG2 LSF LAYER3: 64, 80, 96, 112, 128, 144, 160 (kbps)

      • Compatible with VBR
      Compatible channel mode Stereo, joint stereo, dual channel, monaural

    2. Playable WMA file standards

      Compatible standard WMA Ver. 7, 8, and 9
      Compatible sampling frequency 32, 44.1, 48 (kHz)
      Compatible bit rate (Only compatible with 2-channel playback)

      • Ver. 7, 8: CBR48, 64, 80, 96, 128, 160, 192 (kbps)

      • Ver. 9: CBR48, 64, 80, 96, 128, 160, 192, 256, 320 (kbps)

    3. ID3 tag and WMA tag


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

        Tech Tips

        This player is compatible with the 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 textual information called WMA tag can be input to WMA files. Information such as song titles and artist names can be stored.

    4. Usable media


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

        Note


        • 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.

    5. Usable media format


      1. Usable media format

        Disc format CD-ROM Mode 1, CD-ROM XA Mode 2 Form 1
        File format ISO9660 Level 1 and Level 2 (Joliet, Romeo)

        Tech Tips


        • 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 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. Standard and restrictions

        Maximum directory levels 8 levels
        Maximum number of characters for a folder name/file name 32 characters
        Maximum number of folders 192 (Including empty folders, route folders, and folders that do not contain MP3/WMA files)
        Maximum number of files in a disc 255 (Including non-MP3/WMA files)

    6. 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".

        Note

        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 speaker may result.

  7. "Bluetooth" OUTLINE

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    1. "Bluetooth" is a trademark owned by Bluetooth SIG. Inc.

    2. "Bluetooth" is a new wireless connection technology that uses the 2.4 GHz frequency band.

      Tech Tips

      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.

    3. 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 the phone may be 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.

  8. RADIO DESCRIPTION


    1. Radio frequency band


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

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    2. A01JATFE01

      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.

    3. Radio reception problems

      Tech Tips

      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.


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        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.

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        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.

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        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.

    4. Noise problem

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

      Radio Frequency Noise Occurrence Condition Presumable Cause
      AM Noise occurs in a specified area Foreign noise
      AM Noise occurs when listening to an intermittent broadcast An identical program transmitted from multiple towers can cause noise where the signals overlap
      AM Noise occurs only at night Signal phasing
      FM Noise occurs while driving in a specified area Multipath noise resulting from a change in FM frequency

  9. AUTOMATIC SOUND LEVELIZER (ASL) FUNCTION OUTLINE


    1. The Automatic Sound Levelizer (ASL) function automatically adjusts the sound volume in order to enable clear audio quality even when vehicle noise increases (as vehicle noise increases, the volume is turned up, etc.).

      Vehicle speed signals are received from the combination meter assembly and used for the ASL control.

  10. COMMUNICATION SYSTEM


    1. AVC-LAN Outline

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      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.

        Tech Tips


        • The navigation receiver assembly has enough resistance (60 to 80 Ω) necessary for communication.

        • If a short or open circuit occurs in the AVC-LAN circuit, communication is interrupted and system will not operate normally.

  11. DIAGNOSTIC FUNCTION OUTLINE


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

  12. DIAGNOSIS DISPLAY DETAILED DESCRIPTION

    Tech Tips


    • 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.


    1. Service Menu Screen

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      Tech Tips

      Each item is grayed out or not displayed based on the device settings.

    2. Failure Diagnosis Screen

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      Tech Tips

      Each item is grayed out or not displayed based on the device settings.


      1. System Check Mode Screen

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        • *1: Device Name List No. 1

          Tech Tips


          • 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.

            Name Component Connection Method
            AVN Navigation receiver assembly -
            CAMERA-C Parking assist ECU Communication line for AVC-LAN

        • *2: Check Result

          Tech Tips

          Result codes for all devices are displayed.

          Result Meaning Action
          OK The device does not respond with a DTC. -
          EXCH The device responds with a "replace"-type DTC. Look up the DTC in "Unit Check Mode" and replace the device.
          CHEK The device responds with a "check"-type DTC. Look up the DTC in "Unit Check Mode".
          NCON The device was previously present, but does not respond in diagnostic mode.

          - Check power supply wire harness of the device.

          - Check the AVC-LAN of the device.
          NRES The device responds in diagnostic mode, but gives no DTC information.

          - Check power supply wire harness of the device.

          - Check the AVC-LAN of the device.

        • *3: Memory Clear

          Tech Tips


          • Present and history DTCs and registered connected device names are cleared.

          • Press the "Memory CLR" switch for 3 seconds.


        • *4: Recheck

          Tech Tips


          • 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

          Tech Tips


          • 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.

            Name Component Connection Method
            MIC Telephone microphone assembly Vehicle wire harness
            AUX No. 1 stereo jack adapter assembly Vehicle wire harness

      2. Unit Check Mode Screen

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        Screen Description
        Display Content
        *1: Device name Target device
        *2: History DTC Diagnostic memory results and stored DTCs are displayed.
        *3: Present DTC DTCs output in the service check are displayed.
        *4: DTC DTC (Diagnostic Trouble Code)
        *5: Timestamp The time and date of history DTCs are displayed. (The year is displayed in 2-digit format.)
        *6: Diagnosis clear switch Pushing this switch for 3 seconds clears the diagnostic memory data of the target device. (Both response to diagnostic system check result and the displayed data are cleared.)

    3. Function Check/Setting Screen

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      Tech Tips

      Each item is grayed out or not displayed based on the device settings.


      1. Microphone & Voice Recognition Check Screen

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        Screen Description
        Display Content
        *1: Microphone input level meter Monitors the microphone input level every 0.1 sec. and displays the results in 8 different levels.
        *2: Recording switch Starts recording.
        *3: Stop switch Stops recording and playing.
        *4: Play switch Plays the recorded voice.
        *5: Recording indicator Comes on while recording.

        Tech Tips


        • The microphone is active at all times when this screen is displayed.

        • 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

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        • *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
          Display Content
          T The system is receiving a GPS signal, but is not using it for location.
          P The system is using the GPS signal for location.
          - The system cannot receive a GPS signal.

        • *3: Measurement information

          Screen Description
          Display Content
          2D 2-dimensional location method is being used.
          3D 3-dimensional location method is being used.
          NG Location data cannot be used.
          Error Reception error has occurred.
          - Any other state.

        • *4: Position information

          Screen Description
          Display Content
          Position Latitude and longitude information on the current position is displayed.

        • *5: Date information

          Screen Description
          Display Content
          Date The date/time information obtained from GPS signal is displayed in Greenwich Mean Time (GMT).

      3. Vehicle Sensors Screen

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        Vehicle Signal
        Display Content
        *1: SPD SPD signal condition is displayed.
        Sensor Signal
        Display Content
        *2: Gyro sensor Gyro sensor output condition is displayed.

        Tech Tips

        Signals are updated once per second only when vehicle sensor signals are changed.

      4. Vehicle Signal Check Mode Screen

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        Screen Description
        Display Content
        Battery Battery voltage is displayed.
        IG Power switch ON/OFF state is displayed.
        PKB Parking brake ON/OFF state is displayed.
        REV Reverse signal ON/OFF state is displayed.
        SPEED Vehicle speed is displayed in km/h.
        TAIL Tail signal (Light control switch) ON/OFF state is displayed.

        Tech Tips


        • Only items sending vehicle signals will be displayed.

        • This screen is updated once per second when input signals to the vehicle are changed.