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Home >> Lexus >> 2012 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Audio Entertainment System (W/O Navigation) (Multi-Display) (Diagnostics - Introduction) >> AUDIO AND VISUAL SYSTEM (w/o Navigation System with Multi-display) >> System Description >> System Description

System Description

  1. TOUCH SWITCH OUTLINE 
    1. 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.

      Fig 1: Touch-Sensitive (Interactive) Switches
      GTY256523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. DVD (Digital Versatile Disc) PLAYER OUTLINE (for Voice Recognition Function) 
    1. The navigation module board uses a laser pickup to read the digital signals recorded on a DVD.
      WARNING:

      Because the audio and visual system uses an invisible laser beam, do not look directly at the laser pickup. Be sure to only operate the audio and visual system as instructed.

      NOTE:
      • Do not disassemble any part of the navigation module board.
      • Do not apply oil to the navigation module board.
      • Do not insert anything but a DVD into the navigation module board.
  3. DVD (Digital Versatile Disc) PLAYER OUTLINE (for DVD Changer Models) 
    1. The DVD player can only play DVD videos, DVD audio and video CDs that have any of the following marks:
      Fig 2: View Of Disc Identification Marks - Usable Discs
      GTY221121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Precaution for use of discs
        NOTE:
        • PAL or SECAM color television standard discs cannot be played (only NTSC discs can be played).
        • 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.
  4. 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.
      WARNING:

      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:
        Fig 3: View Of Disc Marks
        GTY206439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
      • Use only 4.7 in. (12 cm) CDs.
      • Do not use 3 in. (8 cm) CDs, either with or without adopters.

      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 sound may skip or stop in the middle of play. Ventilate or dehumidify the cabin for a while before using the player.
      • The CD sound may skip if the player experiences strong vibrations when the vehicle is driven on rough roads or similar uneven surface(s).
    4. Cleaning
      NOTE:

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

      Fig 4: View Of Disc Surface Cleaning Procedure
      GTY100352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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.
  5. 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: 32, 48, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 (kbps)
      • MPEG2 LSF LAYER3: 8, 16, 32, 48, 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.

        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. (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 will not play.
        • If there are fingerprints or scratches on a disc, the disc may not play or the CD sound 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 Form1
        File format ISO9660 Level 1 and Level 2 (Joliet, Romeo)

        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 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 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 speakers may result.

  6. USB AUDIO SYSTEM FUNCTION OUTLINE 
    1. 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.
    2. USB audio system compatible model
      1. USB Device

        The following device formats can be used:

        Compatible USB device formats
        • USB communication format: USB 2.0 FS (12MBPS)
        • File format: FAT16/32 (Windows)
        • Class: Mass storage class

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

        Supported "iPod" Model Supported Firmware Version
        "iPod" 5G Ver. 1.2 or higher
        "iPod Nano" 1G Ver. 1.3 or higher
        "iPod Nano" 2G Ver. 1.1.2 or higher
        "iPod Nano" 3G Ver. 1.0 or higher
        "iPod touch" Ver. 1.1 or higher
        "iPod classic" Ver. 1.0 or higher
        UNSUPPORTED "IPOD" MODELS

        Unsupported Models "iPod shuffle"
        "iPhone"
        "iPod" 1G, 2G, 3G, 4G
        "iPod mini"

        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.
  7. "Bluetooth" OUTLINE 
    1. "Bluetooth" is a trademark owned by Bluetooth SIG, Inc.
    2. "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.

    3. Hands-free function
      1. The "Bluetooth" built-in radio receiver 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.

        Fig 5: Radio Receiver Assembly
        GTY395403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        TEXT IN ILLUSTRATION

        *a Radio Receiver Assembly
        (Built-in "Bluetooth" receiver antenna)
        *b Cellular Phone
        ("Bluetooth" compatible type)
        *c Cellular Tower - -
  8. COMMUNICATION SYSTEM 
    1. MOST Network Outline
      Fig 6: Communication System (MOST Network Outline)
      GTY393732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Audio and visual system components communicate with each other via the MOST network.
      2. The MOST network uses a shielded twisted pair of wires for its communication lines.
      3. The master unit of the MOST network is the display and navigation module display.
      4. MOST communication lines connect each slave unit centering around the master unit to form a MOST network ring.
      5. The master unit sends a wake-up signal to activate each slave unit connected to the MOST network.

        HINT: 

        If a short or open circuit occurs in the MOST circuit, communication will be interrupted and the system will not operate normally.

    2. AVC-LAN Outline
      Fig 7: Communication System (AVC-LAN Outline)
      GTY395272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Components of the audio and visual 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 display and navigation module display.

        HINT: 

        • The display and navigation module display 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 the system will not operate normally.
  9. Automatic Sound Levelizer (ASL) FUNCTION OUTLINE 
    1. 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.
  10. DIAGNOSTIC FUNCTION OUTLINE 
    1. The audio and visual system has a diagnostic function (the result will be displayed on the master unit or the Techstream).
  11. DIAGNOSIS DISPLAY DETAILED DESCRIPTION 

    HINT: 

    • This information 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
      Fig 8: Identifying Service Menu Screen
      GTY283014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

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

    2. Failure Diagnosis Screen
      Fig 9: Failure Diagnosis Screen
      GTY393969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

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

      SCREEN DESCRIPTION

      Display Content
      *a: Navi Ver. Navigation application version
      *b: Disc Ver. Data disc version
      1. System Check Mode Screen
        Fig 10: System Check Mode Screen
        GTY394344Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • *a: Node position number for devices connected to the MOST network.

          HINT: 

          MOST node position numbers are provided for devices connected to the MOST network.

        • *b: Device Name List No. 1

          HINT: 

          • Device Name List No. 1 displays some of the devices that make up the audio and visual system.
          • The names of the components from Device Name List No. 1 are shown in the following table.
            Name Component Connection Method
            EMVN Display and navigation module display -
            AUDIO Radio receiver assembly Communication line for MOST network
            AMP Stereo component amplifier assembly Communication line for MOST network
            G/W Network gateway ECU Communication line for AVC-LAN
            USB BOX Multi-media interface ECU Communication line for AVC-LAN
        • *c: Check Result

          HINT: 

          • Result codes for all devices are displayed.
          • When "MOST" is displayed for the result, press "MOST" on the multi-display to display the "MOST Line Check" screen.
          Result Meaning Action
          OK The device does not respond with a DTC. -
          MOST MOST communication error Perform "MOST Line Check" to check the connection of each device on the MOST network.
          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 the power supply wire harness of the device.
          - Check the AVC-LAN or MOST network for the device.
          NRES The device responds in diagnostic mode, but gives no DTC information. - Check the power supply wire harness of the device.
          - Check the AVC-LAN or MOST network for the device.
        • *d: Memory Clear

          HINT: 

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

          HINT: 

          • A system check will be performed again after the memory is cleared.
          • The "Recheck" switch will dim during a system check.
        • *f: Device Name List No. 2

          HINT: 

          • Device Name List No. 2 displays some of the devices that make up the audio and visual 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
        Fig 11: Unit Check Mode Screen
        GTY395339Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        SCREEN DESCRIPTION

        Display Content
        *a: Device name Target device
        *b: History DTC Diagnostic memory results and stored DTCs are displayed.
        *c: Current DTC DTCs output in the service check are displayed.
        *d: DTC DTC (Diagnostic Trouble Code)
        *e: Timestamp The time and date of history DTCs are displayed. (The year is displayed in 2-digit format.)
        *f: 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. MOST Line Check Screen

        HINT: 

        • The inspection will be performed at the time the screen changes from "System Check Mode" to "MOST Line Check".
        • The master unit checks the connection of each device on the MOST network.
        Fig 12: MOST Line Check Screen
        GTY394623Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • *a: Node position number for devices connected to the MOST network.
        • *b: Device Name List

          HINT: 

          • Device Name List displays some of the devices that make up the audio and visual system.
          • The names of the components from Device Name List are shown in the following table.
            Name Component
            EMVN Display and navigation module display
            AUDIO Radio receiver assembly
            AMP Stereo component amplifier assembly
        • *c: Check Result

          HINT: 

          • The master unit displays the check result on the screen based on the response information from each slave unit.
          • Result codes for all devices are displayed.
            Result Meaning
            OK There was a response for the connection check during the MOST line check.
            NCON There was no response for the connection check during the MOST line check.
          • The device name and result will not be displayed if there is no system registration record and no response for the connection check during the MOST line check even if the device is connected to the MOST network.
    3. Function Check/Setting Screen
      Fig 13: Identifying Function Check/Setting Screen
      GTY289770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

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

      1. Microphone & Voice Recognition Check Screen
        Fig 14: Microphone & Voice Recognition Check Screen
        GTY393462Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        SCREEN DESCRIPTION

        Display Content
        *a: Microphone input level meter Monitors the microphone input level every 0.1 sec. and displays the results in 8 different levels.
        *b: Recording switch Starts recording.
        *c: Stop switch Stops recording and playing.
        *d: Play switch Plays the recorded voice.
        *e: Recording indicator Comes on while recording.

        HINT: 

        • 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.
        • 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.
      2. GPS Information Screen
        Fig 15: GPS Information Screen
        GTY395229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        • *a: Satellite information

          HINT: 

          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.

        • *b: 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.
        • *c: 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.
        • *d: Date information
          SCREEN DESCRIPTION

          Display Content
          Date The date/time information obtained from GPS signal is displayed in Greenwich Mean Time (GMT). The last 4 digits are displayed.
      3. Vehicle Sensors Screen
        Fig 16: Vehicle Sensors Screen
        GTY394971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        VEHICLE SIGNAL

        Display Content
        *a: SPD SPD signal condition is displayed.
        SENSOR SIGNAL

        Display Content
        *b: Gyro sensor Gyro sensor output condition is displayed.

        HINT: 

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

      4. Vehicle Signal Check Mode Screen
        Fig 17: Screen Display - Vehicle Signal Check Mode
        GTY282864Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        SCREEN DESCRIPTION

        Display Content
        Battery Battery voltage is displayed.
        IG Engine 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.

        HINT: 

        • Only items sending vehicle signals will be displayed.
        • This screen is updated once per second when input signals to the vehicle are changed.