Lexus NX: System Description

SYSTEM DESCRIPTION

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 ECU and the vehicle speed signal.

(1) Gyro sensor

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

(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 internal memory and the vehicle position is set onto the most appropriate road.

DISC PLAYER OUTLINE

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

CAUTION:

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

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

(c) This player can play only DVD videos that have any of the following marks:

(d) This player can play only DVD-Rs (DVD-Recordable) and DVD-RWs (DVD-ReWritable) that were recorded in video format and that have any of the following marks:

(e) The following products may not be playable on your player.

(f) Precautions for use of discs

(g) 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.

USB FUNCTION OUTLINE

(a) The No. 1 stereo jack adapter assembly is equipped with a USB terminal. Connecting a USB memory device or "iPod" to the No. 1 stereo jack adapter assembly allows compatible files to be played Not only is it possible to play music from a USB memory device with audio functions, it is also possible to play compatible music files that are stored on a USB memory device. Also, the "iPod" control software is installed on the radio receiver assembly, allowing song selection from the list, switching of the shuffle mode, etc., from the multi-display assembly screen.

HINT:

Operation through the controls of a USB device or some "iPod" cannot be performed while it is connected.

(b) USB system compatible devices

(1) USB device

The following device formats can be used:

MP3, WMA and AAC files written to a USB device with 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:

(2) "iPod"

"iPhone", "iPod nano" and "iPod touch" are trademarks of Apple Inc., registered in the U.S. and other countries.

The following "iPhone", "iPod", "iPod nano", and "iPod touch" devices can be used with this system.

Made for:

HIGH-RESOLUTION SOUND SOURCE OUTLINE

(a) This device supports high-resolution sound sources.

(b) The definition of high-resolution is based on the standards of groups such as the CTA (Consumer Technology Association).

(c) The following formats and media can be used:

(d) File names

(1) Only files with an extension of ".wav", ".flac", ".alac" and ".ogg" can be recognized and played as WAV, FLAC, ALAC or OGG Vorbis files.

(2) Save WAV, FLAC, ALAC or OGG Vorbis files with an extension of ".wav", ".flac", ".alac" and ".ogg".

NOTICE:

If non-WAV, non-FLAC, non-ALAC or non-OGG Vorbis files are saved with an extension of ".wav", ".flac", ".alac" or ".ogg", those files may be wrongly recognized as WAV, FLAC, ALAC or OGG Vorbis files and played. A loud noise may occur and damage to the speakers may result.

FILE INFORMATION OUTLINE

(a) Compatible compressed files

(b) Corresponding sampling frequency

(c) Corresponding bit rates*1

(d) Compatible channel modes

(e) ID3 tag, WMA tag, AAC tag, TAG and Vorbis comment

(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.

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

(4) Additional text information called a tag can be input to WAV (LPCM), FLAC or ALAC files. Information such as song titles and artist names can be stored.

(5) Additional text information called a Vorbis comment can be input to OGG Vorbis files. Information such as song titles and artist names can be stored.

(f) Usable media

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

(g) Usable media format

(1) Usable media format

(2) Standards and restrictions

(h) File names

(1) Only files with an extension of ".mp3", ".wma", ".m4a", ".wav", ".flac", ".alac" and ".ogg" can be recognized and played as MP3, WMA, AAC, WAV (LPCM), FLAC, ALAC or OGG Vorbis files.

(2) Save MP3, WMA, AAC, WAV (LPCM), FLAC, ALAC or OGG Vorbis files with an extension of ".mp3", ".wma", ".m4a", ".wav", ".flac", ".alac" and ".ogg".

NOTICE:

If non-MP3, non-WMA, non-AAC, non-WAV (LPCM), non-FLAC, non-ALAC or non-OGG Vorbis files are saved with an extension of ".mp3", ".wma", ".m4a", ".wav", ".flac", ".alac" and ".ogg", those files may be wrongly recognized as MP3, WMA, AAC, WAV (LPCM), FLAC, ALAC or OGG Vorbis files and played. A loud noise may occur and damage to the speakers may result.

"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 radio receiver assembly and a "Bluetooth" compatible cellular phone* can be connected using a "Bluetooth" wireless connection. This enables the 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.

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

(2) The hands-free function uses a "Bluetooth" wireless connection. A "Bluetooth" wireless connection can be affected by uncertain elements, such as vehicle location, time of day, etc. Therefore, problems related to establishing connection may be caused temporarily by "Bluetooth" connection conditions. It is necessary to check the frequency of occurrence, connection conditions using another cellular phone, etc. when performing diagnosis.

(3) Compatible hands-free devices

HINT:

"Bluetooth" compatible cellular phone can be checked at http:// www.lexus.com/Enform/.

(d) "Bluetooth" audio function

(1) The "Bluetooth" built-in radio receiver assembly and a "Bluetooth" compatible portable audio player* 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 radio receiver assembly.

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

(2) Compatible "Bluetooth" audio devices

HINT:

The amount of remaining battery charge displayed on the radio receiver assembly may be different from that of the "Bluetooth" device.

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 large obstructions) that deflect 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 be deflected.

(d) Noise problem

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

VEHICLE CUSTOMIZATION OUTLINE

(a) Customization of functions can also be customized on the multi-display assembly screen. Refer to the Owner's Manual for further information on customizable items for the navigation system.

"HD Radio" FUNCTION OUTLINE

(a) The "HD Radio" system is a radio system that broadcasts in the IBOC (In-Band On-Channel) form that the DTS and Ibiquity Co. have developed. By expanding the bandwidth per channel of conventional FM/AM bands, digital audio and data signals are additionally transmitted. "HD Radio" technology is manufactured under license from DTS and Ibiquity Digital Corporation. U.S. and Foreign Patents. "HD Radio" and the HD and HD Radio logos are proprietary trademarks of DTS and Ibiquity Digital Corporation. Also, traffic and weather information can be received and displayed on the navigation screen.

RBDS FUNCTION OUTLINE (w/ RBDS Function)

(a) 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.

SIRIUS XM SYSTEM FUNCTION OUTLINE (w/ SXM System)

(a) Sirius XM (SXM) satellite radio is a satellite digital radio broadcast provided by Sirius XM Satellite 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.

NOTICE:

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

HINT:

When disconnecting the cable from the negative (-) auxiliary battery terminal, the broadcast station logo data will be initialized. It takes a while for the broadcast station logo data to be updated to the latest one.

EXPORT / IMPORT MEMORY POINT FUNCTION OUTLINE

(a) This function allows memory points stored in the radio receiver assembly to be registered to another radio receiver assembly. Memory points stored in the radio receiver assembly can be exported to a USB device. Data exported to a USB device can be imported to another radio receiver assembly using a USB device.

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.

DYNAMIC VOICE RECOGNITION FUNCTION OUTLINE (w/ Dynamic Voice Recognition Function)

(a) There are two types of voice recognition; the voice recognition function uses voice recognition data stored in the onboard device. The other is communication based and uses voice recognition data sent from communication with the DCM (telematics transceiver) as audio signals to be stored at the center.

HINT:

Refer to the Lexus Enform system for information about communication based voice recognition.

Click here

"Wi-Fi" hotspot OUTLINE (w/ "Wi-Fi" hotspot Function)

(a) "Wi-Fi" is a worldwide wireless communication standard widely used as a short range communication tool.

(b) "Wi-Fi" is a registered trademark owned by Wi-Fi Alliance, a non-profit industry association.

(c) The radio receiver assembly uses the 2.4 GHz frequency band for "Wi-Fi" communication.

HINT:

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

DYNAMIC NAVIGATION FUNCTION OUTLINE (w/ Dynamic Navigation Function)

(a) The dynamic navigation function is a function that provides more convenient route guidance by using communication from the DCM (telematics transceiver), the travel history data accumulated in the server, the latest traffic information, and map information via temporary map distribution in addition to the route guidance function built into the head unit.

HINT:

Refer to the Lexus Enform system for information about the communication function.

Click here

"Apple CarPlay" FUNCTION OUTLINE

(a) The "Apple CarPlay" function is a function that enables the head unit to operate applications on a smartphone by connecting the smartphone to the head unit using a dedicated cable.

"Android Auto" FUNCTION OUTLINE

(a) The "Android Auto" function is a function that enables the radio receiver assembly to operate applications on a smartphone by connecting the smartphone to the radio receiver assembly using a dedicated cable.

HINT:

Some applications have a display restriction in consideration of safe driving.

eOwner's MANUAL FUNCTION OUTLINE

(a) The eOwner's Manual can be used by installing it to the radio receiver assembly.

HINT:

Re-install the eOwner's Manual when replacing the radio receiver assembly.

DIAGNOSTIC FUNCTION OUTLINE

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

COMMUNICATION SYSTEM

(a) MOST Network Outline

(1) Navigation 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 radio receiver assembly.

(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.

(b) 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 radio receiver assembly.

(c) Local Bus Communication Outline

(1) Components of the navigation system communicate with each other via the local bus.

(2) The local bus uses a twisted pair of wires for its communication lines.

(3) The master unit of the local bus is the radio receiver assembly.

(d) CAN Communication Outline

(1) The navigation system uses CAN communication between the radio receiver assembly and ECUs.

TOUCH FUNCTION CANCELLATION FUNCTION OUTLINE

(a) Touch function cancellation function

(1) The touch function cancellation function disables touchpad operation of the remote touch, if it is not operated for 12 seconds or more.

Click here

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