Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: System Description
SYSTEM DESCRIPTION
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 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.
NOTICE:
- Do not disassemble any part of the disc player.
- Do not apply oil to the disc player.
- Do not insert anything but a disc into the disc player.
(b) 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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(c) The following products may not be playable on your player.
- SACD
- dts CD
- Copy-protected CD
(d) Precautions for use of discs
NOTICE:
- 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.
- 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 may not be played.
- If there are fingerprints or scratches on a disc, the disc may not be played or the disc 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.
- DualDiscs that mate DVD recorded material on one side with CD digital audio material on the other cannot be played.
- Keep discs away from dirt. Be careful not to damage discs or leave fingerprints on them.
- Hold discs by the outer edge and center hole with the label side up.
- Leaving a 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 a disc has adhesive tape, stickers, disc labels or any traces of such labels attached, the disc may not be ejected or player malfunctions may result.
- Keep discs away from direct sunlight. (Exposure to direct sunlight may cause deformation of a disc, making the disc unusable.)
- Do not use odd-shaped discs 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) discs.
- Do not use 3 in. (8 cm) discs either with or without adaptors.
HINT:
- When it is cold or raining, if the windows fog up, mist and condensation may form in the player. In such cases, a disc may skip or stop in the middle of play. Ventilate or dehumidify the cabin for a while before using the player.
- A disc may skip if the player experiences strong vibrations when the vehicle is driven on rough roads or similar uneven surfaces.
(e) Cleaning
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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, thinners or a chemical cloth may cause damage to the disc, making the disc unusable.
USB AUDIO SYSTEM FUNCTION OUTLINE
(a) The No. 1 stereo jack adapter assembly is equipped with a USB connector. 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, it is also possible to play MP3, WMA, AAC, WAV (LPCM), FLAC, ALAC or OGG Vorbis 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:
Operation through the controls of a USB device or "iPod" cannot be performed while it is connected.
(b) USB audio system compatible devices
(1) USB device
The following device formats can be used:
| Compatible USB device formats |
|
MP3, WMA, AAC, WAV (LPCM), FLAC, ALAC or OGG Vorbis files written to a USB device with any format other than those listed above may not be played 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: 3000 (including the root folder)
- Maximum number of files in device: 9999
- Maximum number of files per folder: 255
(2) "iPod"
"iPhone", "iPod", "iPod classic", "iPod nano" and "iPod touch" are trademarks of Apple Inc., registered in the U.S. and other countries.
The following "iPod", "iPod nano", "iPod classic", "iPod touch" and "iPhone" devices can be used with this system.
Made for:
- "iPod touch" (6th generation)
- "iPod touch" (5th generation)
- "iPod nano" (7th generation)
- "iPhone 7"
- "iPhone 7 Plus"
- "iPhone SE"
- "iPhone 6s"
- "iPhone 6s plus"
- "iPhone 6"
- "iPhone 6 plus"
- "iPhone 5s"
- "iPhone 5c"
- "iPhone 5"
- "iPhone 4s"
HINT:
- This system only supports audio playback.
- Depending on differences between models or software versions, etc., some models might be incompatible with this system.
USB VIDEO SYSTEM FUNCTION OUTLINE
(a) Playable video file standards
| File format | MPEG-4, AVI Container, Windows Media Video |
| Corresponding screen size | MAX 1920 x 1080 |
| Corresponding frame rate | MAX 60i/30p |
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:
| Supported formats | WAV (LPCM), FLAC, ALAC, OGG Vorbis |
| Playable media | USB |
FILE INFORMATION OUTLINE
(a) Playable MP3 file standards
| Compatible standard | MPEG1 LAYER3, MPEG2 LSF LAYER3 |
| Compatible sampling frequency |
|
| Compatible bit rate |
|
| Compatible channel mode | Stereo, joint stereo, dual channel, monaural |
(b) 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) |
|
(c) Playable AAC file standards
| Compatible standard | MPEG4/AAC-LC |
| Compatible sampling frequency | 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 (kHz) |
| Compatible bit rate |
|
(d) Playable WAV (LPCM) file standards*
| *: Files with a sample rate higher than 48kHz are down-converted to 48kHz/24bit. | |
| Compatible sampling frequency | 8/11.025/12/16/22.05/24/32/44.1/48/88.2/96/176.4/192 (kHz) |
| Compatible bit rate | 16/24 (bit) |
(e) Playable FLAC file standards*
| *: Files with a sample rate higher than 48kHz are down-converted to 48kHz/24bit. | |
| Compatible sampling frequency | 8/11.025/12/16/22.05/24/32/44.1/48/88.2/96/176.4/192 (kHz) |
| Compatible bit rate | 16/24 (bit) |
(f) Playable ALAC file standards*
| *: Files with a sample rate higher than 48kHz are down-converted to 48kHz/24bit. | |
| Compatible sampling frequency | 8/11.025/12/16/22.05/24/32/44.1/48/64/88.2/96 (kHz) |
| Compatible bit rate | 16/24 (bit) |
(g) Playable OGG Vorbis file standards*
| *: Files with a sample rate higher than 48kHz are down-converted to 48kHz/24bit. | |
| Compatible sampling frequency | 8/11.025/16/22.05/32/44.1/48 (kHz) |
| Compatible bit rate |
|
(h) 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, and ID3 Ver. 2.2 and 2.3)
(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, 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.
(i) Usable media
(1) Only CD-ROMs, CD-Rs (CD-Recordable), CD-RWs (CD-ReWritable) and USB devices can be used to play MP3/WMA/AAC 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 may not be played.
- If there are fingerprints or scratches on a disc, the disc may not be played or 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.
(2) Only USB devices can be used to play WAV (LPCM)/FLAC/ALAC/OGG Vorbis files.
(j) Usable media format
(1) Usable media format
| Disc format | CD-ROM Mode 1, CD-ROM XA Mode 2 Form 1 |
| File format |
|
HINT:
- MP3/WMA/AAC files written in any unlisted format 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/AAC files have been added. However, only the first session can be played.
- Discs whose first session includes both music data and MP3, WMA and AAC format data may not be played.
(2) Standards 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, root folders, and folders that do not contain MP3/WMA/AAC files) |
| Maximum number of files in a disc | 255 (Including non-MP3/WMA/AAC files) |
"Bluetooth" OUTLINE
| *1 | Radio Receiver Assembly (Built-in "Bluetooth" Antenna) | - | - |
| *a | Example | *b | Cellular Network |
| *c | Cellular Phone ("Bluetooth" Compatible Type) | *d | Portable Audio Player ("Bluetooth" Compatible Type) |
| *e | "Bluetooth" Wireless Connection | - | - |
(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
| Required "Bluetooth" specifications | Ver. 2.0 or higher (Ver. 4.2 recommended) |
| Compatible profiles |
|
| Maximum number of hands-free devices that can be registered (including audio devices) | 5 |
- *1: This profile is necessary when using the hands-free function.
- *2: This profile is necessary when transferring the phonebook data.
- *3: This profile is necessary when using the message function (w/ SMS/MMS/e-mail Function).
- *4: This profile is necessary when using the LEXUS App Suite function.
HINT:
The amount of remaining battery charge displayed on the radio receiver assembly may be different from that of the "Bluetooth" device.
(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
| Required "Bluetooth" specifications | Ver. 2.0 or higher (Ver. 4.2 or higher recommended) |
| Compatible profiles |
|
| Maximum number of audio devices that can be registered (including hands-free devices) | 5 |
RADIO DESCRIPTION
(a) Radio frequency band
(1) Radio broadcasts use the radio frequency bands shown in the table below.
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(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.
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| *a | FM (Stereo) |
| *b | FM (Monaural) |
| *c | AM |
(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.
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| *a | Phasing |
| *b | Ionosphere |
(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.
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| *a | Multipath |
(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.
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| *a | Fade Out |
(d) 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 specific area | Foreign noise |
| Noise occurs when listening to an intermittent broadcast | An identical program transmitted from multiple towers can cause noise where the signals overlap | |
| Noise occurs only at night | Signal phasing | |
| FM | Noise occurs while driving in a specific area | Multipath resulting from a change in FM frequency |
"HD Radio" FUNCTION OUTLINE (w/ HD Radio Function)
(a) The "HD Radio" system is a radio system that broadcasts in the IBOC (In-Band On-Channel) form that the iBiquity Co. has 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 iBiquity Digital Corporation. U.S. and Foreign Patents. "HD Radio" and the HD and HD Radio logos are proprietary trademarks of iBiquity Digital Corporation.
SiriusXM FUNCTION OUTLINE (w/ SXM Function)
(a) SiriusXM (SXM) satellite radio is a satellite digital radio broadcast provided by SiriusXM 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 pay-type broadcasts, the customer must enter into a pay-type contract with SiriusXM 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 (-) 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 data.
VEHICLE CUSTOMIZATION OUTLINE
(a) Customization of functions can also be performed on the multi-display assembly screen. Refer to Owner's Manual for further information on customizable items for the audio and visual system.
HINT:
- Items available for customization via the audio and visual system can also be customized by using the Techstream.
- Some customize parameters displayed on the Techstream will be displayed on the "Vehicle Customization" screen for the audio and visual system. Users can customize these items.
AUTOMATIC SOUND LEVELIZER (ASL) FUNCTION OUTLINE
(a) The Automatic Sound Levelizer (ASL) function automatically adjusts the audio system volume in order to compensate for increased vehicle noise (vehicle noise tends to increase as vehicle speed increases). The ASL adjusts the volume based upon vehicle speed signals sent from the combination meter assembly.
"Wi-Fi" hotspot OUTLINE (w/ "Wi-Fi" hotspot Function)
HINT:
To use the "Wi-Fi" hotspot function, initial setup of the LEXUS App Suite function is necessary.
(a) "Wi-Fi" is a worldwide wireless communication standard widely used as a short range communication tool.
(b) "Wi-Fi" is a 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.
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.
"Android Auto" FUNCTION OUTLINE (w/ "Android Auto" Function)
(a) The "Android Auto" 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.
HINT:
- Refer to the owner's manual included with the device for information about "Android Auto" support.
- Some applications have a display restriction in consideration of safe driving.
"Apple CarPlay" FUNCTION OUTLINE (w/ "Apple CarPlay" Function)
(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.
HINT:
- Refer to the owner's manual included with the device for information about "Apple CarPlay" support.
- Some applications have a display restriction in consideration of safe driving.
MOBILE ASSISTANT FUNCTION OUTLINE (w/ Mobile Assistant Function)
(a) With a compatible portable device connected via "Bluetooth", this function allows the system to interface directly for voice recognition functions. The steering pad switch assembly is operated to start the Mobile Assistant function and the function is operated by using voice commands.
HINT:
Mobile assistant may not operate or the device may become unresponsive depending on the type of device connected, OS (iOS/Android) version or Google app version.
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 .gif)
HINT:
-
Touchpad operation of the remote touch can be resumed if any of the following conditions are met:
- The "HOME", "MENU", back or sub-function switch of the remote touch is pressed.
- A finger is slid from one side of the touchpad to the other.
-
When the handwriting input method is being used, it is necessary to enter the next stroke within 12 seconds as touchpad operation will be disabled if the touchpad is not operated for 12 seconds or more.
(The first touchpad operation to resume operation may also be detected as handwriting input, possibly resulting in a typographical error.)
COMMUNICATION SYSTEM
(a) Local Bus Communication Outline
| *a | Example | *b | Local Bus Communication Line |
| *c | Master Unit | *d | Slave Unit |
(1) Components of the audio and visual 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.
HINT:
- The radio receiver assembly has the resistance (108 to 132 Ω) necessary for communication.
- If a short or open occurs in the local bus circuit, communication is interrupted and the system will not operate normally.
(b) AVC-LAN Outline
| *a | Example | *b | AVC-LAN Communication Line |
| *c | Master Unit | *d | Slave Unit |
(1) Components of the audio and visual system communicate with each other via AVC-LAN communication.
(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.
HINT:
- The radio receiver assembly has the resistance (60 to 80 Ω) necessary for communication.
- If a short or open occurs in the AVC-LAN circuit, communication is interrupted and the system will not operate normally.
(c) CAN Communication Outline
(1) The audio and visual system uses CAN communication between the radio receiver assembly and ECUs.
DIAGNOSTIC FUNCTION OUTLINE
(a) The audio and visual system has a diagnostic function (the result is indicated on the master unit).
System Diagram
SYSTEM DIAGRAM w/ Manual (SOS) Switch w/o Manual (SOS) Switch for 9 Speakers for 12 Speakers ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the audio and visual system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT ...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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