Toyota RAV4 manuals

Toyota Sienna Service Manual: System description

1. Radio and navigation assembly outline

  1.  Conventionally, 2 separate devices, a "radio and display" and a "navigation ECU" are used. This model has adopted a new type, combining these devices into a single unit.

Radio and navigation assembly outline

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)

 Navigation system outline

Operation

Description

Vehicle Position Calculation The radio and navigation assembly calculates the current vehicle position (direction and current position) using the direction deviation signal from the gyro sensor and the running distance signal from the vehicle speed sensor and creates the driving route.
Map Display Processing The radio and navigation assembly displays the vehicle track on the map by processing 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 measurement position data from the GPS unit is compared with the vehicle position and running track data. If the position is widely 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 radio and navigation 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.

 Navigation system outline

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 receive a signal. When only autonomous navigation is used, however, the mapping accuracy may slightly decline.

  1.  Autonomous navigation
    This method determines the relative vehicle position based on the running track determined by the gyro and vehicle speed sensors located in the radio and navigation assembly.
  1.  Gyro sensor
    Calculates the direction by detecting angular velocity. It is located in the radio and navigation assembly.
  2.  Vehicle speed sensor
    Used to calculate the vehicle running distance.
  1. GPS navigation (Satellite navigation)
    This method detects the absolute vehicle position using radio waves from a GPS satellite.

    * GPS satellites were launched by the U.S.

    Department of Defence for military purposes.

 Navigation system outline

Number of satellites

Measurement

Description

2 or less Measurement 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.
  1. 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.

 Navigation system 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.

 Navigation system outline

3. DVD (Digital Versatile Disc) player outline (for navigation map)

  1. The radio and navigation assembly (built-in navigation ECU) uses a laser pickup to read the digital signals recorded on a DVD.

HINT:

CAUTION: Do not look directly at the laser pickup because the radio and navigation assembly (built-in navigation ECU) uses an invisible laser beam.

Be sure to only operate the navigation system as instructed.

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 other things.

NOTICE:

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

  1.  Usable discs
  1.  This player can only play audio CDs, CD-Rs (CD-Recordable), and CD-RWs (CDReWritable) that have any of the following marks:

CD (Compact Disc) player outline

  1. Precautions for use of discs

NOTICE:

HINT:

  1. Cleaning

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.

NOTICE:

5. MP3 / WMA OUTLINE

  1.  Playable MP3 file standards

MP3 / WMA OUTLINE

  1. Playable WMA file standards

 MP3 / WMA OUTLINE

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

NOTICE:

  1.  Usable media format
  1.  Usable media format

 MP3 / WMA OUTLINE

HINT:

  1. Standard and restrictions

 MP3 / WMA OUTLINE

  1. 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 orWMA files and played. A loud noise may occur and damage to the speaker may result.

6. AVC-LAN Description

  1.  What is AVC-LAN? AVC-LAN, an abbreviation for "Audio Visual Communication Local Area Network", is a united standard developed by the manufacturers in affiliation with Toyota Motor Corporation. This standard pertains to audio and visual signals as well as switch and communication signals.

AVC-LAN Description

  1. Purpose: Recently, car audio systems have rapidly developed and the functions have vastly changed. The conventional car audio system is being integrated with multi-media interfaces similar to those in navigation systems. At the same time, customers are demanding higher quality from their audio systems. This is merely an overview of the standardization background. The specific purposes are as follows:
  1.  To solve sound problems, etc. caused by using components of different manufacturers through signal standardization.
  2.  To allow each manufacturer to concentrate on developing products they do best. From this, reasonably priced products can be produced.

HINT:

7. Communication system outline

  1.  Components of the navigation system communicate with each other via the AVC-LAN.
  2.  The radio and navigation assembly has enough resistance (60 to 80 Ω) necessary for communication.
  3.  If a short circuit or open circuit occurs in the AVCLAN circuit, communication is interrupted and the navigation system will stop functioning.

8. Diagnostic function outline

  1.  The audio system has a diagnostic function (the result is indicated on the master unit).
  2.  A 3-digit hexadecimal component code (physical address) is allocated to each component on the AVC-LAN. Using this code, the component in the diagnostic function can be displayed.

9. Bluetooth outline

Bluetooth outline

  1.  Bluethooth is a trademark owned by Bluetooth SIG.

    Inc.

  2.  Bluetooth is a new wireless connection technology that uses the 2.4 GHz frequency band. This makes it possible to connect a cellular phone (Bluetooth compatible phone *1) to the radio and navigation assembly (the Bluetooth system is built in), and use the handsfree function of the cellular phone, even if it is in a pocket or bag. As a result, it is not necessary to use a connector attached directly to the cellular phone.

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

Bluetooth outline

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.

Navigation system
PARTS LOCATION SYSTEM DIAGRAM ...

How to proceed with troubleshooting
1 VEHICLE BROUGHT INTO A WORKSHOP 2 DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION Ask the customer about symptoms and confirm malfunctions. 3 CONFIRM THE SYSTEM NORMAL CONDITION 4 CHECK D ...

Other materials:

Display Signal Circuit between Radio and Navigation Assembly and Television Camera Assembly
DESCRIPTION This is the display signal circuit of the television camera assembly. WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - TELEVISION CAMERA ASSEMBLY) Disconnect the R10 connector from the radio and navigation assembly. &nbs ...

Power seat switch
Inspection 1. INSPECT FRONT POWER SEAT SWITCH  Inspect the driver side power seat switch. Measure the resistance according to the value(s) in the table below. Standard resistance: Slide switch Front vertical switch Lifter switch Reclining switch If the res ...

Reassembly
1. INSTALL LH REAR BUMPER SIDE RETAINER Install the LH rear bumper side retainer with the 3 screws. 2. INSTALL RH REAR BUMPER SIDE RETAINER Install the RH rear bumper side retainer with the 3 screws. 3. INSTALL REAR BUMPER REINFORCEMENT SUBASSEMBLY Install the rear bumper reinf ...

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