Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21pl9 cistsdes
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
>> Download cistsdes documenatation <<
Text preview - extract from the document
05-1258
DIAGNOSTICS - NAVIGATION SYSTEM
05FG3-04
SYSTEM DESCRIPTION
1. Radio and navigation assy outline
(a) Conventionally, 2 separate devices, a "radio and display assy" and a "navigation ECU" are used. This
model has adopted a new type, combining these devices into a single unit.
Radio and Display Assy
Radio and Navigation Assy
Navigation ECU
I38170
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1441
05-1259
DIAGNOSTICS - NAVIGATION SYSTEM
2. 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)
GPS satellite
Location by
autonomous navigation
Navigation
Gyro Sensor
Location by GPS Antenna
GPS navigation
Vehicle Speed Sensor ECU
GPS Antenna Radio and Navigation Assy
Receive satellite Detect the
GPS correction
radio wave measurement position
Vehicle Speed Sensor
Detect vehicle
running distance Create the current
vehicle position
tracking data
Detect direction
Navigation screen
change
Gyro Sensor
Map matching Map and current vehicle
correction position data processing
Map scrolling
Map disc Map scale switching
I38171
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1442
05-1260
DIAGNOSTICS - NAVIGATION SYSTEM
Operation Description
The navigation ECU calculates the current vehicle position (direction and current
Vehicle Position Calculation 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.
The navigation ECU displays the vehicle track on the map by processing the ve-
Map Display Processing
hicle position data, vehicle running track, and map data from the map disc.
The map data from the map disc is compared to the vehicle position and running
Map Matching
track data. Then, the vehicle position is matched with the nearest road.
The vehicle position is matched to the position measured by GPS. Then, the mea-
surement position data from the GPS unit is compared with the vehicle position and
GPS Correction
running track data. If the position is widely different, the GPS measurement position
is used.
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
Distance Correction correction is performed to account for this. The navigation ECU automatically off-
sets the running distance signal to make up for the difference between it and the
distance data of the map. The offset is automatically updated.
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.
GPS satellite
Navigation performed even where the
GPS radio wave does not reach.
F In a tunnel
F In an indoor parking lot
F Between tall buildings
F Under an overpass
F On a forest or tree-lined path
Autonomous navigation
Autonomous navigation and
GPS navigation I38172
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1443
05-1261
DIAGNOSTICS - NAVIGATION SYSTEM
(b) 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 navigation ECU.
(1) Gyro sensor
Calculates the direction by detecting angular velocity. It is located in the radio and navigation
assy.
(2) Vehicle speed sensor
Used to calculate the vehicle running distance.
(c) GPS navigation (Satellite navigation)
This method detects the absolute vehicle position using radio wave from a GPS satellite.
* GPS satellites were launched by the U.S. Department of Defence for military purposes.
Current longitude/latitude/altitude is determined using the radio wave arrival time from four satellites.
GPS
I38174
Number of satellites Measurement Description
2 or less Measurement impossible Vehicle position cannot be obtained because the number of satellites is not enough.
2-dimensional measure- Vehicle position is obtained based on the current longitude and latitude. (This is less precise
3
ment is possible than 3-dimensional measurement)
3-dimensional measure-
4 Vehicle position is obtained based on the current longitude, latitude and altitude.
ment is possible
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1444
05-1262
DIAGNOSTICS - NAVIGATION SYSTEM
(d) 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.
Start
Actual driving route
Driving route on the display
(Route by estimation)
Roads
The system compares the shape of the roads L1,
L2 and L3 to the estimated running track after the
vehicle makes a right turn. At point A, the vehicle
position differs enough from the shape of L1 that
the display switches to the road L2.
A
Map
Matching
I38177
(e) 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.
Outer Inner
Vx1 (Vy1)
Glass Vy1
Contact
Vx1 Vx2
Vy2
Vx2 (Vy2)
The touch switch detects the voltage ratio
and calculates the position on the screen.
Touch-sensitive switch position I38179
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1445
05-1263
DIAGNOSTICS - NAVIGATION SYSTEM
3. DVD (Digital Versatile Disc) player outline (for navigation map)
(a) The navigation ECU uses a laser pickup to read the digital signals recorded on a DVD.
HINT:
S Do not disassemble any part of the navigation system.
S Do not apply oil to the navigation system.
S Do not insert anything but a DVD into the navigation system.
CAUTION:
Do not look directly at the laser pickup because the navigation system uses an invisible laser beam.
Be sure to only operate the navigation system as instructed.
4. CD (Compact Disc) player outline
(a) 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. In general, CD players can
play a 4.7-inch (12 cm) or 3.2-inch (8 cm) disc.
HINT:
S Do not disassemble any part of the CD player.
S Do not apply oil to the CD player.
S Do not insert anything but a CD into the CD player.
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.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1446
05-1264
DIAGNOSTICS - NAVIGATION SYSTEM
5. AVC-LAN Description
(a) 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.
Example:
Radio and Navigation Assy
AVC-LAN Stereo Component
(Resistor 60 to 80 ) Amplifier Assy
I39082
(b) Purpose:
Recently, car audio systems have rapidly developed and the functions vastly changed. The conven-
tional 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, rea-
sonably priced products can be produced.
HINT:
S If a short to +B or short to ground is detected in the AVC-LAN circuit, communication is interrupted
and the audio system will stop functioning.
S If an audio system is equipped with a navigation system, the multi-display unit acts as the master unit.
If the navigation system is not equipped, the audio head unit acts as the master unit instead. If the radio
and navigation assy is equipped, it is the master unit.
S The radio and navigation assy provides resistance to make communication possible.
S The car audio system with an AVC-LAN circuit has a diagnostic function.
S Each component has a specified number (3-digit) called a physical address. Each function has a num-
ber (2-digit) called a logical address.
6. Communication system outline
(a) Components of the audio system communicate with each other via the AVC-LAN.
(b) The master component of the AVC-LAN is a radio and navigation assy with a 60 to 80 resistor. This
is essential for communication.
(c) If a short circuit or open circuit occurs in the AVC-LAN circuit, communication is interrupted and the
audio system will stop functioning.
7. Diagnostic function outline
(a) The audio system has a diagnostic function (the result is indicated on the master unit).
(b) 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.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1447
◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo