NAVIGATION SYSTEM (for HDD) > SYSTEM DESCRIPTION

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NAVIGATION SYSTEM OUTLINE

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)

Operation	Description
Vehicle Position Calculation	The navigation computer sub-assembly calculates the current vehicle position (direction and current position) using the direction deviation signal from the gyro sensor and driving distance signal from the vehicle speed sensor and creates the driving route.
Map Display Processing	The navigation computer sub-assembly processes the vehicle position data, vehicle driving track and map data from the hard disk drive.
Map Matching	The map data from the hard disk drive is compared to the vehicle position and driving track data. Then, the vehicle position is matched with the nearest road.
GPS Correction	The vehicle position is matched to the position measured by the GPS. Then, the GPS measurement position data is compared with the vehicle position and driving track data. If the position is very different, the GPS measurement position is used.
Distance Correction	The vehicle speed signal includes error caused by tire wear and slippage between the tires and road surface. Distance correction is performed to account for this. The navigation computer sub-assembly automatically offsets the signal to make up for the difference between the distance signal and 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 GPS signals cannot be received. When only autonomous navigation is used, however, the mapping accuracy may slightly decrease.

Autonomous navigation
This method determines the relative vehicle position based on the driving track determined by the gyro located in the navigation computer sub-assembly and the vehicle speed signal.
1. Gyro sensor
  Used to calculate the direction by detecting angular velocity. It is located in the navigation computer sub-assembly.
2. Vehicle speed signal
  Used to calculate the vehicle driving distance.

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.

Number of Satellites	Measurement	Description
2 or less	Measurement is 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.

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 hard disk drive and the vehicle position is set onto the most appropriate road.

MULTI-DISPLAY OUTLINE

A pop-up type multi-display is built into the center instrument cluster finish panel assembly. Opening, closing and tilt angle adjustments of the multi-display can be performed using the multi-display switch.

REMOTE TOUCH OUTLINE

HINT:

The navigation system is remotely controlled using the remote touch switch knob and switches.
The remote touch is equipped with a feedback force function.
When the remote touch switch knob is operated, the built-in 2-axis motors are controlled. The motors are used to provide feedback force for the knob according to the pointer operation displayed on the multi-display.
The feedback force of the remote touch allows the users to select icons easily when operating the navigation system.

Remote Touch Switch Knob Operation
1. Movement of the pointer on the multi-display screen is synchronized with knob operation.
  HINT:
  1. During remote touch switch knob operation, the distance that the knob moves is sent to the navigation computer sub-assembly as operational coordinates. The range of operational coordinates for the lateral and longitudinal axes is between 0 and 255.
  2. The multi-display also has operational coordinates that range from 0 to 255 for the lateral and longitudinal axes. The navigation computer sub-assembly displays the pointer according to the operational coordinates from the knob.

Remote Touch Switch Knob Feedback Force
1. The remote touch has 2 built-in motors. These motors control both lateral and longitudinal axes and generate feedback force according to remote touch switch knob operation.
  HINT:
  1. There are 3 types of feedback force image areas (Icons, Frames and Others) are provided on the multi-display screen. The feedback force changes depending on the area.
  2. The navigation computer sub-assembly sends a feedback force request signal to the remote touch according to the pointer location displayed on the multi-display.
  3. When the remote touch receives the feedback force request signal, the remote touch controls the motors and generates 3 types of feedback force according to the operation direction of the remote touch switch knob.
  4. The strength of feedback force generated by the remote touch can be adjusted. Refer to the owner's manual for further information.
2. Icon Area
  
  HINT:
  1. When the pointer comes close to an icon area, force will be provided to pull the pointer toward the center of the icon area.
  2. Stronger force is provided while driving than while parked.
3. Frame Area
  
  HINT:
  Frame areas are provided for the edges of all display screens. When the pointer comes close to the edge of the screen, force will be provided to move the pointer away from the edge of the screen.
4. Other Area
  
  HINT:
  1. When the pointer is in an area other than one of those specified, resistance will be provided that is proportional to the remote touch switch knob operation speed.
  2. Stronger resistance is provided on the map screen than on other screens.

DVD (DIGITAL VERSATILE DISC) PLAYER OUTLINE

The DVD player can only play DVD videos, DVD audio and video CDs that have any of the following marks:
1. Precaution for use of discs
  NOTICE:
  1. SECAM color television standard discs cannot be played (PAL and NTSC discs can be played).
  2. Keep the discs away from dirt. Be careful not to damage the discs or leave fingerprints on them.
  3. Hold discs by the outer edge and center hole with the label side up.
  4. 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.
  5. Do not use odd-shaped discs because these may cause player malfunctions.
  6. Do not use discs whose recording portion is transparent or translucent because they may not be inserted, ejected or played normally.
  7. Dual Discs that mate DVD recorded material on one side with CD digital audio material on the other cannot be played.

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:
  1. Pressing on the disc by hand or rubbing the disc with a hard cloth may scratch the disc surface.
  2. 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.

"Bluetooth" OUTLINE

"Bluetooth" is a trademark owned by Bluetooth SIG, Inc.
"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.

Hands-free function
1. The "Bluetooth" built-in radio receiver assembly and a "Bluetooth" compatible cellular phone*1 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.
  *1: Some versions of "Bluetooth" compatible cellular phones may not function.

RDS-TMC FUNCTION OUTLINE (BROADCAST IN EUROPE ONLY)

This system has a function which allows the reception of traffic information from Radio Data System Traffic Message Channel (RDS-TMC) stations based on FM-multiplex broadcasting. It assists the driver to avoid areas with traffic congestion. It also helps to improve traffic flow and road safety.
The radio receiver assembly receives RDS-TMC signals and then transmits these signals to the navigation computer sub-assembly via the MOST network.

COMMUNICATION SYSTEM

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 navigation ECU (navigation computer sub-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.

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 navigation ECU (navigation computer sub-assembly).
  HINT:
  1. The navigation computer sub-assembly has the resistance (60 to 80 Ω) necessary for communication.
  2. If a short or open circuit occurs in the AVC-LAN circuit, communication is interrupted and the system will not operate normally.

DIAGNOSTIC FUNCTION OUTLINE

The navigation system has a diagnostic function (the result will be displayed on the master unit or the intelligent tester).

DIAGNOSIS DISPLAY DETAILED DESCRIPTION

HINT:

This section 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.

Service Menu Screen

HINT:
Some items are grayed out or not displayed based on the device settings.

Failure Diagnosis Screen

HINT:

Some items are grayed out or not displayed based on the device settings.

System Check Mode Screen

*1: Node position number for devices connected to the MOST network.
HINT:
MOST node position numbers are provided for devices connected to the MOST network.

*2: Device Name List No. 1

HINT:

Device Name List No. 1 displays some of the devices that make up the navigation system.

The names of the components from Device Name List No. 1 are shown in the following table.

Name	Component	Connection Method
EMV-M	Navigation computer sub-assembly	-
AUDIO	Radio receiver assembly	Communication line for MOST network
AMP	Stereo component amplifier assembly	Communication line for MOST network
R-TOUCH	Remote touch	Communication line for MOST network
DISP	Multi-display	Communication line for AVC-LAN
CAMERA-C	Parking assist ECU	Communication line for AVC-LAN
MOTOR-C	Display module board	Communication line for AVC-LAN
CLOCK	Center cluster module circuit	Communication line for AVC-LAN
USB BOX	Multi-media interface ECU assembly	Communication line for AVC-LAN

*3: Check Result

HINT:

Result codes for all devices are displayed.
When "MOST" is displayed for the result, press "MODE" on the steering pad switch assembly to display the "MOST Line Check" screen.

Changing to the "MOST Line Check" screen is possible only when "MOST" is displayed for the result.

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 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 power supply wire harness of the device. - Check the AVC-LAN or MOST network for the device.

*4: Memory Clear
HINT:
1. Present and history DTCs and registered connected device names are cleared.
2. Press the "Memory CLR" switch for 3 seconds.

*5: Recheck
HINT:
1. A system check will be performed again after the memory is cleared.
2. The "Recheck" switch will dim during a system check.

*6: Device Name List No. 2
HINT:
1. Device Name List No. 2 displays some of the devices that make up the navigation system.
2. 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

Unit Check Mode Screen

Screen Description
Display	Content
*1: Device name	Target device
*2: History DTC	Diagnostic memory results and stored DTCs are displayed.
*3: Present DTC	DTCs output in the service check are displayed.
*4: DTC	DTC (Diagnostic Trouble Code)
*5: Timestamp	The time and date of history DTCs are displayed. (The year is displayed in 2-digit format.)
*6: Diagnosis clear switch	Selecting 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.)

HINT:

A maximum of 6 DTCs can be displayed for history and present DTCs.

MOST Line Check Screen
HINT:
1. The inspection will be performed at the time the screen changes from "System Check Mode" to "MOST Line Check".
2. The master unit checks the connection of each device on the MOST network.
1. *1: Node position number for devices connected to the MOST network.
2. *2: Device Name List
  HINT:
  1. Device Name List displays some of the devices that make up the navigation system.
  2. The names of the components from Device Name List are shown in the following table.
    
    Name
    Component
    EMV-M
    Navigation computer sub-assembly
    AUDIO
    Radio receiver assembly
    AMP
    Stereo component amplifier assembly
    R-TOUCH
    Remote touch
1. *3: Check Result
  HINT:
  1. The master unit displays the check result on the screen based on the response information from each slave unit.
  2. 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.
  3. 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.

Function Check/Setting Screen

HINT:

Some items are grayed out or not displayed based on the device settings.

Microphone & Voice Recognition Check Screen

Screen Description
Display	Content
*1: Microphone input level meter	Monitors the microphone input level every 0.1 seconds and displays the results in 8 different levels.
*2: Recording switch	Starts recording.
*3: Stop switch	Stops recording and playing.
*4: Play switch	Plays the recorded voice.
*5: Recording indicator	Comes on while recording.

HINT:

The microphone is active at all times when this screen is displayed.
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.
While recording or playing, the switches other than the stop switch cannot be selected.
When no recording is present, the play switch cannot be selected.
Recording will stop after 5 seconds or when the stop switch is selected.

GPS Information Screen

*1: 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.

*2: 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.

*3: Measurement status

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

*4: Position information

Screen Description
Display
Content
Position
Latitude and longitude information on the current position is displayed.

*5: Date information

Screen Description
Display
Content
Data
The date/time information obtained from GPS signals is displayed in Greenwich Mean Time (GMT).

Vehicle Sensors Screen

Vehicle Signal
Display
Content
*1: SPD
SPD signal condition is displayed.

Sensor Signal
Display
Content
*2: Gyro sensor
Gyro sensor output condition is displayed.
HINT:
Signals are updated once per second only when vehicle sensor signals change.

Vehicle Signal Check Mode Screen

Screen Description
Display	Content
Battery	Auxiliary battery voltage is displayed.
IG	Power 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 vehicle input signals change.

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.

Display	Content
Position	Latitude and longitude information on the current position is displayed.

Display	Content
Data	The date/time information obtained from GPS signals is displayed in Greenwich Mean Time (GMT).

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