NAVIGATION SYSTEM > SYSTEM DESCRIPTION

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DIAGNOSIS DISPLAY DETAILED DESCRIPTION (SYSTEM CHECK)

HINT:
  1. This section contains a detailed description of the displays of the diagnostic mode.
  2. Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be exactly the same as on the actual vehicle.



  1. System Check Mode Display


    E111070E01


    1. Device Names and Hardware Address / *1

      HINT:
      1. Registered device names are displayed below.
      2. If a device name is unknown to the system, its physical address is shown instead.

        Address No.
        		Name
        		Address No.
        		Name
        110
        		EMV
        		120
        		AVX
        128
        		1DIN TV
        		140
        		AVN
        144
        		G-BOOK
        		178
        		NAVI
        17C
        		MONET
        		190
        		AUDIO H/U
        1AC
        		CAMERA-C
        		1B0
        		Rr-TV
        1C0
        		Rr-CONT
        		1C2
        		TV-TUNER2
        1C4
        		PANEL
        		1C6
        		G/W
        1C8
        		FM-M-LD
        		1D8
        		CONT-SW
        1EC
        		BODY
        		1F0
        		RADIO TUNER
        1F1
        		XM
        		1F2
        		SIRIS
        230
        		TV-TUNER
        		240
        		CD-CH2
        250
        		DVD-CH
        		280
        		CAMERA
        360
        		CD-CH1
        		3A0
        		MD-CH
        17D
        		TEL
        		440
        		DSP-AMP
        530
        		ETC
        		5C8
        		MAYDAY
        1A0
        		DVD-P
        		1D6
        		CLOCK
        1F4
        		RSA
        		1F6
        		RSE
        480
        		AMP
        		-
        		-

    2. Check Result / *2

      HINT:
      Result codes for all devices are shown below.

      Result
      		Meaning
      		Action
      OK
      		Device did not respond with DTC (excluding communication DTCs from the AVC-LAN)
      		-
      EXCH
      		Device responds with "replace" type DTC
      		Check DTC in "Unit Check Mode" and replace device
      CHEK
      		Device responds with "check" type DTC
      		Check DTC in "Unit Check Mode"
      NCON
      		Device was previously present, but does not respond in diagnostic mode
      		Check power supply wire harness of device
      Check AVC-LAN of device
      Old
      		Device responds with "old" type DTC
      		Check DTC in "Unit Check Mode"
      NRES
      		Device responds in diagnostic mode, but gives no DTC information
      		Check power supply wire harness of device
      Check AVC-LAN of the device

    3. Code Clear / *3
      Present DTCs are cleared.

    4. Memory Clear / *4
      Present and past DTCs and registered connected device names are cleared.



  2. Diagnosis Menu Display


    I100056

    HINT:
    Each item is grayed out or not displayed based on the device settings.



  3. Unit Check Mode Screen


    I100057E07


    Screen Description 
    Display
    		Contents
    Device Name / *1
    		Target device
    Segment / *2
    		Target device logical address
    DTC / *3
    		DTC (Diagnostic Trouble Code)
    Time Stamp / *4
    		Time and date of past DTCs (Year is displayed in 3 digit format)
    Present Code / *5
    		DTC output at service check
    Past Code / *6
    		Diagnostic memory result and recorded DTCs



  4. LAN Monitor (Original) Screen


    E111071E01


    Check result 
    Result
    		Meaning
    		Action
    No Err
    (OK)
    		There are no communication DTCs
    		-
    CHEK
    		Device responds with a "check" type DTC
    		Check DTC in "Unit Check Mode"
    NCON
    		The device was previously present, but does not respond in diagnostic mode
    		Check power supply wire harness of device
    Check the AVC-LAN of device
    Old
    		The device responded with an "old" type DTC
    		Check DTC in "Unit Check Mode"
    NRES
    		Device responds in diagnostics mode, but gives no DTC information
    		Check power supply wire harness of device
    Check AVC-LAN of device

    HINT:
    Check results of all the devices are displayed.



  5. LAN Monitor (Individual) Screen


    I100059E05


    Screen Description 
    Display
    		Contents
    Device name / *1
    		Target device
    Segment / *2
    		Target logical address
    DTC / *3
    		DTC (Diagnostic Trouble Code)
    Sub-code (device address) / *4
    		Physical address stored with DTC (If there is no address, nothing is displayed)
    Connection check No. / *5
    		Connection check number stored with DTC
    DTC occurrence / *6
    		Number of times the same DTC has been recorded


DIAGNOSIS DISPLAY DETAILED DESCRIPTION (DISPLAY CHECK)


  1. Vehicle Signal Check Mode Screen


    I100060E04


    Name
    		Contents
    Battery
    		Battery voltage is displayed
    PKB
    		Parking brake ON / OFF state is displayed
    IG
    		Engine switch ON / OFF state is displayed
    SPEED
    		Vehicle speed is displayed in km/h
    TAIL
    		Tail signal (headlight dimmer switch) ON / OFF state is displayed

    HINT:
    1. Only items sending a vehicle signal will be displayed.
    2. This screen is updated once per second when input signals to the vehicle are changed.


DIAGNOSIS DISPLAY DETAILED DESCRIPTION (NAVIGATION CHECK)


  1. Navigation Check MENU Screen


    I100061E04

    HINT:
    Each item is grayed out or not displayed based on the device settings.



  2. GPS Information Screen


    I100062E06


    1. Satellite information / *1
      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 / *2

      (DENSO made) 
      Display
      		Contents
      T
      		System is receiving a GPS signal, but is not using it for location
      P
      		System is using the GPS signal for location
      -
      		System cannot receive a GPS signal

      (AISIN made) 
      Display
      		Contents
      01H
      		System cannot receive GPS signal
      02H
      		System is tracing satellite
      03H
      		System is receiving GPS signal, but is not using it for location
      04H
      		System is using GPS signal for location

    3. Measurement information / *3

      Display
      		Contents
      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 / *4

      Display
      		Contents
      Position
      		Latitude and longitude information on current position is displayed

    5. Data information / *5

      Display
      		Contents
      Date
      		Date / time information obtained from GPS signal is displayed in Greenwich Mean Time (GMT). Last 4 digits are displayed.



  3. Vehicle Signal Check Screen


    I100063E06


    Vehicle signal 
    Display
    		Contents
    REV / *1
    		REV signal ON / OFF state is displayed
    SPD / *2
    		SPD signal condition is displayed

    Sensor signal 
    Display
    		Contents
    Gyro sensor / *3
    		Gyro sensor output condition is displayed (when the vehicle runs straight or is stationary, voltage is approximately 2.5 V)

    HINT:
    Signals are updated once per second only when vehicle sensor signals are changed.



  4. Parts Information Screen


    I100064E06


    Screen Description 
    Display
    		Contents
    Navigation Manufacturer / *1
    		Navigation ECU manufacturer is displayed
    Navigation Version / *2
    		Navigation ECU version is displayed
    Disc Manufacturer / *3
    		Map disc manufacturer is displayed
    Disc Manufacturer No. / *4
    		Map disc version is displayed



  5. Memory Copy / Paste Screen


    I100065

    HINT:
    1. This function cannot be used on some vehicles.
    2. When using this function, perform the "Color Bar Check" and "Microphone Check".
    3. "Color Bar Check" (Click here).
    4. "Microphone Check" (Click here).


NAVIGATION SYSTEM OUTLINE

  1. Vehicle position tracking methods.

    1. 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 tracking methods are used in conjunction with each other.

      HINT:
      *: GPS (Global Positioning System)



      1. E109539E01


        Operation
        		Description
        Vehicle Position Calculation
        		Navigation ECU calculates current vehicle position (direction and current position) using direction deviation signal from vehicle speed sensor and creates driving route.
        Map Display Processing
        		Navigation ECU displays vehicle tracking on map by processing vehicle position data, vehicle running track, and map data from map disc.
        Map Matching
        		Map data from map disc is compared to vehicle position and running track data. Then, vehicle position is matched with nearest road.
        GPS Correction
        		Vehicle position is matched to position measured by GPS. Then, measurement position data from the GPS is compared with vehicle position and running track data. If position is very different, GPS measurement position is used.
        Distance Correction
        		Running distance signal from vehicle speed sensor includes errors caused by tire wear and slippage between tires and road surface. Distance correction is performed to account for this. Navigation ECU automatically offsets running distance signal to make up for difference between it and distance data of map. 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 a place where GPS radio waves cannot be received. When only autonomous navigation is used, however, the mapping accuracy may slightly decline.



        I100028E05

  2. 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 assembly.

    2. Vehicle speed sensor
      Used to calculate the vehicle running distance.



  3. GPS navigation (Satellite navigation)
    This method detects the absolute vehicle position using GPS radio waves.

    HINT:
    GPS satellites were launched by the U.S. Department of Defense for military purposes.


    I100029E02


    Number of Satellites
    		Measurement
    		Description
    2 or less
    		Measurement impossible
    		Vehicle position cannot be obtained because number of satellites is insufficient
    3
    		2-dimensional measurement is possible
    		Vehicle position is obtained based on current longitude and latitude data (This is less precise than 3-dimensional measurement)
    4
    		3-dimensional measurement is possible
    		Vehicle position is obtained based on current longitude, latitude and altitude data



  4. 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.


    I100030E04


DVD (DIGITAL VERSATILE DISC) PLAYER OUTLINE (FOR NAVIGATION MAP)

  1. The navigation ECU uses a laser pickup to read the digital signals recorded on a DVD.

    CAUTION:
    Because the navigation system uses an invisible laser beam, do not look directly at the laser pickup. Be sure to only operate the navigation as instructed.

    HINT:
    1. Do not disassemble any part of the navigation ECU.
    2. Do not apply oil to the navigation ECU.
    3. Do not insert anything but DVDs into the navigation ECU.


MULTI-DISPLAY 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.


    E106414E01


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.


    I100032E04

  2. Purpose:
    Recently, car audio systems have rapidly developed and the functions have vastly changed. The conventional car audio system is being integrated with a multimedia interface similar to those in navigation systems. At the same time, customers are demanding higher quality from their audio systems. This is an overview of the AVC-LAN standardization. Its 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:
      1. If a +B or GND short is detected in the AVC-LAN circuit, communication is interrupted and the audio system will stop functioning.
      2. If an audio system is equipped with a navigation system, the multi-display unit acts as the master unit. If a navigation system is not equipped, the audio head unit acts as the master unit instead.
      3. The radio receiver assembly provides resistance to make communication possible.
      4. A car audio system with an AVC-LAN circuit has a diagnostic function.
      5. Each component has a specified number (3-digit) called a physical address. Each function has a number (2-digit) called a logical address.
      6. Components of the navigation system communicate with each other via the AVC-LAN.


BLUETOOTH ONLINE


  1. BLUETOOTH is a wireless connection technology that uses the 2.4 GHz frequency band. This makes it possible to remotely connect a cellular phone (BLUETOOTH-capable phone) to the multi-display (BLUETOOTH system is built-in), and use a hands-free function with the cellular phone even when it is in your pocket or bag.

    HINT:
    Some versions of BLUETOOTH may vary depending on obstructions or radio wave conditions between communication devices, electromagnetic radiation, communication device sensitivity, or antenna capacity.


    E107080E01


SYSTEM NORMAL CONDITION CHECK

  1. If a symptom is applicable to any of the following, it is not a malfunction.

    Symptom
    		Answer
    A longer route than expected is chosen
    		Depending on road conditions, navigation ECU may determine that longer route is quicker
    Even when distance priority is high, shortest route is not shown
    		Some paths may not be chosen due to safety concerns
    When the vehicle is put into motion immediately after engine start, the navigation system deviates from actual position
    		If vehicle starts before navigation system activates, system may not react
    When running on certain types of roads, especially new roads, vehicle position deviates from actual position
    		When vehicle is driving on new roads not available on map disc, system attempts to match it to another nearby road, causing position mark to deviate



  2. The following symptoms are not a malfunction, but are caused by errors inherent in the GPS, gyro sensor, speed sensor, and navigation ECU.



      I100066E02

    1. The current position mark may be displayed on a nearby parallel road.



      2. I100067E02

    2. Immediately after a fork in the road, the current vehicle position mark may be displayed on the wrong road.



      3. I100068E02

    3. When the vehicle turns right or left at an intersection, the current vehicle position mark may be displayed on a nearby parallel road.



      4. I100069E02

    4. When the vehicle is transported, such as on a ferry, and the vehicle itself is not running, the current vehicle position mark may be displayed in the position where the vehicle was until a measurement is performed by the GPS.



      5. I100070E02

    5. When the vehicle runs on a steep hill, the current vehicle position mark may deviate from the correct position.



      6. I100071E02

    6. When the vehicle makes a continuous turn of 360°, 720°, 1,080°, etc., the current vehicle position mark may deviate from the correct position.



      7. I100072E02

    7. When the vehicle moves erratically, such as during constant lane changes, the current vehicle position mark may deviate from the correct position.



      8. E106418

    8. When the engine switch is turned on (ACC) / off while on a turntable before parking, the current vehicle position mark may not point in the correct direction. The same will occur when the vehicle comes out of parking.



      9. I100074E02

    9. When the vehicle is driven on a snowy road or mountain path with chains installed or a spare tire installed, the current vehicle position mark may deviate from the correct position.



      10. I100075E02

    10. When a tire is changed, the current vehicle position mark may deviate from the correct position.

      HINT:
      1. The diameter of the tire may change, causing a speed sensor error.
      2. Performing the "tire change" in calibration mode will allow the system to correct the current vehicle position faster.