Range Rover. Manual - part 333

NAVIGATION SYSTEM

DESCRIPTION AND OPERATION

OPERATION

Display and Control Unit

Rotary Menu Controller

Turning the rotary menu controller one step
counter-clockwise sends a message to the navigation
computer. If the highlighted cursor is not at the top of
the list, then the navigation computer should respond
by moving the cursor up one position. If the cursor is
at the top of the list then there should be no action. If
the cursor is on a horizontal list the cursor should
move one step left.

Turning the rotary menu controller one step clockwise
sends a message to the navigation computer. If the
highlighted cursor is not at the bottom of the list, then
the navigation computer should respond by moving
the cursor down one position. If the cursor is at the
bottom of the list then there should be no action. If the
cursor is on a horizontal list the cursor should move
one step right.

Pressing and releasing the rotary menu controller
sends a message to the navigation computer. The
navigation computer should select the currently
highlighted menu item or icon and change the display
appropriately. If the LCD screen is switched off,
pressing and releasing the rotary menu controller will
switch the screen on.

Mute Key

Pressing and releasing the mute key causes the mute
status LED to be ’lit’. By having the mute function
enabled (LED on), this causes any audio instructions
given by the navigation system to be disabled. If the
mute function is already enabled (LED on), pressing
and releasing the mute key will cause it to be
disabled.

Repeat Key

Pressing and releasing the repeat key causes the last
audio instruction given by the navigation system to be
repeated through the vehicle speakers.

Re-Rte Key

Pressing and releasing the Re-Rte key, in road
navigation during guidance, causes the deviation
menu to overlay onto the screen, and the user is then
able to select a deviation distance between 0 and 6
miles. The system then calculates a new route once
the rotary menu controller has been pushed to accept
the deviation distance.

Menu key

Pressing and releasing the Menu key causes the main
menu screen to be displayed on the LCD. Pressing
and releasing the menu key while the screen is off
sends a message to the navigation computer. The
navigation computer should respond by turning the
LCD screen on and presenting the main menu.

Navigation Computer - Gyro Sensor

The piezo gyro sensor measures the motion of the
vehicle around its vertical axis using the Coriolis force.
The Coriolis force is a force which accelerates a
foreign body moving away from the rotational axis
against the direction of rotation of that axis.

In operation, a mass inside the sensor is excited to a
point where it begins to vibrate, similar to the principle
of a tuning fork. The vibrations travel perpendicular to
the rotational axis and cause continuous potential
charge of the mass in relation to the rotational axis.
The forces can be measured easily and are converted
into a yaw rate to calculate direction.

NAVIGATION SYSTEM

NEW RANGE ROVER

DESCRIPTION AND OPERATION

Peizo Gyro Sensor

1. Driver elements
2. Retaining element
3. Amplifier
4. Phase detector
5. Frequency filter
6. Navigation computer
7. Driver stage

The sensor is supplied with a current from a driver.
The driver is used to induce vibrations in the driver
elements and retaining elements. As the vehicle turns
a corner, i.e.; a left hand bend, the rotational motion is
detected by the retaining elements, caused by the
Coriolis force, and a small electrical voltage is
produced.

The voltage is passed to an amplifier and the
amplified signal is then passed to a phase detector.
The phase detector establishes the direction of
rotation and passes a signal to a frequency filter.
Because the gyro sensor is subject to vibrations
produced by means other than cornering, the
frequency filter analyses the signals and removes
signals not produced by cornering forces. The filtered
signal is passed from the frequency filter to the
navigation computer which uses it to calculate
direction of travel.

NAVIGATION SYSTEM

DESCRIPTION AND OPERATION

Software Loading

The system is capable of having operating software
loaded via the CD-ROM drive. This allows for different
languages to be loaded and also allows systems to be
updated when new software/features are available.
The Navigation computer is delivered pre-loaded with
operating software, 2 default languages and the Off
Road navigation software. The 2 pre-loaded
languages are:-

•

UK English (Female)

•

German (Male)

Software loading can be achieved at any time by
inserting Software CD into the CD-ROM drive. The
navigation computer compares of the version of
software on the CD with that currently loaded. If the
software version on CD is a later version it
automatically starts to load the software. The status of
software loading is displayed on the display and
control unit’s screen. On completion of software
loading, the CD is automatically ejected. The user is
prompted to remove the CD and confirm. The
computer then resets and restarts with the new
software.

Language loading is also achieved by inserting the
software CD (as this also contains all the navigation
languages). By selecting a language to load, then
selecting a language to delete in its place the
replacement language is loaded with a status screen
to accompany it. On completion of language loading,
the CD is automatically ejected from the navigation
computer. The computer then resets and restarts with
the new language loaded. This needs to be selected
from the settings menu.

Diagnostics Mode

The navigation system may be put into a on-board
diagnostics mode (service mode) by selecting the
’settings’ menu from the main menu then pushing and
holding the menu key for about 10 seconds. The
service mode has four main functions:

1. To check that components are fitted and to

determine their hardware/software levels.

2. To perform a quick ’health check’ of the major

input signals to the system.

3. To check for correct operation of the Display and

Control unit keys.

4. To check the status of the GPS reception.

Selecting the On-Board Monitor item from the service
mode menu causes the version info to be displayed.
The screen displays the software and hardware level
of the display and control unit together with the
diagnostics and bus index. The supplier of the unit is
also displayed as a number code defined by BMW.
The system queries the display and control unit before
displaying the information on the screen. If the unit
responds with Software Hardware levels this implies
that the component is connecting to at least Power,
Ground and K-bus.

NAVIGATION SYSTEM

NEW RANGE ROVER

DESCRIPTION AND OPERATION

Display and Control Key Check

Selecting ’Key Function ’ from the display and control
units ’Functions’ menu displays three pieces of
information:

1. Key - This item displays a value indicating

whether any keys are pressed and if so which
one. With no key pressed the value ’FF’ should
be displayed. If any other value is shown then it
may indicate that a key is sticking. The sticking
key can be determined by one of the following
codes:

•

01 Mute key

•

02 Re-Rte key

•

03 Menu key

•

04 Repeat key

•

05 Rotary-turn push

•

FE Multiple key presses

•

FF No key pressed

2. OBM Increment Sensor - This value should

decrease if the rotary menu selector is turned
clockwise and increase if the rotary menu
selector is turned anticlockwise.

3. Radio Increment Sensor - This value will not

If there is no user action on the display and control
unit for 3 seconds, the system stops updating the
values, and the ’Functions’ item becomes active.

Selecting ’<Return’ returns the system to the Service
Mode menu.

Brightness

Selecting ’Brightness’ from the display produces a
pop-up menu with a selecting ’Slider’. This allows the
user to alter the brightness setting on the display by
moving the slider up and down with the rotary menu
controller. Pushing the rotary menu controller accepts
the new value.

Selecting ’<Return’ returns the system to the Service
Mode menu.

Navigation Computer Version Information

Selecting the Navigation/ Graphic Element item from
the service mode menu causes the Version
information of the Navigation computer to be
displayed. The screen displays the software and
hardware level of the navigation computer together
with the diagnostics and bus index. The supplier of the
unit is also displayed as a number code defined by
BMW.

Selecting ’<Return’ returns the system to the service
mode menu.

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