Discovery 2. Manual — part 358

NAVIGATION SYSTEM

DESCRIPTION AND OPERATION

87-7

Calibration
Calibration is required after initial installation or replacement of the navigation computer. It may also be necessary
after repairs to system wiring and if route navigation becomes inaccurate or fails to operate. If the navigation computer
contains an existing calibration, this must be deleted, using the garage menu, prior to running the new calibration
routine. The sensor inputs should also be checked before running the calibration routine.

Sensor Check

1 Call up the SENSORS screen on the LCD:

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If the navigation CD-ROM has not been installed before, press and hold multifunction button 1 then press
multifunction button 10.

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If the navigation CD-ROM has been installed before, use the garage menu as detailed above.

2 Drive the vehicle forwards a short distance at a speed greater than 2.5 mph (4 km/h) and ensure the road speed

counter on the SENSORS screen starts to increment.

3 Select reverse gear and ensure the direction arrows on the SENSORS screen point rearwards.
4 Ensure the GPS data on the SENSORS screen is displayed and updated.

NOTE: The GPS data will randomly display a GPS MODULE FAILURE message. This is not a fault condition, and

no action need be taken, provided the GPS data switches between the GPS MODULE FAILURE message and
actual GPS data.

5 Exit the SENSORS screen:

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If the navigation CD-ROM has not been installed before, press and hold multifunction button 1 then press
multifunction button 10.

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If the navigation CD-ROM has been installed before, press the Nav button.

NAVIGATION SYSTEM

87-8

DESCRIPTION AND OPERATION

Calibration Routine

1 Park the vehicle outside in an area clear of high buildings, trees etc.

NOTE: The more open the surrounding area is, the faster the system will acquire sufficient GPS satellite signals to

begin calibration. To minimise the calibration time, the vehicle should not be moved again until the calibration
ride.

2 Turn the ignition switch to position II. If the navigation computer does not come on, press the navigation

computer ON button.

3 If necessary, use the navigation computer multifunction buttons to enter the security code.
4 Turn the ignition switch to position 0 and remove the ignition key.
5 Press the navigation computer ON button.
6 Call up the SENSORS screen on the LCD:

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If the navigation CD-ROM has not been installed before, press and hold multifunction button 1 then press
multifunction button 10.

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If the navigation CD-ROM has been installed before, use the garage menu as detailed above.

7 Turn the LH rotary control to minimum volume.
8 Wait for 30 minutes. If necessary, the vehicle can be left unattended and locked.

NOTE: Land Rover recommend a minimum of 30 minutes be allowed to elapse in order to ensure that only a short

distance need be driven to achieve calibration.

9 After the 30 minutes have elapsed, ensure the navigation computer LCD shows a GPS almanac figure of 27 or

higher.

10 Start the vehicle engine and allow to idle.
11 Install the navigation CD-ROM.
12 Wait until the navigation computer LCD prompts for a language to be selected. Turn the RH rotary control to

scroll through the options, highlight the required language and press the RH rotary control to select.

13 The navigation computer LCD will prompt for a voice to be selected. Turn the RH rotary control to scroll through

the options, highlight the required voice and press the RH rotary control to select.

14 Wait until the navigation computer LCD advises "language has been loaded OK". Press the RH rotary control to

confirm the language and voice selections.

15 The navigation computer LCD will default to the CALIBRATION RIDE screen and should show the

CALIBRATION RIDE CAN START message. The GPS data and the road speed counter will also be shown.

16 Drive the vehicle over a road route approximating that shown below (it is not necessary to copy the route

exactly). Calibration is complete when the navigation computer LCD switches to show DESTINATION & POI
and the satellite graphic. If all the pre calibration ride conditions were complied with, calibration is typically
achieved within 3 miles (5 km) and usually occurs when the vehicle returns to the start point. However,
calibration may be achieved earlier in the journey and, if it is, there is no need to complete the remainder of the
calibration route.

17 After calibration is achieved, return to the dealership, park the vehicle and stop the engine.
18 Turn the ignition switch to position I.
19 Use the system settings menu to set the navigation computer to local time and the required units of measure:

a Press the Nav button.

b Turn the RH rotary control to scroll through the displayed menu, highlight TIME and press the RH rotary

control to select. Press the + or – multifunction button to adjust the time in 30 minute steps. Select the 24
hour clock and confirm by pressing the OK multifunction button.

c If metric units of measure are required, go to step e) (the navigation computer defaults to metric units of

measure).

d If Imperial units of measure are required, turn the RH rotary control to scroll through the displayed menu,

highlight MEASURING UNIT and press the RH rotary control to select. Turn the RH rotary control to
highlight IMPERIAL and press the RH rotary control to select.

e Press the Nav button to return to the destination menu.

20 Calibration is complete. The navigation system is ready for use.

NOTE: The accuracy of the system will automatically be fine tuned when a further journey is made, but this is not

required as part of the calibration procedure.

NOTE: In European countries, the territory will have to be set the first time the navigation system is used, and the

first time a destination in another country is selected. The first time the navigation system is used or a destination
in another country is selected, a map is displayed with the default/current territory highlighted. To change the
territory: Press the RH rotary control to display the territory list; turn the RH rotary control to scroll through the
list and highlight the required territory; press the RH rotary control to confirm the selection.

NAVIGATION SYSTEM

DESCRIPTION AND OPERATION

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A = Distance, miles (km); B = Start/Finish point

Reset
If the navigation system malfunctions, a system reset can be triggered by simultaneously pressing the TP button and
multifunction button 1 or 3. The navigation CD will need to be installed after the system reset.

Steering Wheel Switches
The steering wheel switches provide remote control operation for some of the navigation computer functions. The
switches can be used to select between the radio/CD/navigation modes, to adjust the volume (in all modes) and to
select search/preset up/down for radio and CD operation.

Remote Control Interface Unit
The remote control interface unit converts the analogue signals from the steering wheel switches into digital signals
for use by the navigation computer. The remote control interface unit is installed in a bracket immediately below the
navigation computer.

The radio remote switches form a resistance ladder between two wires with the resistance across wires dependent
on which switch is pressed. The remote control interface unit monitors the two wires and converts their input into
Instrument (I) bus protocol messages, which it outputs on a dedicated serial link to the navigation computer.