Navigation system (Navigation Computer): Description and operation (page 4 of 6)

Service Menu The service menu provides access to details of the navigation computer hardware and software, and can be accessed when the navigation computer is in radio mode, by simultaneously pressing the NAV button and the 10 multifunction buttons. The following items can then be scrolled through by pressing the Nxt (next) and Prv (previous) multifunction buttons, or turning the RH rotary control: l Model No. l Serial No. l Changer Reset l GAL l Radio Software l Radio Bolo l Navi Rom l Navi Flash l RTC Value

When Changer Reset is displayed, the CD autochanger (where fitted) can be reset by pressing the appropriate multifunction button.

When the End multifunction button is pressed, the navigation computer quits the service menu and returns to radio mode.

Garage Menu Garage menu enables the navigation system to be tested and calibrated, and also contains a route navigation demonstration. The garage menu is entered from the main navigation menu, as follows: 1 Press the Nav button to access the system settings. 2 Press and hold multifunction button 3, then press multifunction button 5 to display the garage menu.

The garage menu contains the following, which can be accessed using the RH rotary control: l CALIBRATION RIDE – Used to calibrate the navigation computer, to enable route navigation. l GPS INFO– Provides functional test of antenna by checking GPS reception. If functioning correctly, displays the number of satellites being received, the date, time (Greenwich Mean Time) and the type of positional fix currently possible. l CALIBRATION– Allows vehicle specific calibration data to be entered, e.g. tyre size. Also allows current calibration to be deleted prior to re-calibrating.

NOTE: Only known calibration data should be entered. The navigation computer cannot make route calculations if incorrect data is entered.

l SENSORS– Allows wheel speed, reverse gear and gyro sensor inputs to be checked. l VERSION– Displays navigation computer hardware and software details. l SPEECH TEST– Performs a test of the navigation computer audio output. l MODULE TEST– Performs a test routine on the internal components of the navigation computer. l DEMO – Allows a route navigation demonstration to be run.

To quit the garage menu, press the Nav button.

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.