Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Navigation System / Overview

The navigation system provides audible and visual route guidance information to enable the driver to reach a desired destination. The system allows the driver to choose the route using minor or major roads or highways with the option of three routes.

The navigation system is integrated with the audio system and shares a number of components common to all systems.


Map information is stored on a Secure Digital (SD) memory card located the portable audio interface panel. The AHU reads the map data directly from the SD card.


Map information is stored on a hard disc drive located in the Integrated Audio Module (IAM). Map updates to the hard drive can be uploaded by the customer from a Universal Serial Bus (USB) flash drive via the portable audio interface panel.

In Japan/Asia market specification vehicles the map information is located in a Navigation Control Module (NCM). Map updates are supplied on an SD memory card.


The navigation system has various levels of user control through the Touch Screen (TS) and the Land Rover Voice system. System volume adjustment can be made using the TS and the left steering wheel switchpack.

There are a number of navigation system variants specific to various markets. On all systems the Global Navigation Satellite System (GNSS) signal is received by the Global Positioning System (GPS) antenna located in the roof pod.

The European navigation system includes the Traffic Message Channel (TMC) function, which receives traffic information from an Frequency Modulation (FM) antenna integrated into the rear window. On a preselected route, the system will offer re-routing options depending on traffic conditions.

All North America Specification (NAS) vehicles are configured to receive TMC. TMC is transmitted in the USA and is available in areas of other NAS markets.

The navigation system is primarily controlled from the Touch Screen (TS) which is located in the center of the instrument panel. Control signals from the TS are sent on the Media Oriented System Transport (MOST) ring to the navigation software within the IAM or AHU. The IAM or AHU uses a dedicated Gigabit Video InterFace (GVIF) bus to transmit video signals to the TS.

The navigation system uses the following components:

  • IAM or AHU
  • Single or dual-view TS
  • Roof pod GPS antenna
  • Instrument Cluster (IC)
  • Head Up Display (HUD).

The dual-view TS allows the front seat passenger to view television and video images when the car is being driven. The dual-view screen allows the driver to see the navigation or other system screens but not the TV or video when the vehicle is moving. The screen can be switched between single and dual view using a switch on the TS.


Due to legislation, the NAS markets do not receive this dual-view option.

On vehicles fitted with the Head Up Display (HUD), turn by turn navigation images are displayed to the driver on the windshield.

For additional information, refer to: Instrument Cluster (413-01, Description and Operation).


Japanese market vehicles have a modified system from other markets.

These vehicles have an additional Digital Versatile Disc (DVD) Navigation Computer Module (NCM) and a Navigation Interface Module (NIM) located below the front right seat.

The Japanese navigation system includes the Vehicle Information and Communication System (VICS) function. The VICS supplies information to enable the NCM to re-route the navigation guidance or to inform the vehicle driver of traffic conditions in the vehicles vicinity. VICS information is obtained through an FM antenna integrated into the rear window and a VICS beacon antenna located on the left side of the instrument panel.


These markets use a remote Navigation Control Module (NCM) located below the front left seat. The NCM uses an SD memory card for map data.


Korea market has a unique system which is fitted to the vehicle by the dealer or port of entry. These vehicles are supplied with the necessary wiring in place, but have a separate Navigation Control Module (NCM) located below the front right seat fitted by the dealer. The NCM uses an SD memory card for map data.


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