Land Rover Discovery: Information and Message Center / Description and Operation

COMPONENT LOCATION

OVERVIEW

The message center is located in the Instrument Cluster (IC), in a central position between speedometer and the tachometer. The 5 inch Thin Film Transistor (TFT) display can be continually reconfigured to prioritize and refine the information presented to the driver.

The TFT screen displays vehicle related information to the driver, for example; engine temperature, fuel level, gear position, Terrain Response mode, cruise control, Hill Descent Control (HDC) and Head Up Display (HUD).

Driver information is also displayed, for example; navigation turn-by-turn information, voice control, trip computer information and basic audio details.

A main menu is available which allows the driver to change settings for vehicle set-up, trip computer and display settings, including HUD.

DESCRIPTION

ODOMETER

The odometer is located in the bottom ride side of the message center. The odometer displays the total distance the vehicle has traveled. The trip computer readout replaces this when the driver requests trip information display.

TRIP COMPUTER

The trip computer memory stores data for a journey or series of journeys until it is reset to zero.

The following are available on the trip computer:

• Trip distance.
• Trip average speed.
• Trip average fuel consumption.
• Instantaneous fuel consumption.
• Range available on remaining fuel.

There are 3 independent trip recordings available to view; A, B and automatic. The Instrument Cluster (IC) main menu is used to select which trip recording is displayed. The A and B memories can be set independently, while the Auto trip will reset after every ignition cycle as the vehicle moves.

The automatic trip is always available and is reset each time the engine is started and the vehicle moves. Previous trips can be added to form a continuous trip recording by pressing and releasing the trip switch on the end of the left steering column multifunction switch when the automatic trip information is displayed. The message center will confirm that the previous journey information has been added and pressing and holding the trip switch for 3 seconds will add the data. The previous trip information can also be deleted by pressing and releasing the trip switch when the automatic trip information is displayed. The message center will confirm deletion of the previous journey data and pressing and holding the trip switch for 3 seconds will delete the previous trip information.

Trip A and B can be reset by the driver at any time. When the required trip information is displayed, pressing and holding the trip switch for 3 seconds will erase the previous trip information stored. Resetting trip A or B will not affect the other trip information, for example, if trip A is reset, trip B will retain its information until it is reset.

AMBIENT TEMPERATURE

The ambient temperature is displayed in the top right side of the Thin Film Transistor (TFT) message center. The temperature can be displayed in degrees F or C and this is selectable by the driver using the Instrument Cluster (IC) main menu.

If the external temperature falls to 4ºC (39ºF) or below, the external temperature display is accompanied by an amber snowflake symbol.

The ambient temperature signal is obtained from the ambient temperature sensor located in the Passenger Door Mirror (PDM), the sensor signals are passed to the IC on the Medium Speed (MS) Controller Area Network (CAN) comfort bus from the Automatic Temperature Control Module (ATCM).

MESSAGE CENTER

The message center is located in the center of the Thin Film Transistor (TFT) screen. Other information displayed in this area will be temporarily removed to allow for the message to be displayed.

The majority of messages are generated by the cluster which monitors system status via the bus systems and displays system information messages as requested by the controlling module. Other system control modules are also capable of generating messages to display system status. Some messages are accompanied by a chime, which is requested by the control module generating the message and generated by the instrument cluster via the sounder, which is located on the back of the cluster.

The messages are displayed in priority order (if more than one message) for approximately 4 seconds as the event occurs. The driver can view current system status messages in the Instrument Cluster (IC). When the ignition is on the warning messages can be displayed using the 'show warnings' selection in the main menu.

The messages are displayed in a language applicable to the vehicle market configuration and can be changed using the IC main menu.

Main Menu

The main menu is selected using the 'joy pad' 'OK' on the right steering wheel multifunction switch. The switch allows access to the following menu functions:

• Show warnings
• Vehicle set-up.
• Trip computer.
• Display settings.
• Service menu.
• Head Up Display (HUD).

Show Warnings

If any warnings are present in the message center, pressing the 'OK' switch minimizes the warning and shows either a small red, or small amber triangle in the top corners of the Thin Film Transistor (TFT) to show a warning message has been suppressed. However, they can be retrieved by selecting 'Show Warning' from the menu and pressing the 'OK' switch. The messages will display for 2 seconds in turn if there is more then one message.

If the menu is elected and no selections are made for approximately 10 seconds, the menu is switched off.

GEAR POSITION DISPLAY

The gear position is displayed in the left bottom corner of the Thin Film Transistor (TFT) screen. It shows the current selector position P, R, N, D or S.

When the transmission is in manual Dynamic Mode, the display will show the currently selected gear ratio.

The gear position display is controlled by the Transmission Control Module (TCM). The gear position is illuminated in response to High Speed (HS) Controller Area Network (CAN) powertrain bus messages from the TCM.

NAVIGATION INFORMATION

The navigation system can display information in the Thin Film Transistor (TFT) screen. When navigation information is displayed, other information is removed while the navigation information is displayed.

HEAD-UP DISPLAY (HUD) INFORMATION

The Head Up Display (HUD) menu can be controlled from the message center menu in the Instrument Cluster (IC).

SERVICE INTERVAL INDICATOR

The service interval message will only be displayed when the vehicle has less than 3200 km (2000 miles) before the service is due. When the ignition is switched on, and the vehicle has started its service countdown, SERVICE REQ'D XXXX km (XXXX MLS) is displayed in the message centre.

When the service distance has been reached, SERVICE REQUIRED is displayed in the message centre.

On diesel models the Engine Control Module (ECM) also monitors and calculates when the time to the next oil service is required and when an oil service is required, 'Service Required' is displayed in the message center.

This message takes priority over the distance to service calculation. This is applicable to diesel models due to oil dilution during the Diesel Particulate Filter (DPF) regeneration process under certain operating conditions.

The ECM service interval counter is reset by the dealer when the service has been completed using an approved Land Rover diagnostic system.

OPERATION

The information and messages which can be displayed in the Instrument Cluster (IC) are mainly generated from other system control modules. When a system control module detects a change or a fault which is tagged to generate a message, an electronic signal is sent via the Medium or High Speed (HS) (Controller Area Network (CAN) buses to the IC, which displays the message. If more than one message is requested the IC displays them in order of priority.

Information and Message CenterInformation and Message Center / Diagnosis and Testing

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