Information and Message Center
Information and Message Center
Information And Message Displays
General
The instrument cluster has two separate LCD (liquid crystal display) 's which show the following data:
^ Odometer - Displays the total vehicle distance traveled
^ Trip meter - Displays the total vehicle distance traveled since last reset
^ Ambient temperature - Displays the external ambient temperature in degrees C or degrees F
^ Message center - Displays system information to the driver.
The LCD (liquid crystal display) is an integral part of the instrument cluster. The LCD (liquid crystal display) comprises black segments on a grey background or green illuminated when the lighting control switch is in the side lamp or headlamp position. The LCD (liquid crystal display) is illuminated by backlighting which is provided by LED (light emitting diode) 's.
The backlighting has a manual brightness control. The manual brightness control is only available when the lighting control switch is on and is operated using the illumination dimmer rheostat on the lighting control switch. The automatic brightness adjustment is controlled by the instrument cluster processor from a sensor located in the Touch Screen Display (TSD).
Odometer
The odometer displays the total distance which the vehicle has traveled. This is calculated by the processor using the wheel speed signals received from the ABS (anti-lock brake system) module. The total mileage information is made available to other systems on the I and K Buses and is only transmitted in kilometers, irrespective of market configuration.
The odometer display can show distances traveled up to 999,999 miles or kilometers. When the ignition is off, pressing the left hand instrument cluster button, will allow the odometer reading to be displayed for approximately 25 seconds.
The total distance is also recorded in the instrument cluster EPROM (erasable programmable read only memory) and RAM (random access memory). This is recorded after every 2 kilometers traveled and transmitted to the LCM (lighting control module) at every ignition off cycle. The LCM (lighting control module) stores this information in 100 kilometer intervals and the discrepancy between the instrument cluster and the LCM (lighting control module) cannot exceed 2000 kilometers. This data is stored and compared to that in the instrument cluster to protect against illegal alteration of the odometer readings.
Trip Meter
The trip meter displays the total distance which the vehicle has traveled since the last trip meter reset, up to 999.9 miles or kilometers. This is calculated by the processor using the wheel speed signals from the ABS (anti-lock brake system) module and is stored in the instrument cluster RAM (random access memory). The trip meter will restart at zero if the total distance exceeds 999.9 miles or kilometers.
The trip meter LCD (liquid crystal display) also contains a small dot, known as the manipulation point. The manipulation point shows if there is a total distance traveled or other data discrepancy between the instrument cluster and LCM (lighting control module). Refer to 'Redundant Data' for further details of information storage.
Ambient Temperature
The external ambient air temperature is measured by a sensor located behind the Land Rover badge on the front grille and is connected directly to the instrument cluster.
The ambient temperature sensor is an NTC (negative temperature coefficient) sensor whose resistance falls as the ambient temperature increases. The instrument cluster outputs a reference voltage of 5.1 V to the sensor. The instrument cluster processor evaluates the returned signal and converts the information into a temperature value and displays the appropriate temperature in the message center. The temperature display can be adjusted by using the Land Rover approved diagnostic system to display in either Celsius or Fahrenheit, dependent on market requirements. This can also be changed by the driver using the 'Settings' screen in the TSD.
The instrument cluster continuously transmits the ambient temperature signals on the CAN (controller area network) for use by other systems, when the ignition is on. When the vehicle is stationary, the signal output is suspended until the vehicle speed reaches 12 mph (20 km/h) to prevent incorrect readings from heat emitted from the engine compartment. When the ignition is off there is no temperature output.
The sensor is capable of reading temperatures in the range of -45 degrees C (-49 degrees F) to +56 degrees C (+132.8 degrees F). The instrument cluster message center will display minimum temperatures to -40 degrees C (-40 degrees F) and maximum temperatures to +50 degrees C (+122 degrees F).
If the temperature falls to 4 degrees C (39.2 degrees F) or below, the instrument cluster generates a message when the ignition is on. The instrument cluster displays the message, 'EXTERNAL TEMPERATURE', with the recorded temperature alongside. The instrument cluster also emits a single chime from the sounder to alert the driver to the warning message. The display time of the message is between 6 and 15 seconds, dependant on other displayed messages.
Message Center
The message center is located at the bottom of the instrument cluster. The message center comprises an LCD (liquid crystal display), which has two, 20 character text displays. The majority of messages are generated by the LCM (lighting control module) 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.
A check control button is located between the tachometer and the ECT (engine coolant temperature) gauge. This button allows the driver to view system status messages which are current in the instrument cluster RAM (random access memory). Pressing and releasing the check control button, displays current messages in priority order or, if no messages are present, the message center displays 'CHECK CONTROL OK'.
The messages are assigned priorities, depending on the effect on driving safety and driving ability of the vehicle. New messages are displayed and accompanied by a chime from the sounder. Messages are divided into priority groups P1, P2 and P3. The priority groups are as follows:
^ Priority Group P1 - This group includes messages which have a direct affect on the driving ability and safety of the vehicle, 'STOP! ENGINE OIL PRESS' for example. This message requires an urgent and immediate reaction from the driver in response to the message. P1 messages are also accompanied by appropriate flashing warning indicator symbols adjacent to the message center. If more than one P1 message is present, each message is displayed in turn at 3 second intervals.
^ Priority Group P2 - This group includes messages which do not directly affect driving ability or safety of the vehicle, 'CHECK NUMPLATE LIGHT' for example. This message must be noted by the driver and the cause rectified as soon as possible. Each message is indicated once for a maximum of 23 seconds. They can be recalled by pressing the check control, RH (right-hand), button on the instrument cluster.
^ Priority Group P3 - This group displays messages which relate to fluid levels, 'LOW SCREEN WASH' for example. Depending on the message, some messages are only displayed at the end of a journey, to avoid irritation to the driver.
Two other groups are defined as 'End of Journey Messages' and 'Special Messages S and S1', as follows:
^ End of Journey Messages - Messages categorized as 'P1' and 'P2' error messages, are displayed again at the end of the journey. Error messages do not include messages such as 'DOOR OPEN'. Messages in the 'P3' group are displayed after the 'P1' and 'P2' messages. New messages, which only occur at the end of a journey, 'LIGHTS ON' for example, are displayed according to their priority.
^ Special Messages S and S1 - These messages have the highest priority and cannot be overridden by messages in groups 'P1', 'P2' and 'P3'. They immediately overwrite any currently displayed messages. If more than one special message is present, the message with the highest priority has priority, after the current displayed message has been shown for at least 1 second. S and S1 messages are not displayed between any symbols.
Most messages, especially S, S1 and P messages are accompanied by a chime from the sounder to alert the driver to their presence. At the end of a journey, a single chime precedes all end of journey messages.
For 3 minutes after the ignition is switched off, messages can be displayed using the check control RH (right-hand) button on the instrument cluster. If more than one message is present, the button must be pressed again to display the next message. If no messages are present, 'CHECK CONTROL OK' will be displayed for as long as the button is pressed.
The messages are displayed in a language applicable to the vehicle market configuration and can be changed using the Land Rover approved diagnostic system. The following list shows the possible messages which can be displayed.
Gear Position Display
The gear position display is controlled by the TCM (transmission control module). The gear position is illuminated in response to CAN (controller area network) bus messages from the TCM (transmission control module).
The instrument cluster has no control over the gear position display, but monitors the controlling CAN (controller area network) bus messages. If the instrument cluster detects ten incorrect CAN (controller area network) bus messages, 'TRANS. FAILSAFE PROG' is illuminated in the message center. If a correct CAN (controller area network) bus message is received when the ignition is next switched on to position II, the error is erased and the message removed.
Service Interval Indicator
The Service Interval Indicator (SIA) is displayed in the message center. The SIA displays information calculated by the instrument cluster to calculate the remaining distance to the next service based on the amount of fuel used since the last SIA reset. It can also calculate the remaining time until the next service is required.
For the fuel based remaining distance, the message center displays 'OILSERVICE 1000MLS (KMS)'. The SIA will not display more than 1000 miles or kilometers and will count down, with a reduction in distance remaining as the vehicle is used. A vehicle which is driven aggressively will require a service more often than a vehicle which is driven economically.
For the time based period to next service, the message center displays 'INSPECTION 05.2005'. The instrument cluster calculates the remaining time between services based on the last SIA reset. If the vehicle has not used enough fuel to display the fuel based oil service, the time based inspection service will be displayed.
NOTE: Japan and NAS markets do not have the time based SIA display. SIA is calculated only on the fuel consumption in these markets.
The service information is displayed for 5 seconds at each ignition on cycle. A minus sign is displayed alongside the SIA information if the distance or time has been exceeded and the distance or time by which it has been exceeded.
The SIA information is stored in the instrument cluster EPROM (erasable programmable read only memory) and can only be reset using the Land Rover approved diagnostic system.
On-board Computer
The instrument cluster contains software to enable the operation of an on-board computer. The on-board computer functions can be displayed in the instrument cluster message center or on the Touch Screen Display (TSD).
The following on-board computer functions are available:
^ Time of day
^ Date
^ Average fuel consumption (CONSUMPTION 1 & 2)
^ Ambient temperature
^ Anticipated fuel tank range
^ Average speed
^ Speed warning
^ Stopwatch
^ Message center trip function display preferences.
The on-board computer functions can be displayed in the instrument cluster message center alone or in the TSD and the message center simultaneously.
Computer Controls
On the TSD, the on-board computer functions are selected by pressing the on-road information button. The computer functions can also be displayed in the message center by pressing the 'I' button on the LH (left-hand) steering column multifunction switch.
The instrument cluster message center shows all the selected computer function messages in a scrolling display. The information displays can be scrolled through using the information (I) button on the LH (left-hand) steering column multifunction switch.
NOTE: Not all of the available trip computer functions can be displayed in the message center.
When the on-board computer is being accessed via the TSD, the TSD communicates with the instrument cluster to display the trip information in the TSD only. The TSD also allows for the resetting and programming of certain on-board computer functions, such as the speed limit, message center information display preferences and stop watch.
The on-board computer system of the instrument cluster supplies the TSD with data and commands on the I Bus.
Selections on the TSD are passed to the instrument cluster software for calculation of the text and numerical values to be displayed. The TSD is purely a user interface with regard to the on-board computer, with the instrument cluster being the controlling component.
The TSD has one exception to this. Using data supplied by the instrument cluster, the TSD self generates the text messages which appear on the LCD screen.
The on-board computer trip information will only be displayed if the LCM (lighting control module) releases the message center for trip display. This will only occur if the LCM (lighting control module) is not displaying any high priority messages at the time. The LCM (lighting control module) registers the request for on-board computer trip display and, if there are no messages or the displayed message is of a low priority, the on-board computer trip information is permitted use of the message center.
On-Board Computer Functions with LH Steering Column Multifunction Switch
Pressing the on-board computer button (I) on the LH (left-hand) steering column multifunction switch displays the first selected trip display in the sequence. With each subsequent press of the button, the next trip information in the sequence is displayed. The displayed information can be programmed by the driver using the TSD and scrolled through continuously to reach the desired information. One or more of the available trip information selections can be displayed.
When all of the trip displays have been scrolled through once, the message center appears blank, signifying the end of the trip display. When the trip information is subsequently requested, the message center will display the first function in the sequence. If the function display is interrupted by a system message from the LCM (lighting control module), when the steering column multifunction switch button is pressed or the check control button is pressed, the last displayed trip information will reappear in the message center.
The following list shows the possible on-board computer trip information and their standard sequence of display. This order will be reinstated after a system reset.
^ TIME
^ DATE
^ CONSUMPTION 1
^ CONSUMPTION 2
^ TANK RANGE
^ SPEED WARNING
^ AVERAGE SPEED.