On-Board Computer
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 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 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 releases the message center for trip display. This will only occur if the LCM is not displaying any high priority messages at the time. The LCM 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 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, 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.
On-Board Computer Functions with Touch Screen Display
The on-board computer functions are accessed on the TSD by pressing the 'On-Road Information button' on the left hand side of the TSD. After pressing this button the last displayed screen in the on-road information selection appears in the TSD. The following screens are available in the on-road information screen:
^ FUEL AND TEMPERATURE Fuel Consumption 1 Fuel Consumption 2 Tank Range External Temperature
^ Fuel Consumption 1
^ Fuel Consumption 2
^ Tank Range
^ External Temperature
^ SPEED Speed Warning Average Speed
^ Speed Warning
^ Average Speed
^ STOPWATCH Stopwatch and Lap Timer
^ Stopwatch and Lap Timer
^ TRIP SETTINGS Selections for message center display.
^ Selections for message center display.
Each of the screens have four buttons along the bottom of the screen which allow the user to change screens.
Fuel and Temperature Screen
The Fuel and Temperature screen shows the figures recorded against the fuel consumption 1 and 2, the remaining distance calculated from the fuel tank level (tank range) and the external temperature.
The two fuel consumption readings allow the driver to set fuel consumption for different journeys, e.g. fuel consumption 1 can be reset at the start of each journey and fuel consumption 2 can be reset when the tank is refilled. A 'Reset' button is located to the right of each fuel consumption figure and allows the figure to be reset to zero.
The 'Tank Range' and 'External Temp' are displayed but cannot be reset or adjusted.
Speed Screen
The Speed screen shows the average speed attained since the last reset and also allows the driver to enable and set the speed warning.
The speed warning can display 'Off' if it is not active or the set speed. A 'Set' button, located to the right of the speed warning, when pressed enters the speed warning screen.
NOTE: On vehicles with a navigation system fitted, the 'Arrival Time' and 'Distance' selections are not visible.
Speed Warning Screen
The speed warning screen allows the driver to disable or activate the speed warning. The set speed can be adjusted by pressing the up or down arrows to increase or decrease the required speed. Once set, the screen returns to the 'Speed' screen which then displays the selected speed or 'Off' if the warning was deselected.
Stopwatch Screen
The Stopwatch screen allows the driver to record a journey time. The stopwatch records hours, minutes, seconds and tenths of seconds and can be started and stopped using a button below the readout.
The stopwatch also incorporates a lap timer which allows the driver to record a split time at a certain point in the journey. A 'Reset' button allows the stopwatch and lap timer to be reset to zero. The stopwatch cannot be displayed in the message center.
Trip Settings Screen
The trip settings screen allows the driver to select the trip information which is displayed in the message center. If none of the settings are selected then all trip information is displayed. If one or more are selected then only those are displayed.
Once the selections are made they can be saved by pressing the 'OK' button. The screen then changes back to the previously displayed on-road information screen.
NOTE:
^ The stopwatch is not available as a selection and therefore cannot be displayed in the message center.
^ On vehicles with a navigation system fitted, the 'Arrival Time' and 'Distance' selections are not visible.