On-Board Computer: Notes

The instrument pack contains software to enable the operation of an on-board computer. The on-board computer functions can be displayed in the instrument pack message center, on a Multi-Information Display (MID) or a Multi-Function Display (MFD), depending on vehicle specification.

The following on-board computer functions are available:

Time of day
Date
Reminder signal (MEMO)
Ambient temperature (only displayed in the instrument pack LCD and the MFD)
Average speed
Anticipated fuel tank range
Input of distance between journey start and end points (only on MID and MFD) (DISTANCE)
Anticipated arrival time (ARRIVAL)
Average fuel consumption (CONSUMPTION 1 & 2)
Speed warning (LIMIT)
Stop watch (TIMER) or switching points for park heating/park ventilation (TIME 1 & 2)
Anti-theft protection (CODE).

The on-board computer functions can be displayed in the instrument pack alone or in the MID/MFD and the instrument pack simultaneously.

Fig 1: Locating MID, Information Button And Column Stalk Information Button

Courtesy of LAND ROVER NORTH AMERICA, INC.

Fig 2: Identifying Multi Function Display And Location

Courtesy of LAND ROVER NORTH AMERICA, INC.

The on-board computer functions are selected in the MID by pressing the 'i ' button for on-board computer functions or the clock symbol for clock timer functions. On the MFD, the on-board computer functions are selected from a menu on the LCD or by pressing the clock symbol for clock timer functions. The computer functions can be selected in the message center by pressing the 'i ' button on the LH column stalk switch.

The instrument pack message center shows all the possible computer function messages in a scrolling display. The function displays can be scrolled through using the on-board computer button (i ) on the LH column stalk switch. The column stalk button allows the resetting of certain functions in conjunction with the MID/MFD, and also the order in which the function displays are scrolled through. Four functions cannot be accessed using the column stalk button, they are; CODE, MEMO, EXTERNAL AIR TEMPERATURE and HEAT ON/OFF AIR ON/OFF. These functions are only available using the MID/MFD.

When the on-board computer is being accessed via the MID/MFD, these units communicate with the instrument pack message center to display the function information in the display in the MID/MFD only. The MID/MFD also allow for the resetting and programming of certain on-board computer functions, such as the clock, date, speed limit and stop watch.

The on-board computer system of the instrument pack supplies the MID/MFD with data and commands on the I Bus. Some computer functions require an exchange of data between the Automatic Temperature Control (ATC) ECU and the Body Control Unit (BCU) which is carried out on the K Bus.

Operation of the buttons on the MID or selections on the LCD screen of the MFD are passed to the instrument pack software for calculation of the text and numerical values to be displayed. The MID/MFD are purely a user interface with regard to the on-board computer, with the instrument pack being the controlling component.

The MFD has one exception to this. Using data supplied by the instrument pack, the MFD self generates the text messages which appear on the LCD screen.