Message
Other Warnings
Reason
Action
Description and Operation).
AUXILIARY HEATER
UNAVAILABLE LOW FUEL
(vehicles from 2009MY
with Fuel Fired Booster
Heater (FFBH))
None
Fuel level in fuel tank is at or below
threshold when FFBH 'ON' request is made.
Replenish fuel in fuel tank
AUXILIARY HEATER
UNAVAILABLE LOW
BATTERY (Vehicles from
2009MY with FFBH)
None
Battery voltage is below threshold when
FFBH 'ON' request is made.
Investigate reason for low
battery voltage. Follow the
procedures in the Battery
Care Manual to establish
the condition of the
battery.
TRIP COMPUTER
Trip computer information is shown in the bottom half of the message center when the screen is in display mode 3.
Trip Meter
A microprocessor in the instrument cluster calculates the trip data based on a wheel speed signal broadcast by the
Anti-lock Brake System (ABS) module over the high speed CAN bus. The CJB acts as a gateway and transmits the wheel
speed signal to the instrument cluster over the medium speed CAN bus.
The trip meter displays the distance the vehicle has traveled since the last trip meter reset. The trip meter can be reset by
pressing and holding the trip computer button for more than 1 second. The trip meter can display up to a distance of 999.9
miles or kilometers. W hen this figure is exceeded the trip meter starts again from 0 miles or kilometers.
The trip data is stored in the instrument cluster Random Access Memory (RAM) and will be lost if the battery is
disconnected.
Average Fuel Consumption
The instrument cluster receives 2 fuel tank level readings on the medium speed CAN bus via the CJB. The instrument
cluster calculates an average value of the amount of usable fuel in the tank from the 2 signals. Every 200 meters of
vehicle travel the instrument cluster re-calculates this value to determine how much fuel has been used. This value is then
averaged over the last 31 miles (50 kilometers) of travel and displayed in the trip computer.
The distance traveled signal originates in the ABS module and is received by the instrument cluster over the medium
speed CAN bus via the CJB.
Range
The range value is calculated using the average fuel consumption value (see above) and the fuel tank level value. By
dividing the fuel tank level value by the average fuel consumption value the instrument cluster can calculate the distance
the vehicle can travel with the current amount of usable fuel in the tank before refilling is necessary.
Average Speed
The average speed signal is calculated using the vehicle speed signal supplied by the CJB over the medium speed CAN
bus. This signal originates in the ABS module and is an average of the 4 wheel speed signals. This value is divided by the
time since the last trip computer reset to calculate the average vehicle speed.
ODOMETER
The odometer is located in the speedometer and displays the total distance the vehicle has traveled. This is calculated
using the same signal as that used for the trip meter.
The odometer display can show 6 characters and distances up to 999,999 miles or kilometers. The value is stored in a
protected area of the instrument clusters Electronically Erasable Programmable Read Only Memory (EEPROM) every 1.2
miles (2 kilometers) of vehicle travel. W hen the ignition is switched off, back up odometer values are also stored in the
following modules:
CJB
ABS module
ECM
Restraints Control Module (RCM)
Driver door module
Passenger door module.
The odometer values in these modules are sent to the instrument cluster over the medium speed CAN bus within the first
2 seconds of the vehicle entering power mode 6. If the values received are the same, the cluster determines the odometer
value has not been tampered with. If any value is outside of a 186 mile (300 kilometer) window the instrument cluster
stores a Diagnostic Trouble Code (DTC) and will display the majority value. The DTC can be retrieved using the Land Rover
approved diagnostic system.
Vehicle Operating Modes
The vehicle has 4 operating modes, which allow certain features to be enabled and disabled:
Normal (nor)
Factory (fact)
Transport (transp)
Crash (crash)