L322 Range Rover Instruments - Description and Operation
INSTRUMENTS
88-30
DESCRIPTION AND OPERATION
Test function No. 20 – Entry of Correction Factor for Fuel Consumption
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This function is locked and needs to be unlocked via the procedure in Function Test No. 19. This function allows
for the query and alteration of a correction factor for fuel consumption values. Display and entry of the correction
value is a decimal form per thousand.
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'KVBR: 0980' – this shows a correction factor of 980.
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Entry of the correction factor is in the range of 750 to 1250. On production, the correction factor of 1000,
corresponding to 1.000, is programmed into the EEPROM.
Adjustment of the correction factor is possible using the trip reset button. Each press of the button decreases the
factor by 1. When the minimum of 750 is reached, the display reverts to the maximum of 1250. If the trip reset
button is pressed and held, the value is decreased in increments of 10 to shorten the setting time. When the
desired correction value is reached, entry is achieved by pressing the check control button. The display moves
to test function No. 21.
The new correction value is calculated from the actual average fuel consumption value and the currently
displayed correction factor. The average fuel consumption is calculated by filling the fuel tank at a pump and
dividing the litres used by the distance travelled on the fuel used. The correction factor must relate to units of L/
100km.
The following formula must be used to calculate the correction value, where X = calculated fuel consumption, Y
= fuel consumption recorded by on-board computer, Z = currently displayed correction factor:
(X
÷
Y) x Z = New correction value.
Test Function No. 21 – Software Reset
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This function is locked and needs to be unlocked via the procedure in Function Test No. 19. This function
activates a reset of the software by the processor. This can also be performed using TestBook/T4.
When function 21 is entered the display shows 'RESET?'. If the trip reset button is depressed the system reset
will be performed. If reset is not required, exit the test function by pressing the check control button or turning the
ignition off.
