Fuel Distance/Mileage Module: Description and Operation

The fuel computer calculates and displays:
- Trip distance.
- Instant economy.
- Average economy.
- Distance to empty.
- Average speed.

The fuel computer goes through prove-out when powered up and then goes into normal mode by displaying the function selected before the last ignition switch turn off. All menu functions remain illuminated for about five seconds following prove-out and the pointer preceding the selected function is also illuminated. After five seconds, the non-selected functions will not be displayed. If the instrument cluster memory has been reset by interrupting battery positive voltage (B+) power to the instrument cluster, the default display is TRIP DISTANCE.

INSTANT ECONOMY
INSTANT ECONOMY is the fuel economy calculated at that instant.
- The instantaneous fuel economy value is displayed along with the L/100km or MILES/GAL logo.
- The range of instantaneous fuel economy which can be displayed is from 99 to 0 L/100 km or from 0 to 99 MILES/GAL.
- When the vehicle is not moving, instantaneous fuel economy is displayed as 99.9 to 0.0 L/100 km or 0.0 to 99.9 MILES/GAL.
- INSTANT ECONOMY cannot be reset.

AVERAGE ECONOMY
AVERAGE ECONOMY is the fuel economy obtained since the average fuel economy function was last reset.
- The average fuel economy value is displayed along with the L/100km or MILES/GAL logo.
- The range of average fuel economy which can be displayed is from 99.9 to 0.0 L/100km (0.0 to 99.9 MILES/GAL).
- AVERAGE ECONOMY can be reset by pressing the RESET button while average fuel economy is displayed.
- A reset causes the current instantaneous fuel economy value to be displayed as the average fuel economy.
- This value is then updated according to continuing changes in vehicle speed and fuel consumption.

DISTANCE TO EMPTY
DISTANCE TO EMPTY is the distance that can be travelled before the fuel tank becomes empty.
- The distance to empty value is displayed in whole kilometers or miles along with the km or MILES logo.
- The range of distance to empty which can be displayed is from 0 to 1999 kilometers or miles.
- DISTANCE TO EMPTY cannot be reset.
- At 80 kms (50 miles) to empty, the fuel computer selects the distance to empty function, provides a one second audible tone, and flashes the distance to empty value for approximately five seconds.
- The display continues to indicate DISTANCE TO EMPTY (not flashing) until another function is selected.
- This alert will be displayed again at 40 kms (25 miles), at 20 kms (10 miles) to empty and at every subsequent power up below 80 kms (50 miles) to empty.

TRIP DISTANCE
Trip distance is the distance travelled in tenths of kilometers or miles up to 199.0 (whole numbers above 199.9) since the trip distance was last reset.
- The value is displayed with leading zeros suppressed.
- The value rolls over to 0.0 after 999 kilometers or miles.
- The appropriate km or MILES logo is displayed when TRIP DISTANCE is selected.
- TRIP DISTANCE can be reset to 0.0 by pressing the RESET button while TRIP DISTANCE is selected.

AVERAGE SPEED
AVERAGE SPEED is the average speed of the vehicle since the AVERAGE SPEED function was last reset.
- The average speed value is displayed in mph or kph.
- The range of average speed which can be displayed is from 0 to 199 in whole units.
- AVERAGE SPEED can be reset by pressing the RESET button while AVERAGE SPEED is displayed.