Range (Trip Calculator)

The range is calculated as the product of the average fuel economy (AFE) multiplied by the amount of fuel that is remaining in the tank (AFE times the fuel remaining). When a range of less than 40 miles is calculated, the low fuel range mode is entered, except during the first 10 miles following the AFE reset. During the first 10 miles, the low fuel range (LO FUEL message) will not be entered and the range of the values will be 0-999.

The numeric display will spell LO FUEL and extinguish the MI or km units during the low fuel range mode. After the low fuel range mode is first entered, the message will flash at a rate of 2 Hz for 60 seconds. The message will be displayed continuously after the initial 60 second period. If the range mode was not selected when the low fuel range mode was entered, the trip calculator overrides the mode that is displayed and selects the range mode. Select another mode in order to override the low fuel range mode. If the ignition is cycled the trip calculator will re-enter the mode selection as calculated the first time.

The fuel sender input is a voltage vs. gallons (fuel level) curve generated by a 40-250 Ohms variable sender that is located in the fuel tank and pulled up to the ignition in the powertrain control module (PCM). Then, the fuel is sent to the trip computer via the class II serial data line communications. The range algorithm must filter the fuel tank sender input over an average period of 2 minutes. Hysteresis is applied, if needed. The reset button is ineffective while the vehicle is the range mode. The range is reset by an AFE reset.