Driver Information Center (DIC)

The Driver information Center (DIC) shall calculate and display the following vehicle parameters: Average Fuel Economy, Instantaneous Economy. Oil Life and Range. Only one of the above parameters will be displayed at a time. The mode indicator next to the corresponding graphics will be lighted. The user can change the parameter displayed by depressing the mode button located on the driver information display switches. The operator can change the display units from English to metric by pressing the E/M button on the face of the driver information display switches. The display is vacuum fluorescent with 6 characters, and 7 segment with parameter units.

Other information such as the DOOR AJAR, TRUNK AJAR, LOW WASH, LOW TIRE, LOW TRAC, TRAC OFF, and CHANGE OIL SOON are delivered to the driver through the telltale lamps or indicators. The telltale lamps or indicators will be illuminated when either a grounding switch is closed or one of the pertinent modules provides a path to ground for that indicator.

Average Fuel Economy
The Average Fuel Economy (AVG) can be displayed on the Driver information Display (DID) by pressing the FUEL button until the display reads Fuel Economy Average MPG or Fuel Economy AVG L/100km.

The value for Average Fuel Economy will be reset when Average Fuel Economy is displayed on the DID and the RESET button is pushed. Average Fuel Economy (AFE) is computed:

^ AFE = (Trip Distance)/(Trip Fuel Used) x Scale Factor

Where Trip Distance is the distance traveled or fuel used since the last reset. Fuel used data is received from the PCM and Trip Distance is received by the dedicated vehicle speed input.

Instantaneous Fuel Economy (IFE)
The Instantaneous Fuel Economy can be displayed on the DID by pressing the FUEL button until the display reads Fuel Economy Inst. MPG or Fuel Economy Inst. L/100km.

Instantaneous Fuel Economy (IFE) is based on the previous few seconds of driving as follows:

^ IFE = Distance Fuel Used x Scale Factor

Fuel data is received from the Powertrain Control Module (PCM). Distance is determined from the discrete vehicle speed input to the instrument cluster. This parameter cannot be reset by the driver. This portion of the instrument cluster will be dashed if there is a loss of PCM communications.

The instrument cluster will dash the displays if the serial data line or an interacting module are not communicating.


Range
Vehicle range is displayed as an estimate of expected remaining driving distance with current fuel level. Driving range is based on the fuel in the tank and fuel economy of the last 25 miles. Because of the required predictions, displayed range and actual range may vary. When calculated range falls below 40 miles, the range display will read LOW. Vehicle Range is calculated by the instrument cluster as described below.

^ Estimated Driveable Range = Distance Traveled/Fuel Used x Scale Factor x Filtered Fuel in Tank

This calculation is based on the last 25 miles driven and is an estimate of the driveable range. This calculation cannot be reset by the driver. The data used to calculate range is lost if the battery is disconnected. This portion of the instrument cluster will be dashed if there is a loss of power to the PCM communications.