Driver Information Display (DID)

The Driver Information Display (DID) 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/TURN ajar. LOW WASH, LOW TIRE, LOW TRACE, TRACE 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 Derivable 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 derivable 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 Powertrain Control Module (PCM) communications.

OIL LIFE
The instrument cluster shall read oil life from the serial data line. The instrument cluster shall display a number received from the Powertrain Control Module (PCM) in percentages. When 0% oil life is reached, the instrument cluster shall extinguish the % units and display the word LOW. If the oil life mode was not selected by the driver upon entering the low oil life mode, then the instrument cluster shall override the mode being displayed and select the oil life mode. The driver may, however, override the low oil life mode by selecting another mode. If the ignition is cycled, the instrument cluster shall re-enter it as if it calculated it for the first time. The RESET button will transmit (while in oil life mode) the reset signal back to the PCM via the class II serial data line.

BOOST
The BOOST indicator will illuminate because information sent along the serial data line circuit 800. The graphics BOOST and Light Span will always be LH with the engine running. The gradations represent 0.6 PSI of boost and shall be lit if the pressure is equal to or greater than the gradient level. The BOOST will only be available with the 3.8 litter VIN 1(supercharged) engines.