Instantaneous Fuel Economy

The Instantaneous Fuel Economy (IFE) may be displayed on the DID by pressing the FUEL button into the display reads one of the following messages:
^ Fuel Economy Inst MPG
^ Fuel Economy Inst L/100 km

Instantaneous Fuel Economy (IFE) is based on the previous few seconds of driving as in the following calculation. The calculation for Instantaneous Fuel Economy is IFE = Distance/Fuel Used x Scale Factor.

The Powertrain Control Module (PCM) sends the fuel data. The distance is determined from the discrete vehicle speed input to the instrument cluster. This parameter may not 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 following components are not communicating:
^ The serial data line
^ An interacting module