Fuel Gauge

Fuel level data is broadcasted from the Powertrain Control Module (PCM) via the class II serial data line to the instrument cluster. The instrument cluster will then compare the fuel data with a sixteen-point look-up table to determine needle deflection. A smooth filter is used to secure a continuous response. The instrument cluster will determine if a low fuel condition is present. In the event of a low fuel condition, the instrument cluster shall activate the LOW FUEL indicator and send a chime message to the Body Control Module (BCM). In the event the fuel level data is lost or the PCM is in a state of health fault, the instrument cluster will drive the fuel gauge to E (empty).