High Beam Indicator

The High Beam indicator (blue) display is a distributed function between the Body Function Controller (BFC) and the Instrument Cluster. The Body Function Controller (BFC) reads the High Beam Bulb voltage, and divides by the system voltage to determine a percent value. This value is compared against a calibration to determine if the High Beams are ON. The Body Function Controller (BFC) then transmits the status of the High Beams to the Instrument Cluster via the Serial Peripheral Interface (SPI) serial data bus. The Instrument Cluster then commands the High Beam indicator accordingly.