Circuit/System Description

The head up display (HUD) is a secondary display system capable of reflecting important vehicle information onto the windshield. The vehicle information is displayed using virtual imaging and is reflected off the windshield in front of the driver. Battery positive voltage is the main power source for the HUD system. However, the HUD system can only be enabled when the ignition is active and in the RUN position. The HUD system receives all vehicle information to be displayed via the class 2 serial data circuit. The HUD system interfaces with the HUD switch via discreet circuits. The HUD switch is a normally open switch and ground is provided from within the HUD switch when any switch press occurs.