Head-Up Display (HUD): Components: Notes

The HUD system is comprised of the following components:

• Head-up Display unit
• Windshield
• HUD Switch

The following components are networked together for Head-up display functions:

• Light Module (LM)  - The light module controls and monitors all vehicle lights. Information is received and transmitted via the K-CAN.

  The LM provides the terminal 58g signal via K-CAN. The LM also transmits the dimmer signal to the HUD.

• Safety and Gateway Module (SGM)  - The SGM provides the gateway between the relevant bus systems for HUD operation. The SGM also provides the means for diagnosis via the D-Bus/SGM pathway.
• Digital Motor Electronics (DME)  - The HUD receives signals from DME regarding cruise control or ACC. The signals are provided via the K-CAN and PT-CAN.
• Car Access System (CAS)  - The CAS provides inputs relating to terminal status, the HUD is operational when KL15 is switched ON.
• Rain/Light Sensor (RLS)  - The RLS has been slightly modified to ensure optimal ambient brightness of the virtual image. The viewing angle of the RLS has been altered to view the area closer to the virtual image. This allows the ambient light near the virtual image to be monitored. This information is provided to HUD via the K-CAN.
• Instrument Cluster  - The instrument cluster provides vehicle road speed and check control messages via the K-CAN.
• Cruise Control/Active Cruise Control  - The cruise control or ACC sends the selected driving speed (set speed), distance (ACC), object detection (ACC), regulation display (ACC), and the transfer prompt (ACC) via the K-CAN.
• Steering Column Switch Cluster (SZL)  - The SZL sends the Cruise Control or ACC requests from the stalk switch via the byteflight /SGM/K-CAN pathway to the HUD.
• M-ASK/CCC  - The navigation information is sent to the HUD. This includes the next road, driving direction arrow, distance to intersection and the bar gauge. These signals are sent via the MOST bus pathway.