On-Board Monitor and Mark II Navigation System Interface

ON-BOARD MONITOR AND NAVIGATION SYSTEM INTERFACE




- The I-Bus is the main communication link.
- The video module of the Mark I system is not used with the Mark II system in the US market (reduced cost, simplified system, faster operation).
- The Mark II nav computer communicates directly on the I-Bus (ARCNET not used). It generates the RGB video signals and sends them to the On-Board Monitor LCD. It also provides improved quality audio signals directly to the amplifier for navigation specific audio instructions ("right turn ahead").
- The Mark II nav computer receives two wheel speed sensor signals from the DSC system for monitoring vehicle speed and distance covered.
- The Mark II nav computer incorporates an electronic gyro compass which takes the place of the magnetic field sensor of the previous system.

CHANGES TO THE BOARD MONITOR BASIC FUNCTIONS

At first glance the system looks and operates similar to the previous Mk-1 system. Only when looking further into the control settings and features is a change noticed.

Automatic Date/Time display:




When a door is opened the GM signals status of "door open" on the K bus. Via the I Bus, the IKE passes the signal onto the Nav computer which generates the RGB signals for display of the Date/Time on the bottom edge of the LCD.




The Set function of the opening menu provides additional owner customized settings for the board monitor display.

After selecting set from the main menu, scroll down to the bottom of the list, an additional three items are included:




- BC display: Provides selection of either the outside temperature or estimated arrival time of the set distance set in the board computer functions. These items are displayed along with the other BC functions when the Audio + BC is set function is "On".
- Color set: Provides three set variations of screen color schemes.
- Day/night: Provides a deviation of the selected color set when the headlights are switched on.

Though subtle, these changes provide added convenience and provide the owner the opportunity to slightly customize their vehicle's On-board monitor display.