Convenience electronics
Control unit for head-up display J898
The hardware of control unit for head-up display J898 is taken from the Porsche Taycan. Useful information is projected into the
driver’s field of vision in full colour. The projection is such that the information appears to be approximately 3 metres ahead of the
driver.
On the Audi e-tron GT (type F8), the networking is based on the MLBevo2 platform. This means that, as on other models that use
the platform, the head-up display on the Audi e-tron GT (type F8) communicates with the other control units in the vehicle via the
instrument cluster CAN data bus. Larger volumes of data are transmitted via the Ethernet cable, which is a single twisted-pair cop-
per cable.
The Ethernet connection is used to transmit navigation data such as the bar graph views or the detailed intersection map.
The display is divided into the main area, the status area and an area for temporary content. The content shown is specific to the
Audi e-tron GT (type F8), but there are strong similarities to the content displayed on an Audi A6 or Audi A8.
Unlike control unit in dash panel insert J285, control unit for head-up display is not a node of the component protection system. It
can be accessed via diagnostic address 0082 on the vehicle diagnostic tester.
There will not be a calibration board for adjusting the eye box in the workshop, as all the necessary adjustments (e.g. changes in
height or corrections to the angle of the image) can be made by changing the settings in an MMI menu.
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