Switch-On Response

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

The head-up display is partially operational when terminal R is switched ON. This means:

The projection display is initialised but information is not yet displayed.
The head-up display is able to communicate with other bus-elements via the MOST and K-CAN data buses.

The head-up display is operational when terminal 15 is switched ON. This means:

The light source is switched on when the button for switching the head-up display on and off is pressed.
The projection display cover panel is folded out of the beam by the stepper motor.
The automatic adaptation of the display brightness is activated.