Rear Display and Rear Display 2

Rear Display And Rear Display 2

Rear display and rear display 2
The rear displays are the display units of the RSE control unit (e.g. graphical display function for entertainment (music tracks, DVD menu), navigation, radio, air conditioning, communication etc.). The Rear Seat Entertainment is optional equipment.
Each rear display consists of a printed circuit board and a display module. The control unit function is integrated in the printed circuit board.
The rear displays are installed in the backrests of the front seats.

NOTICE: This component description only applies provided the rear displays are bus participants on the K-CAN and therefore control units.

Functional description
The switch on / switch off signals are sent to the rear displays by the RSE control unit. The RSE control unit outputs the message to switch on / switch off on the MOST. The central gateway module (ZGM) is the data interface between MOST and K-CAN. The message on the MOST is translated by the central gateway module on the K-CAN and provided to the rear displays.
Each FD control unit is connected to the RSE control unit by means of an LVDS data line (Low Voltage Differential Signalling). All image information is transferred across the LVDS data line from the RSE control unit. The image information is processed in the FD control units and displayed on the screen.
Due to the Black Panel technology, the instrument panel is always illuminated as of terminal R. A phototransistor is installed in the instrument panel to calculate the necessary brightness (display, indicator and warning lights, scales, needles).
The brightness value calculated in the instrument panel is output on the bus system (e.g. for the Central Information Display, rear displays). In the FD control units, the received brightness value is compared to the set brightness values. Darkening or brightening adapts the corresponding rear display to the surrounding brightness. This ensures good legibility of the display.
Infrared transmitters for the infrared transmission to the headphones are also built into the rear monitors. The infrared transmitters are directly connected to the RSE control unit.







Structure and inner electrical connection
The FD or FD2 control unit is connected to the vehicle electrical system by means of 2 plug connections.
The FD control units are bus users on the K-CAN.
The LVDS data line is used to transmit the image information from the RSE control unit to the rear monitors.
The 2 FD control units are supplied with terminal 30B by the rear power distribution box.












Pin assignments
The graphics above show only the supply and bus connection. The current pin assignment can be found on the BMW ISTA (Integrated Service Technical Application) diagnosis system among the wiring diagrams. Click on the component code in the wiring diagram to activate the "Installation location" and "Pin assignment" tabs.

Nominal values
Observe the following setpoint values for the control unit:

Size Value
Supply voltage 9 to 16 V
Temperature range -40 to 85 °C

Diagnosis instructions

Failure of the component
If the communication to the rear display and/or rear display 2 fails, run the standard tests (global testing procedure). If there is an internal control unit fault, the following behavior is to be expected:
- Fault entry in the FD control unit or FD2 control unit
If the LVDS data line fails, the screen lights up "orange" for approx. 30 seconds then goes "dark".

We can assume no liability for printing errors or inaccuracies in this document and reserve the right to introduce technical modifications at any time.