Video Switch

Video Switch

Video switch
The video switch (VSW) connects the connected video sources (e.g. video module, DVD changer, all-round vision camera, etc.) with the video sink (headunit and/or rear seat entertainment system).
Depending on user requirements, the image data are displayed via the video sinks in the display (Car Access Display and/or rear monitors).
The video switch has 5 inputs for video sources and 3 outputs for video sinks.

Functional description
The various video sources and video sinks are connected to the respective inputs and outputs on the video switch via CVBS lines.
The image information is transmitted via CVBS signals (Colour Video Blanking Signal). The Colour Video Blanking Signal (CVBS) transmits colour and brightness components and synchronization pulses via the differential signal line (CVBS+, CVBS-) to the video switch.
The video switch is activated by the video sinks (headunit and/or rear seat entertainment system) via the K-CAN. The video switch converts the CAN message to a corresponding switching signal and establishes the connection between the desired video source and the requesting video sink.







Structure and inner circuit
The video switch (VSW) is connected to the K-CAN and vehicle electrical system by means of a 54-pin plug connection.
The video switch transmits the picture signals of the selected video source to the requesting video sinks via CVBS lines.
The power distribution box in the junction box supplies the video switch via terminal 30B.







Pin assignments
The graphic above shows 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 nominal values for the video switch (VSW):

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

Diagnosis instructions

Failure of the component
If the communication to the video switch fails, run the standard checks (global testing procedure). If there is an internal control unit fault, the following behavior is to be expected:
- Fault entry in the video switch (VSW)

No liability can be accepted for printing or other errors. Subject to changes of a technical nature