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Reversing camera (RFK), function - GF54.65-P-0005FL

MODEL 212.0/2 up to 28.2.13 with CODE (218) Backup camera except CODE (498) Japan version 

Function requirements, general 

IMPORTANT The electronic ignition lock control unit transmits circuit status of circuit 15 (N73) via the interior CAN (CAN B) to the rear SAM control unit with fuse and relay module (N10/2).

Reversing camera, general 

The reversing camera system assists the driver when reverse parking and when backing up.

Reversing camera function sequence 

When the reverse gear or gear range "R" is engaged the reversing camera (B84/3) is powered by the reversing camera power supply module (N66/10). Actuation of the reversing camera power supply module takes place over the rear SAM control unit as soon as this actuates the left backup lamp (E3e3) and the right back up lamp (E4e3).

IMPORTANT The "reverse gear engaged" status is defined as follows:

Vehicles with transmission 711, 716:

Reverse gear engagement is detected via the status of the backup lamp switch (S16/2), which is read in directly by the front SAM control unit with fuse and relay module (N10/1).

Vehicles with transmission 722.6:

The request to engage gear range "R" is defined by the corresponding selector lever position.

The electronic selector lever module control unit (N15/5) sends the status of the selector lever position to the front SAM control unit via the drive train CAN (CAN C), CDI control unit (N3/9) (with diesel engine) or ME-SFI [ME] control unit (N3/10) (with gasoline engine) and chassis CAN (CAN E).

Vehicles with transmission 722.9:

Gear range "R" is engaged through the fully integrated transmission control unit (Y3/8n4). The fully integrated transmission control unit then sends the status "gear range R engaged" to the front SAM control unit via the drive train CAN, CDI control unit or ME-SFI [ME] control unit and chassis CAN.

Located in the front SAM control unit are two microprocessors, one for control of basic functions e.g. the exterior lights, and the second for control of the central gateway functions. Both processors communicate with each other internally via interior CAN. Using all incoming information, the microprocessor which controls the central gateway functions generates the "reverse gear engaged" signal (irrespective of the transmission variant) and sends this signal to the rear SAM control unit via the interior CAN.

The rear SAM control unit then actuates the reversing camera power supply module, which supplies power to the reversing camera.

The pictures taken by the reversing camera are sent as a Composite Video Baseband Signal (CVBS) over the reversing camera power supply module to the COMAND controller unit.

The COMAND controller unit then activates the Audio/COMAND display (A40/8) over the telematics CAN (CAN A).

The pictures taken from the reversing camera are then sent directly via the low voltage differential signal (LVDS) line to the Audio/COMAND display and output there.

  Reversing camera (RFK), location of components   GF54.65-P-0005-01FL 
REFER TO SYSTEM WIRING DIAGRAMS Electrical function schematic, reversing camera   PE54.65-P-2051-97DAA
  Reversing camera (RFK), block diagram   GF54.65-P-0005-02FL 
  Reversing camera, (RFK), overview of system components   GF54.65-P-9997FL 
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