Special vehicle multifunction control unit (SVMCU [MSS]), component description - GF54.21-P-4010LEA

MODEL 221.0/1 with CODE (965) Electrical preinstallation, rental vehicles as of model year 2009/YoM 08 

Location 

The special vehicle multifunction control unit (SVMCU [MSS]) is at the rear right wheel arch.

Task 

The special vehicle multifunction control unit (MSS) has the following tasks:

• Reading in of sensors, pickups and signals 
• Evaluation of input factors 
• Actuation of components 

Reading in of sensors, pickups and signals 

The input factors are read in via the following connections:

• Direct line 
• Interior CAN (CAN B) 

Direct line 

The signals from the following components are read via a direct line:

• Two-way radio (A49) (accessories)
• Radio data transmission two-way radio (A49/5) (accessories)
• Emergency alarm system cancel button (S62/5) (with code (934) Taxi emergency alarm system)
• Emergency alarm system activation button (S62/6) (with code (934) Taxi emergency alarm system)

Interior CAN 

The signals are read in by the special vehicle multifunction control unit (MSS) via the interior CAN. The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Evaluation of input factors 

The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.

Actuation of components 

The actuation of the components takes place via the following connections:

• Direct line 
• Interior CAN 

Direct line 

The following components are actuated via a direct line:

• Two-way radio (accessories)
• Radio data transmission two-way radio (accessories)
• Taximeter (A50) (with code (336) Preinstallation for taximeter installation)
• Taximeter control unit (A67n1) (with code (337) Taximeter integrated in rearview mirror)
• Roof sign lamp (E14/4) (with code (342) Roof sign lamp connection for taxi)

Interior CAN 

The signals are transmitted by the special vehicle multifunction control unit (MSS) via the interior CAN.

The resulting functions are described in the respective function descriptions (see block diagram or function schematic).

Wiring diagram of special vehicle multifunction control unit (SVMCU [MSS])

PE54.21-P-2105-97SAA