GF54.21-P-4126RIT Vehicle Power Supply Control Unit, Component Description

GF54.21-P-4126RIT Vehicle power supply control unit, component description
- with CODE (P99) Special model "AMG Black Series"

Component Identification:

Location
The vehicle power supply control unit is located in the trunk upstream of the onboard electrical system battery.

Task
The vehicle power supply control unit has the following tasks:
^ Reading in of signals
^ Evaluation of input factors
^ Control of functions
^ Actuation of components

Reading in of signals
The input factors are read in via the following connection:
^ Interior CAN (CAN B)

Interior CAN
The following signals are read in over the interior CAN:
- Vehicle speed, provided by instrument cluster (A1)
- Engine speed, provided by EZS control unit (N73)
- Circuit 61 status from front-passenger SAM control unit (N10/11)

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

Control of functions
The vehicle power supply control unit is the master control unit for on-board electrical system management and controls the following functions:
- Recording battery state
- Controlling consumer shutoff
- Control of on-board electrical system battery charge

Actuation of components
The actuation of the components takes place via the following connections:
^ Interior CAN

Interior CAN
The signals are sent by the vehicle power supply control unit over the interior CAN.

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