Parking Brake Control: Description and Operation

GF42.20-P-5000LE Electric parking brake controller unit, component description

Component Identification:

Location
The electric parking brake controller unit is located on the left of the rear axle.

Task
The electric parking brake controller unit 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
^ Front end CAN

Direct line
The signals from the following component are read in via a direct connection:

- Status of electric parking brake switch (S76/15)

Front end CAN
The following information is read in via the interior CAN:

- Status of circuit 15 (provided by the EIS [EZS] control unit (N73) on the chassis CAN and passed on by the central gateway control unit (N93) on the front end CAN)

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.

Actuation of components
The actuation of the components takes place via the following connections:
^ Direct line
^ Front end CAN

Direct line
The electric parking brake controller unit operates the integrated electric motor for operating the parking brake at the rear axle via a direct line.

Front end CAN
The following components are actuated via the front end CAN:

- Instrument cluster (A1) (output of messages and warnings)
- ESP control unit (N47-5) (introduction of emergency stop)

The requests are passed on to the respective control unit by the central gateway control unit.