Steering Wheel Heater Control Module: Description and Operation

GF54.21-P-4172FL Steering Wheel Heater Control Unit, Component Description
MODEL 212.0 /2
- with CODE (443) Steering wheel heater





Illustrated on model 212.0
N25/7 Steering wheel heater control unit

Location
The steering wheel heater control unit is located on the driver-side in the instrument panel under the steering column.

Task
The steering wheel heater control unit has the following tasks:
^ Reading in of sensors and signals
^ Evaluation of input factors
^ Actuation of components

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

Interior CAN
The signals are read in by the steering wheel heater control unit 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
Components are actuated with the following lines:
^ Direct line
^ Interior CAN

Direct line
The following component is actuated via a direct line:
- Steering wheel heater heating element (R22/4r1)

Interior CAN
The signals are transmitted by the steering wheel heater control unit via the interior CAN.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).