Steering Wheel Electronics Control Unit, Component Description - GF82.90-P-4006FR

Model 257, 290 up to model year 2021 

Location 

The steering wheel electronics are located directly behind the multifunction steering wheel (MFL) on the steering column tube of the steering column.

Shown on model 257, steering wheel removed 

Tasks 

The steering wheel electronics do the following:

• 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 connections:

• Direct line 
• Steering wheel CAN (CAN LR) 

Direct line 

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

• Heating element temperature sensor (R22/4b1) (with CODE 443 (Steering wheel heater))
• Instrument cluster multifunction steering wheel button group (S163/1)
• Head unit multifunction steering wheel button group (S163/2)
• Steering wheel downshift button (S110/1)
• Steering wheel upshift button (S111/1)
• Horn contact plate (S4/2)

Steering wheel CAN 

The steering wheel electronics receive the signals for actuation of the following components via the steering wheel CAN from the steering column tube module control unit:

• Multifunction steering wheel button groups (symbol illumination)
• Steering wheel heater heating element (R22/4r1) (with CODE 443 (Steering wheel heater))

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 following components are actuated via a direct line:

• Multifunction steering wheel button groups (symbol illumination)
• Steering wheel heater heating element (in code 443 (Steering wheel heater))

Wiring diagram for steering column module control unit

PE46.10-P-2101-97XBA