Component description for driver seat control unit - GF91.29-P-5231CE

MODEL 204.0 /2 with CODE (275) Memory package (driver seat, steering column, mirrors) as of model year 2009 /YoM 08 

MODEL 204.3 with CODE (275) Memory package (driver seat, steering column, mirrors) 

MODEL 204.9 with CODE (275) Memory package (driver seat, steering column, mirrors) 

Shown on model 204.0 

Location 

The driver seat control unit is located beneath the seat cushion at the frame of the driver seat.

Tasks 

• Control of the seat and steering column adjustment as per the requests via the interior CAN (CAN B)
• Storing the memory settings for seat, steering column, and outside mirror
• Control of the easy entry/exit feature
• Control of head restraint presetting

Additionally in model 204.0/2 as of 1.6.09 and model 204.3/9:

• Driver seat lumbar support adjusting facility control unit power supply (N32/23)

The driver seat control unit tasks are split up as follows:

• Reading in of sensors and signals 
• Evaluating input factors 
• Actuation of components 

Reading in of sensors and signals 

The driver seat control unit reads in the input factors via the following connections:

• Direct line 
• Interior CAN 

Direct line 

The following sensors are read in via direct lines:

• Hall sensors of the seat adjustment motors
• Hall sensors of the steering column adjustment motors

Interior CAN 

The signals are read in by the driver seat control unit via 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 relevant 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 motors are actuated via direct lines:

• Steering column in/out adjustment motor (M20/1)
• Steering column up/down adjustment motor (M20/2)
• Driver seat fore/aft adjustment motor (M27/1)
• Driver seat height adjustment motor (M27/2)
• Driver seat inclination adjustment motor (M27/3)
• Driver seat head restraint adjustment motor (M27/4)
• Driver seat backrest inclination adjustment motor (M27/5)

Additionally in model 204.0/2 as of 1.6.09 and model 204.3/9:

• Driver seat lumbar support adjustment control unit

Interior CAN 

The signals are transmitted by the driver seat control unit via interior CAN.

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

Variants 

There are no variants for the hardware of the driver seat control unit.

The country or left-hand drive vehicle/right hand drive vehicle allocation is software coded.

Wiring diagram of driver-side seat control unit

PE91.29-P-2104-97FAA