Component description for driver seat control unit - GF91.29-P-5231FQ
MODEL 218 with CODE 275 (Electrically adjustable front seats memory package)
Shown on left seat
Location
The driver seat control unit is located at the bottom of the driver seat frame.
Task
The driver seat control unit controls the following functions:
- Seat and steering column adjustment
- Easy entry/exit
- Head restraint presetting
- Memory function for seat, outside mirrors and steering column
- Memory function for the active multicontour seat (with code (432) Active multicontour seat)
- Collision avoidance with the bench seat in rear (with model 218.3 with code (287) Through-loading feature or model 218.9)
The tasks are subdivided as follows:
- 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
- Interior CAN (CAN B)
Direct line
The signals from the following sensors are read via direct lines:
- Steering column in/out Hall sensor (M20/1b1)
- Steering column up/down Hall sensor (M20/2b1)
- Seat fore/aft adjustment Hall sensor, driver seat (M27/1b1)
- Height adjustment Hall sensor, driver seat (M27/2b1)
- Inclination adjustment Hall sensor, driver seat (M27/3b1)
- Head restraint adjustment Hall sensor, driver seat (M27/4b1)
- Backrest inclination Hall sensor, driver seat (M27/5b1)
Interior CAN
The following signals are read in over the interior CAN:
- Seat adjustment request
- Steering column adjustment request
- Save/adopt memory position request
- Front door status
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Evaluation of input factors
The read in input factors are evaluated by the driver seat control unit. The motors for seat and steering column adjustment are actuated via integrated relays.
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)
Interior CAN
The following signals are transmitted via the interior CAN:
- Seat adjustment status
- Request for acoustic acknowledgment after successful memory position storage
- Save/adopt memory position request
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
| Wiring diagram of driver-side seat control unit | PE91.29-P-2104-97XAA |