Component Description For Driver Seat Control Unit - GF91.29-P-5231FR
Model 257, 290
up to model year 2021
with code 275 (Memory Package (driver's seat, steering column and mirror))
Model 257, 290
up to model year 2021
with code 278 (Fully electric front seats)
The component description for the driver seat control unit (N32/1) describes a left-hand drive vehicle. Right-hand drive vehicles are to be observed mirror inverted with regard to the designations of the electric components.
Location
The driver seat control unit is located at the bottom of the driver seat frame.
Task
The driver seat control unit is responsible for the following tasks:
- Control of the seat adjustment
- Steering column adjustment control (with CODE 275 (Memory package))
- Storing/moving to the memory settings for the seat and the steering column (with CODE 275 (Memory package))
- Control of the easy entry and exit feature (with CODE 275 (Memory package))
- Control of the crash-active easy exit feature (with CODE 275 (Memory package))
- Control of collision avoidance (with code 287 (Folding rear seat backrests) and code 275 (Memory Package))
The tasks are subdivided as follows:
- Reading in of sensors and signals
- Evaluation of input factors
- Actuation of components
- Transmitting signals
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 in via direct lines:
With CODE 275 (Memory package):
- 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)
- Head restraint adjustment Hall sensor, driver seat (M27/4b1)
- Backrest inclination Hall sensor, driver seat (M27/5b1)
- Seat cushion length adjustment Hall sensor, driver seat (M27/8b1)
- Seat inclination adjustment Hall sensor, driver seat (M27/9b1)
- Seat height adjustment Hall sensor, driver seat (M27/10b1)
With code 902 (Seat heater plus for driver and front passenger):
- Left front seat cushion side bolster heater pad temperature sensor (R13/11b1)
- Left front seat backrest side bolster heater pad temperature sensor (R13/12b1)
Interior CAN
The driver seat control unit reads in the following signals via interior CAN, among other things:
- Seat adjustment request
- Steering column adjustment request (with code 275 (Memory package))
- Store/move to memory position request (with code 275 (Memory package))
- Status of seat backrest in rear passenger compartment (with code 287 (Folding rear seat backrests) and code 275 (Memory Package))
Evaluation of input factors
The input factors that have been read in are evaluated by the driver seat control unit and the relevant components are then actuated.
Actuation of components
The following components are actuated via direct lines:
- Left front seat cushion seat ventilation motors (M18/9) (with CODE 401 (Seat climate control for driver and front passenger))
- Left front backrest seat ventilation motors (M18/10) (with CODE 401 (Seat climate control for driver and front passenger))
- Steering column in/out adjustment motor (M20/1) (with CODE 275 (Memory package))
- Steering column up/down adjustment motor (M20/2) (with CODE 275 (Memory package))
- Driver seat fore/aft adjustment motor (M27/1)
- Head restraint adjustment seat adjustment motor, driver seat (M27/4) (with CODE 275 (Memory package))
- Driver seat backrest inclination adjustment motor (M27/5)
- Seat cushion length adjustment seat adjustment motor, driver seat (M27/8) (with CODE 275 (Memory package))
- Driver seat inclination adjustment motor (M27/9)
- Driver seat height adjustment motor (M27/10)
- Left front seat cushion heater pad (R13/1) (with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heater for driver and front passenger))
- Left front seat backrest heater pad (R13/2) (with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heater for driver and front passenger))
- Left front seat cushion seat side bolster heater pad (R13/11) (with code 902 (Seat heater plus for driver and front passenger))
- Left front seat backrest seat side bolster heater pad (R13/12) (with code 902 (Seat heater plus for driver and front passenger))
Transmitting signals
The driver seat control unit sends signals via the following connections:
- Seat LIN, driver (LIN B18) (with code 902 (Seat heater plus for driver and front passenger))
- Interior CAN
Seat LIN, driver (with code 902 (Seat heater plus for driver and front passenger))
The driver seat control unit transmits, among other things, the "Switch on seat heater" request via the driver seat LIN to the driver seat heater control unit (N25/5).
Interior CAN
The driver seat control unit sends the following signals via interior CAN, among other things:
- Acknowledge tone request after memory storage (with code 275 (Memory package))
- Save/move to memory position request (with code 275 (Memory package))
- Seat ventilation status (with CODE 401 (Seat climate control for driver and front passenger))
- Seat heater status (with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heater for driver and front passenger) or code 902 (Seat heater plus for driver and front passenger))
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-2104-97XBA |