Front Passenger Seat Control Unit, Component Description - GF91.29-P-5241FR
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 front passenger seat control unit (N32/2) 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 front passenger seat control unit is located at the bottom of the front passenger seat frame.
Task
The front passenger seat control unit is responsible for the following tasks:
- Control of the seat adjustment
- Store/move to memory settings for the front passenger seat (with code 275 (Memory package))
- Control of collision avoidance (with code 287 (Folding rear seat backrests) and code 275 (Memory Package))
- Actuating PRE-SAFE® positioning function of front passenger seat (with 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):
- Seat fore/aft adjustment Hall sensor, front passenger seat (M28/1b1)
- Head restraint adjustment Hall sensor, front passenger seat (M28/4b1)
- Backrest inclination Hall sensor, front passenger seat (M28/5b1)
- Seat cushion length adjustment Hall sensor, front passenger seat (M28/8b1)
- Seat inclination adjustment Hall sensor, front passenger seat (M28/9b1)
- Seat height adjustment Hall sensor, front passenger seat (M28/10b1)
With code 902 (Seat heater plus for driver and front passenger):
- Right front seat cushion seat side bolster heater pad temperature sensor (R13/13b1)
- Right front seat backrest seat side bolster heater pad temperature sensor (R13/14b1)
Interior CAN
The front passenger seat control unit reads in the following signals via interior CAN, among other things:
- Seat adjustment request
- 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 front passenger seat control unit and the relevant components are then actuated.
Actuation of components
The following components are actuated via direct lines:
- Right front seat cushion seat ventilation motors (M18/11) (with CODE 401 (Seat climate control for driver and front passenger))
- Right front backrest seat ventilation motors (M18/12) (with CODE 401 (Seat climate control for driver and front passenger))
- Front passenger seat fore/aft adjustment motor (M28/1)
- Head restraint adjustment seat adjustment motor, front passenger seat (M28/4) (with code 275 (Memory package))
- Front passenger seat backrest inclination adjustment motor (M28/5)
- Seat cushion length adjustment seat adjustment motor, front passenger seat (M28/8) (with code 275 (Memory package))
- Seat inclination adjustment motor, front passenger seat (M28/9)
- Seat adjustment motor, seat height adjustment, front passenger seat (M28/10)
- Right front seat cushion heater pad (R13/3) (with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heater for driver and front passenger))
- Right front seat backrest heater pad (R13/4) (with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heater for driver and front passenger))
- Right front seat cushion seat side bolster heater pad (R13/13) (with code 902 (Seat heater plus for driver and front passenger))
- Right front seat backrest seat side bolster heater pad (R13/14) (with code 902 (Seat heater plus for driver and front passenger))
Transmitting signals
The front passenger seat control unit sends signals via the following connections:
- Front passenger seat LIN (LIN B19) (with code 902 (Seat heater plus for driver and front passenger))
- Interior CAN
Front passenger seat LIN (with code 902 (Seat heater plus for driver and front passenger))
Amongst other things, the front passenger seat control unit transmits the "Switch on seat heater" request via the front passenger seat LIN to the front passenger seat heater control unit (N25/4).
Interior CAN
The front passenger seat control unit sends the following signals via interior CAN, among other things:
- Acknowledge tone request after memory storage (with code 275 (Memory package))
- Seat position status (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 front passenger seat control unit. The country or left-hand drive vehicle/right hand drive vehicle allocation is software coded.
| Wiring diagram of front passenger-side seat control unit | PE91.29-P-2105-97XBA |