Seat Heater Control Unit, Component Description - GF91.30-P-5214RF
Model 205, 253
with code 401 (Climatized front seats)
except code 221 (Electrically adjustable left driver seat)
except code 222 (Electrically adjustable right driver seat)
except code 242 (Front passenger seat, electrically adjustable with memory function)
except code 275 (Memory Package (driver's seat, steering column and mirror))
Model 205, 253
with code 872 (Left and right rear seat heating)
Model 205, 253
with code 873 (Left and right driver's seat heating)
except code 221 (Electrically adjustable left driver seat)
except code 222 (Electrically adjustable right driver seat)
except code 242 (Front passenger seat, electrically adjustable with memory function)
except code 275 (Memory Package (driver's seat, steering column and mirror))
With code 401 (Seat climate control for driver and front passenger) or with code 873 (Seat heater for driver and front passenger)
The front seat heater control unit in the front passenger seat functionally replaces the driver seat heater control unit and the front passenger seat heater control unit. In the following sections, only the term "seat heater control unit" is used.
With CODE 872 (Seat heater in rear), shown on model 205.1
Location
With code 401 (Seat climate control for driver and front passenger) or with code 873 (Seat heater for driver and front passenger):
The seat heater control unit is located on the seat frame of the respective front seat (model 205 up to 31.05.2015) or on the seat frame for the front passenger seat (model 205 as of 01.06.2015, model 253).
With CODE 872 (Seat heater in rear):
The rear seat heater control unit is located in the center under the rear bench.
Tasks
The seat heater control unit has the following tasks:
- Control of the seat heater
- Control of the seat ventilation (with CODE 401 (Seat climate control for driver and front passenger))
The tasks are subdivided as follows:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
- Transmitting signals
Reading in of signals
The seat heater control unit reads in the following signals via the heater LIN (LIN B28):
- Seat heater request
- Seat ventilation request (with code 401 (Seat climate control for driver and front passenger))
Evaluation of input factors
The input factors that have been read in are evaluated by the seat heater control unit and the relevant components are then actuated.
Actuation of components
The seat heating control unit (with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heating for driver and front passenger)) actuates the following components over 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))
- 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))
- Left front seat cushion heater pad (R13/1)
- Left front seat backrest heater pad (R13/2)
- Right front seat cushion heater pad (R13/3)
- Right front seat backrest heater pad (R13/4)
The rear seat heater control unit (with CODE 872 (Seat heater in rear)) actuates the following components via direct lines:
- Left rear seat surface heater pad (R13/5)
- Left rear backrest heater pad (R13/6)
- Right rear seat surface heater pad (R13/7)
- Right rear backrest heater pad (R13/8)
Transmitting signals
The seat heater control unit sends the following signals via the heater LIN:
- Seat heater status
- Seat ventilation status (with CODE 401 (Seat climate control for driver and front passenger))
| Wiring diagram for rear seat heater control unit | Model 205 up to model year 2019 with code 872 (Left and right rear seat heating) Model 253 with code 872 (Left and right rear seat heating) | PE91.30-P-2101-97FBA | |
| Model 205 as of model year 2019 with code 872 (Left and right rear seat heating) | PE91.30-P-2101-97FBB | ||
| Wiring diagram for front passenger seat heater control unit, driver seat heater control unit | Model 205 up to model year 2016 with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heating for driver and front passenger) | PE91.30-P-2104-97FBA | |
| Model 205 as of model year 2016 up to model year 2019 with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heating for driver and front passenger), model 253 with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heating for driver and front passenger) | PE91.30-P-2104-97FBB | ||
| Model 205 as of model year 2019 with code 401 (Seat climate control for driver and front passenger) or code 873 (Seat heating for driver and front passenger) | PE91.30-P-2104-97FBC |