Seat Back: Description and Operation

Seat Module

Brief description of components

Seat module driver's side/passenger side
Depending on equipment, the front seats are equipped with different seat modules. In general, there are 2 different module sizes:
- Module with 10-chamber plug connection
- Module with 8-chamber plug connection

If the seat is equipped with the special equipment lumbar support adjustment or Active Seat, the module is fitted with a 10-chamber plug connection.

The seat module is secured directly to the corresponding seat.

The seat modules are networked with the vehicle via the CAN BUS.

Seat module, rear driver's side/rear passenger side
The seat modules are fitted in the luggage compartment.

The module with 10-chamber plug connection is always used.

Allocation of the seat modules
The seat module recognizes the installation position from the wiring harness coding.







Temperature monitoring
The seat modules are equipped with internal temperature monitoring. This enables internal limitation of the inner power loss by reducing the functionality. This concerns:
- the soft start
- the maximum adjusting time
- the heat output of the seat heating

Diagnosis
In addition to the fault memory, there is also an information memory for the seat modules. The following data is stored in the information memory:
- Excess temperature from control module
- Under-voltage detection

The information memory is checked and evaluated in the test module "supply" of each seat module.