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.

Seat module	Coding	Coding
Installation location	Driver / Passenger	Front / Rear
Driver's seat	Open	Open
Passenger seat	Earth	Open
Driver's side, rear	Open	Earth
Passenger side, rear	Earth	Earth

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 code memory, there is also an information memory for the seat modules. The following data is stored in the information memory:

Excess temperature from control unit
Undervoltage detection

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