3 Series E91 330xi (N52) TOUR
The number of buttons and their functions depend on the options fitted.
-
Switch for lumbar-support adjustment
If lumbar support is fitted, the seat will have a rocker switch on the outside of the front.
-
Switch for seat back width adjustment
If sports seats are fitted, the seat will have a rocker switch on the outside of the front.
-
Seat memory button
Only the driver's seat features additional memory buttons for the seat memory.
-
Button for rear easy-entry facility
> E81, E92, E93
The rear easy-entry facility is controlled by the button on the seat backrest.
-
Backrest locking switch for driver and front passenger
> E93
The backrest locking switch monitors the locking of the respective backrest and forwards the information to the
seat module concerned.
If the backrest is not correctly locked, the seat module will issue a message on the K-CAN. The Check-Control
message is shown in the instrument cluster and in the central information display.
Seats with three-point seat belt integrated in the backrest are fitted on the cabriolet. If the backrest is not locked
correctly, there is the danger that in the event of an accident occupants could move forward with the backrests
and so have no restraint protection.
-
Seat heating switch
The switches for the seat heating are located in the centre console switch cluster.
-
Hall sensors
Hall sensors are provided for identifying of the position of seats with seat memory.
The sensors are integrated in the seat drives.
-
Temperature sensor for seat heating
A temperature sensor is installed in each of the seat cushions for the seat heating.
The seats are controlled by the following control units and bus systems:
-
Seat module
The driver's seat module (SMFA) control unit is fitted with the special equipment "Electric seat adjustment for
driver's seat and front passenger's seat with memory for driver's seat".
[more ...]
-
Seat heating module
If there is no seat module installed, the seat heating module takes over control of the seat heating.
The seat heating module is not recognised as a control unit in its own right. In other words, the seat heating
module is also capable of diagnosis.
[more ...]
-
JBE: Junction box electronics
The junction box electronics is the central gateway in the vehicle. The junction box electronics controls the seat
heating
[for further information, please refer to SI Technology (SBT) 61 05 04 095]
-
K-CAN: Body controller area network
K-CAN is a two-wire bus for communication between all control units connected to the K-CAN.
The following actuators are activated to perform the seat functions:
-
Seat heating
SBT Electrically adjustable seats E81, E87, E90, E91, E92, E93
BMW AG - TIS
22.02.2013 01:37
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 2 -
