1 Series E81 118i (N46T) 3-door
known as "crash safety module").
The indicator lamp for passenger airbag deactivation is actuated by the crash safety module.
Emergency call button
Although the emergency call button is installed in the roof control panel, there is no electrical connection
between it and the panel. The emergency call button is directly connected to the telephone control unit.
Depending on the equipment fitted, the telephone control unit is the TCU or the ULF (TCU: Telematic Control
Unit; ULF: universal charger and hands-free system).
Microphone
If a telephone has been installed, the two microphones for the telephone will also have been installed in the roof
control panel. The two microphones are directly connected to the respective telephone control unit.
> E93
The microphone is located on the steering column.
Note: From 09/2006, only 1 microphone is to be fitted. This change will be introduced gradually through the various
model series.
The installation location of the microphone in the FZD depends on the national version (LHD or RHD). That
means: On LHD vehicles, the microphone is installed on the left. On RHD vehicles, the microphone is
installed on the right.
2. The FZD control unit in the roof control panel controls the following functions:
Controlling the reading lamp
The FZD control unit evaluates the buttons for the reading lamp and activates the reading lamp.
Control of interior lighting and top-light
For the control of the interior lighting and the top-light, the FZD control unit simply transmits data to the footwell
module. The interior lighting and top-light are controlled as follows:
•
Interior light
-
When the interior-light button on the roof control panel is pressed, the FZD control unit sends a
corresponding message to the footwell module.
-
The footwell module sends a "Switch ON" or "Switch OFF" request to the roof function centre control
unit.
-
The FZD control unit sends the "Switch ON" or "Switch OFF" request to the interior lights.
The interior lighting is subject to the following regulations:
-
Overrun of interior lighting: Depending on the encoding, the interior lights are switched on for a while
after terminal R is switched off. The message is sent from the footwell module.
-
Dimming: The interior lighting can be switched on dimmed or immediately at full illumination intensity.
The message is sent from the footwell module when the interior-light button is pressed. The dimming
settings are controlled by the FZD control unit.
-
Controlling the power supply: The power supply for the interior lights is controlled by the FZD control
unit with pulse-width modulation in order to compensate for voltage fluctuations in the vehicle's system.
-
Consumer shutdown: The footwell module switches the entire interior lighting off when the "Consumer
shutdown" message is sent on the K-CAN. This message is transmitted when the charge state of the
battery is poor to maintain the battery's ability to start the vehicle for as long as possible, or for a
defined time after terminal R is switched OFF.
•
Top-light
SBT Roof control panel E70, E81, E87, E90, E91, E92, E93
BMW AG - TIS
19.01.2013 06:28
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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