Flat tire monitor ftm, Te chnology for driving comfort and safe ty – BMW 2007 bmw 328i User Manual

Page 92

chnology for

driving comfort

and

safe

Flat Tire Monitor FTM*

The concept

The Flat Tire Monitor monitors tire pressures
while the car is being driven. The system
reports any significant loss of pressure in one
tire in relation to another.
If a tire loses pressure, its rolling radius
changes, and this in turn alters the speed of
rotation. This change is detected and is
reported as a flat tire.

Functional requirement

In order to assure the reliable reporting of a flat
tire, the system must be initialized for the cor-
rect tire inflation pressure.

The system must be reinitialized each
time a tire inflation pressure has been cor-

rected or a wheel or tire has been changed.

System limitations

The Flat Tire Monitor is unable to warn
the driver of sudden, severe tire damage

caused by external factors, nor can it identify
the gradual loss of pressure that will inevitably
occur in all four tires over a lengthy period of
time.

In the following situations, the system could be
delayed or malfunction:

System has not been initialized

Driving on snowy or slippery road surface

Performance-oriented style of driving: slip
in the drive wheels, high lateral acceleration

Snow chains are attached

Initializing the system

The initialization is completed during driv-
ing, which can be interrupted at any time.

When driving resumes, the initialization is con-
tinued automatically.
Do not initialize the system while snow chains
are attached.

iDrive, for operating principle refer to page

Press the

button.

This opens the start menu.

Press the controller to open the menu.

Select "Settings" and press the controller.

Select "Vehicle / Tires" and press the con-
troller.

If necessary, move the highlight marker to
the uppermost field. Turn the controller
until "FTM" is selected and press the con-
troller.

Start the engine, but do not start driving.

Select "Reset" and press the controller.

Select "Yes" and press the controller.

Start to drive.
Initialization is completed while the car is in
motion.