Flat Tire Monitor Ftm - BMW 525i Owner's Manual

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Flat Tire Monitor FTM*

The concept
The Flat Tire Monitor keeps track of the infla-
tion pressures in the tires as you drive. The sys-
tem provides an alert whenever the inflation
pressure drops significantly in relation to the
pressure in another tire.
In the event of a pressure loss, the rolling radius
and therefore the rotation speed of the wheels
change. 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 initialization must be repeated after
each time the tire inflation pressure is cor-
rected and after every tire or wheel
System limits
The Flat Tire Monitor cannot indicate
sudden severe tire damage caused by
outside factors and does not detect a natural,
even pressure drop in all four
In the following situations, the system could be
delayed or malfunction:
> System has not been initialized
>
Driving on snowy or slippery road surface
> Sporty driving style: slip in the drive wheels,
high lateral acceleration
> Driving with snow chains
When you are driving with the compact wheel
the Flat Tire Monitor is unable to function.
Online Edition for Part no. 01 41 0 012 828 - © 08/06 BMW AG
Initializing system
When driving resumes, the initialization is con-
tinued automatically. Do not initialize the sys-
tem when driving with snow chains
pact wheel
iDrive, for explanation of principle, refer to
page 16.
1.
2.
3.
change.<
4.
5.
tires.<
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7.
The initialization finishes during driving,
which can be interrupted at any time.
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Press the button.
This opens the start menu.
Press the controller to open the menu.
Turn the controller until "Settings" is
selected and press the controller.
Select "Vehicle / Tires" and press the con-
troller.
Change to upper field if necessary. Turn the
controller until "FTM" is selected and press
the controller.
Start the engine, but do not start driving.
Select "Reset" and press the controller.
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or com-
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