Flat Tire Monitor Ftm - BMW SERIE 3 SEDAN 2005 Owner's Manual

Display of this malfunction on Cana-
dian models.

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
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
> If 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.
Online Edition for Part-No. 01 41 0 159 256 - © 03/05 BMW AG
Do not initialize the system while snow chains
are attached.<
1. Start the engine immediately before pulling
away, but do not drive off yet.
2. Lightly push button 1 in the turn indicator
stalk repeatedly up or down until the appro-
priate symbol appears in the display,
accompanied by the word "INIT".
3. Press button 2 to confirm your choice of the
Flat Tire Monitor.
4. Press button 2 and hold it down for approx.
5 seconds, until the reading shown below is
displayed.
changed.<
5. Start to drive.
Initialization is completed while the car is on
the move, without any feedback.
Indication of a flat tire
1. Cautiously reduce speed to below 50 mph
or 80 km/h. Avoid sudden braking and
The warning lamps come on in yellow
and red. In addition, an acoustic sig-
nal sounds. There is a flat tire or sub-
stantial loss of tire pressure.
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