Brake force display – BMW X3 2.5i SAV 2005 User Manual
Page 51
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The check of the tire inflation pressure is based
on monitoring the relative speeds of the wheels.
A flat tire is detected and reported on the basis
of a deviation in certain speed ratios.
Functional requirement
So that the Flat Tire Monitor can learn the cor-
rect inflation pressure, please perform the fol-
lowing steps:
1.
Check the inflation pressures in all tires
2.
Compare with the inflation pressure table
on page
and correct if necessary
3.
Initialize the system.
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 tires.
<
In the following situations, on the other hand,
there can be delays in detecting tire pressure
losses, and even system failure:
>
When driving on snow-covered or slippery
road surfaces.
>
In the case of performance-oriented driving:
slip in the drive wheels, high lateral acceler-
ation.
>
False alarms and undetected loss of pres-
sure may occur when you are driving with
snow chains fitted.
>
When driving with a compact wheel, the Flat
Tire Monitor cannot operate.
Initializing system
Perform the initialization immediately
every time you correct the inflation pres-
sure, change a tire or change a wheel or all
wheels. This requires a trip.
<
1.
Start the engine, but do not begin to drive.
2.
Press the button until the yellow indicator
lamp in the instrument cluster lights up for a
few seconds.
3.
Begin driving.
It takes a few minutes until the Flat Tire Monitor
can detect and indicate a flat tire.
Do not initialize the system when driving
with snow chains or with a compact
wheel.
<
Indication of a flat tire
The warning lamp lights up yellow.
There is a flat tire or extensive inflation
pressure loss.
1.
Reduce speed and stop the vehicle care-
fully. Avoid sudden braking and steering
maneuvers.
2.
Identify damaged tire.
If identification is not possible, con-
tact your BMW Sports Activity Vehi-
cle Center.
<
3.
Replace the damaged wheel, refer to
Changing a wheel on page
.
Brake Force Display
The Brake Force Display lights up in two
stages, depending on how heavily you brake.
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