BMW X5 xDrive35i Owner's Manual page 102

Function requirements
The system must have been initialized while the
tire inflation pressure was correct; otherwise,
reliable signaling of a flat tire is not ensured.
Initialize the system after every correction of the
tire inflation pressure and after every tire or
wheel change.
System limits
Sudden serious tire damage caused by
external influences cannot be indicated in
advance.<
A natural, even pressure loss in all four tires
cannot be detected. Therefore, check the tire
inflation pressure regularly.
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.
Status display
The current status of the Flat Tire Monitor can
be displayed on the Control Display, e.g.
whether or not the FTM is active.
1. "Vehicle Info"
2. "Vehicle status"
3. "Flat Tire Monitor"
The status is displayed.
100
Online Edition for Part no. 01 41 2 604 009 - © 03/10 BMW AG Online Edition for Part no. 01 41 2 604 009 - © 03/10 BMW AG
Initialization
The initialization process adopts the set infla-
tion tire pressures as reference values for the
detection of a flat tire. Initialization is started by
confirming the inflation pressures.
Do not initialize the system when driving with
snow chains
1.
2.
3.
4.
5.
*
6.
*
When driving resumes, the initialization is con-
tinued
Indication of a flat tire
sounds. There is a flat tire or a major loss in tire
inflation pressure.
Actions in the event of a flat tire
Run-flat tires
You can continue driving with a damaged tire at
speeds up to 50 mph/80 km/h.
page 249, do not continue driving. Continuing
to drive with a flat tire could cause severe acci-
dents.<
*
or with the compact wheel
"Vehicle Info"
"Vehicle status"
"Reset"
Start the engine – do not drive away.
Start the initialization using "Reset".
Start to drive.
The initialization finishes during driving,
which can be interrupted at any time.
automatically.<
The warning lamp lights up red. A
message appears on the Control Dis-
play. In addition, an acoustic signal
If the vehicle is not equipped with run-flat
tires as provided at the factory, refer to
*
.