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Technology for comfort, convenience and safety
80
In the event of a pressure loss, there is a change
in the rolling circumference and therefore the
rotation speed of the corresponding wheel. The
system detects this change and reports it as a
flat tire.
Functional requirement
The system must have been initialized when the
tire inflation pressure was correct; otherwise,
reliable signaling of a flat tire is not ensured.
The initialization must be repeated after
every correction of the tire inflation pres-
sure and after every tire or wheel change.<
System limits
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
> Sporty driving style: slip in the drive wheels,
high lateral acceleration
> Driving with snow chains
*
Initializing system
The initialization finishes during driving,
which can be interrupted at any time.
When driving resumes, the initialization is con-
tinued automatically. The system is initialized
after this activation phase.
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.
The system is not initialized when traveling with
snow chains
*
.<
With Sequential Manual Transmission via the
button in the center console:
1. Start the engine, but do not start driving.
2. Press the button for approx. 5 seconds.
After the button is released, the warning
lamp lights up in yellow for several seconds
in the instrument cluster, refer to Indication
of a flat tire. The message "Activating…"
appears on the Control Display for a few
seconds.
3. Start to drive.
The initialization finishes during the trip
without providing feedback.
iDrive, for operating principle refer to page 16.
1. "Vehicle Info"
2. "Vehicle status"
3. "Reset"
4. Start the engine - do not drive away.
5. Start the initialization using "Reset".
"Activating…" is displayed on the Control
Display.
6. Start to drive.
The initialization finishes during driving, which
can be interrupted at any time. "Flat Tire Moni-
tor active" is displayed on the Control Display.
Online Edition for Part no. 01 41 2 602 735 - © 08/09 BMW AGOnline Edition for Part no. 01 41 2 602 735 - © 08/09 BMW AG
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