The concept
The system does not measure the actual inflation pressure in the tires.
It detects a pressure loss in a tire by comparing the rotational speeds of the individual wheels while moving.
In the event of a pressure loss, the diameter and therefore the rotational speed of the corresponding wheel change. This is detected and reported as a flat tire.
See also:
Reference
This chapter contains technical data, short
commands for the voice activation system, and an
index that will quickly take you to the information
you need. ...
Malfunction
A Check Control message is displayed.
On the Control Display, the areas in front of and
behind the vehicle are shaded. PDC has failed.
Have the system checked.
To ensure full operability:
...
Dynamic options: M Sport package, Adaptive M Sport suspension, sports
automatic transmission and BMW 3-Series xDrive
Enthusiasts will welcome the further features that are available to enhance
the dynamic driving qualities of the new BMW 3-Series and give them a
distinctive visual dimension as well. The M Sport ...