Flat tire monitor ftm – BMW X3 3.0i SAV 2006 User Manual

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Activating system

Press the button; the LED lights up.
The LED flashes when the brakes are applied
automatically.

Deactivating system

Press the button again; the LED goes out.
HDC is deactivated immediately above approx.
35 mph/60 km/h and after approx. 10 seconds
when the ignition is switched off.

Using HDC

With manual transmission:
Use HDC in first gear and in reverse, because in
the higher gears the engine's braking action
diminishes.
With automatic transmission:
You can use HDC in every drive position.

Malfunction

If the LED in the button goes out in the HDC
mode or fails to light up when the button is
pressed:
HDC is temporarily not available, because the
brake temperature is too high.

Malfunction in vehicle stability control
systems

The warning lamp lights up yellow. DBC
Dynamic Brake Control is malfunction-
ing. Have the system checked as soon

as possible.

Display of the previously described mal-
function on Canadian models.

If one of the malfunctions described
below occurs, proceed cautiously and

defensively. When driving on poor roads, avoid
using the full throttle or kick-down positions of
the accelerator as well as heavy and panic brak-
ing. Otherwise, the drive train may be damaged
or accidents can occur.

The red brake warning lamp lights up
together with the warning lamps for
ABS and DSC/xDrive. In addition, a
warning signal sounds. ABS, DSC, HDC
and xDrive have failed. It is then possi-
ble to exert driving force only via the
rear axle. If the brake warning lamp
lights up yellow in the described combi-

nation, the EBV Electronic brake-force distribu-
tion is still available. Have the system checked
as soon as possible.

Display of the previously described mal-
function on Canadian models.

The warning lamp lights up continu-
ously and a warning signal sounds:
DSC or the xDrive all-wheel system has

failed.
The stabilizing interventions of DSC or the all-
wheel drive system xDrive are no longer avail-
able. It is then possible to exert driving force
only via the rear axle. Have the system checked
as soon as possible.

Flat Tire Monitor FTM*

The concept

The Flat Tire Monitor keeps track of the infla-
tion pressures in the four mounted tires as you
drive. The system triggers an alert whenever
the inflation pressure in one tire drops signifi-
cantly in relation to the pressure in another tire.
When a loss of pressure occurs, the rolling
radius changes and with it, the rotational speed