>
When driving uphill on snow-covered roads,
in slush or on unplowed, snow-covered
roads
assistant will no longer hold the car in place
after approx. 2 seconds and the car will start to
roll backwards.<
>
>
When rocking a stuck vehicle free or start-
ing off in deep snow or on loose ground
Flat Tire Monitor FTM*
When driving with snow chains
The concept
Activating DTC
The Flat Tire Monitor detects pressure loss in a
tire by comparing the rotating speeds of the
individual tires while moving.
In the event of pressure loss, the rolling circum-
ference changes and, thus, the rotating speed
of the affected wheel. This change is detected
and is reported as a flat tire.
Functional requirement
In order to assure the reliable reporting of a flat
tire, the system must be initialized for the cor-
rect tire inflation pressure.
Press the button; the indicator lamps for DTC in
the instrument cluster come on.
The system must be reinitialized each
time a tire inflation pressure has been cor-
rected or a wheel or tire has been changed.<
For better control
If the indicator lamp flashes:
DTC is regulating the drive and braking
forces.
System limitations
If the indicator lamps are on:
DTC has been activated.
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.<
Deactivating DTC
Press the button again; the DTC indicator
lamps in the instrument cluster go out.
In the following situations, the system could be
delayed or malfunction:
>
>
>
System has not been initialized
Drive-off assistant
Driving on snowy or slippery road surface
The drive-off assistant enables you to drive off
smoothly on uphill gradients. It is not necessary
to use the parking brake for this.
Performance-oriented style of driving: slip
in the drive wheels, high lateral acceleration
>
Snow chains are attached
1.
Hold the car in place by depressing the
brake.
Initializing the system
2.
Release the brake and drive off without
delay.
The initialization is completed during driv-
ing, which can be interrupted at any time.
When driving resumes, the initialization is con-
tinued automatically.
The drive-off assistant holds the car in
place for approx. 2 seconds after the
brake is released. Drive off without delay after
releasing the brake. Otherwise, the drive-off
Do not initialize the system while snow chains
are attached.<
66
Online Edition for Part no. 01 41 2 600 853 - © 08/08 BMW AG
| Categories | BMW 1-Series Manuals, BMW Manuals |
|---|---|
| Tags | BMW 128i, BMW 135i, BMW E82, BMW E88 |
| Model Year | 2009 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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