BMW Active Hybrid 5 Bedienungshandbuch PDF herunterladen (Seite 98)

and can lead to tire failure. Under-inflation also

reduces fuel efficiency and tire tread life, and

may affect the vehicle's handling and stopping

ability. Please note that the TPMS is not a sub‐

stitute for proper tire maintenance, and it is the

driver's responsibility to maintain correct tire

pressure, even if under-inflation has not reached

the level to trigger illumination of the TPMS low

tire pressure telltale. Your vehicle has also been

equipped with a TPMS malfunction indicator to

indicate when the system is not operating prop‐

erly. The TPMS malfunction indicator is com‐

bined with the low tire pressure telltale. When

the system detects a malfunction, the telltale will

flash for approximately one minute and then re‐

main continuously illuminated. This sequence

will continue upon subsequent vehicle start-ups

as long as the malfunction exists. When the mal‐

function indicator is illuminated, the system may

not be able to detect or signal low tire pressure

as intended. TPMS malfunctions may occur for

a variety of reasons, including the installation of

replacement or alternate tires or wheels on the

vehicle that prevent the TPMS from functioning

properly. Always check the TPMS malfunction

telltale after replacing one or more tires or

wheels on your vehicle to ensure that the re‐

placement or alternate tires and wheels allow

the TPMS to continue to function properly.

FTM Flat Tire Monitor*

The concept

The system detects a pressure loss on the basis

of speed differences between the individual

wheels while driving.

In the event of a pressure loss, the diameter and

therefore the rotational speed of the corre‐

sponding wheel change. This is detected and

reported as a flat tire.

Functional requirements

The system must have been initialized when the

tire inflation pressure was correct; otherwise,

reliable signaling of a flat tire is not ensured. In‐

itialize the system after each correction of the

tire inflation pressure and after every tire or

wheel change.

System limits

Sudden tire damage

Sudden serious tire damage caused by

external influences cannot be indicated in ad‐

vance.◀

A natural, even pressure loss in all four tires can‐

not be detected.

The system could be delayed or malfunction in

the following situations:

▷ When the system has not been initialized.

▷ When driving on a snowy or slippery road

surface.

▷ Sporty driving style: slip in the drive wheels,

high lateral acceleration.

▷ When driving with snow chains*.

Initialization

The initialization process adopts the set inflation

tire pressures as reference values for the detec‐

tion of a flat tire. Initialization is started by con‐

firming the inflation pressures.

Do not initialize the system when driving with

snow chains*.

"Vehicle Info"

2. "Vehicle status"

3. "Reset"

4. Start the engine - do not drive away.

5. Start the initialization with "Reset".

6. Drive away.

The initialization is completed while driving,

which can be interrupted at any time.

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Safety

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