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EnglishSafety -> FTM Flat Tire Monitor for your BMW X4 2014-2018
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Safety
may cause a warning when temperatures fall
very sharply.
the low tire pressure telltale illuminates, you
should stop and check your tires as soon as
possible, and inflate them to the proper pres‐
sure. Driving on a significantly under-inflated
tire causes the tire to overheat and can lead to
tire failure. Under-inflation also reduces fuel ef‐
ficiency and tire tread life, and may affect the
vehicle's handling and stopping ability. Please
note that the TPMS is not a substitute 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 indi‐
cator to indicate when the system is not oper‐
ating properly. The TPMS malfunction indica‐
tor is combined with the low tire pressure
telltale. When the system detects a malfunc‐
tion, the telltale will flash for approximately one
minute and then remain continuously illumi‐
nated. This sequence will continue upon sub‐
sequent vehicle start-ups as long as the mal‐
function exists. When the malfunction 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 replace‐
ment or alternate tires or wheels on the vehicle
that prevent the TPMS from functioning prop‐
erly. Always check the TPMS malfunction tell‐
tale after replacing one or more tires or wheels
on your vehicle to ensure that the replacement
or alternate tires and wheels allow the TPMS
to continue to function properly.
The system cannot indicate sudden serious
tire damage caused by external circumstances.
Malfunction
The yellow warning lamp flashes and
then lights up continuously. A Check
Control message is displayed. No flat
tire or loss of tire inflation pressure can be de‐
tected.
Examples and recommendations in the follow‐
ing situations:
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A wheel without TPM electronics is
mounted: Have it checked by a dealer’s
service center or another qualified service
center or repair shop as needed.
Malfunction: Have system checked by a
dealer’s service center or another qualified
service center or repair shop.
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TPM was unable to complete the reset.
Reset the system again.
Interference caused by systems or devices
with the same radio frequency: After leav‐
ing the area of the interference, the system
automatically becomes active again.
Declaration according to NHTSA/
FMVSS 138 Tire Pressure Monitoring
System
Each tire, including the spare (if provided)
should be checked monthly when cold and in‐
flated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your
vehicle has tires of a different size than the size
indicated on the vehicle placard or tire inflation
pressure label, you should determine the
proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pres‐
sure telltale when one or more of your tires is
significantly under-inflated. Accordingly, when
FTM Flat Tire Monitor
Concept
The system detects tire inflation pressure loss
on the basis of rotation speed differences be‐
tween the individual wheels while driving.
In the event of a tire inflation pressure loss, the
diameter and therefore the rotational speed of
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Safety
Controls
the corresponding wheel changes. This will be
detected and reported as a flat tire.
Indication of a flat tire
The yellow warning lamp lights up. A
Check Control message is displayed.
The system does not measure the actual infla‐
tion pressure in the tires.
There is a flat tire or a major loss in tire
inflation pressure.
Functional requirements
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.
The system must have been initialized when
the tire inflation pressure was correct; other‐
wise, reliable flagging of a flat tire is not as‐
sured. Initialize the system after each correc‐
tion of the tire inflation pressure and after
every tire or wheel change.
2. Check whether the vehicle is fitted with
normal tires or run-flat tires.
Run-flat tires, refer to page 208, are la‐
beled with a circular symbol containing the
letters RSC marked on the tire's sidewall.
Status display
The current status of the Flat Tire Monitor can
be displayed on the Control Display, for exam‐
ple, whether or not the FTM is active.
WARNING
A damaged regular tire with low or miss‐
ing tire inflation pressure impacts handling,
such as steering and braking response. Run-
flat tires can maintain limited stability. There is
a risk of an accident. Do not continue driving if
the vehicle is not equipped with run-flat tires.
Follow the information on run-flat tires and
continued driving with these tires.◀
1. "Vehicle info"
2. "Vehicle status"
3.
"Flat Tire Monitor (FTM)"
The status is displayed.
Initialization
When a flat tire is indicated, DSC Dynamic Sta‐
bility Control is switched on, if needed.
When initializing, the set tire inflation pres‐
sures serve as reference values in order to de‐
tect a flat tire. Initialization is started by con‐
firming the tire inflation pressures.
System limits
A natural, even tire inflation pressure loss in all
four tires will not be recognized. Therefore,
check the tire inflation pressure regularly.
Do not initialize the system when driving with
snow chains.
On the Control Display:
Sudden serious tire damage caused by exter‐
nal circumstances cannot be recognized in ad‐
vance.
1. "Vehicle info"
2. "Vehicle status"
3.
"Perform reset"
The system could be delayed or malfunction in
the following situations:
4. Start the engine but do not drive off.
5. Start the initialization with "Perform reset".
6. Drive away.
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When the system has not been initialized.
When driving on a snowy or slippery road
surface.
The initialization is completed while driving,
which can be interrupted at any time.
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Sporty driving style: spinning traction
wheels, high lateral acceleration (drifting).
The initialization automatically continues when
driving resumes.
When driving with snow chains.
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Controls
Safety
A vehicle with a damaged tire reacts differ‐
ently, e.g., it has reduced lane stability during
braking, a longer braking distance and different
self-steering properties. Adjust your driving
style accordingly. Avoid abrupt steering ma‐
neuvers or driving over obstacles, e.g., curbs,
potholes, etc.
Actions in the event of a flat tire
Normal tires
1. Identify the damaged tire.
Check the air pressure in all four tires, e.g.,
using the tire pressure gage of a tire repair
kit.
Because the possible driving distance de‐
pends on how the vehicle is used during the
trip, the actual distance may be shorter or lon‐
ger depending on the driving speed, road con‐
ditions, external temperature, cargo load, etc.
If the tire inflation pressure in all four tires
is correct, the Flat Tire Monitor may not
have been initialized. In this case, initialize
the system.
If identification of flat tire damage is not
possible, please contact a dealer’s service
center or another qualified service center
or repair shop.
WARNING
Your vehicle handles differently when a
run-flat tire is damaged and has low or missing
tire inflation pressure, e.g., your lane stability is
reduced when braking, braking distances are
longer and the self-steering properties will
change. There is a risk of an accident.
2. Repair the flat tire, e.g., with a tire repair kit
or by changing the tire.
Run-flat tires
Drive moderately and do not exceed a speed of
50 mph/80 km/h.◀
Maximum speed
You may continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
Final tire failure
Vibrations or loud noises while driving can indi‐
cate the final failure of a tire.
Continued driving with a flat tire
If continuing to drive with a damaged tire:
Reduce speed and stop; otherwise, pieces of
the tire could come loose and cause an acci‐
dent.
1. Avoid sudden braking and steering maneu‐
vers.
Do not continue driving. Contact a dealer’s
service center or another qualified service cen‐
ter or repair shop.
2. Do not exceed a speed of 50 mph/80 km/h.
3. Check the air pressure in all four tires at
the next opportunity.
If the tire inflation pressure in all four tires
is correct, the Flat Tire Monitor may not
have been initialized. In this case, initialize
the system.
Intelligent Safety
Concept
Possible driving distance with complete loss of
tire inflation pressure:
Intelligent Safety enables central operation of
the driver assistance system. Depending on
how the vehicle is equipped, Intelligent Safety
consists of one or more systems that can help
prevent an imminent collision.
The possible driving distance with a flat tire
depends on cargo load, driving style and road
conditions.
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City light braking function warning, refer to
page 113.
A vehicle with an average load has a possible
driving range of approx. 50 miles/80 km.
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