Mazda Mazda3 2019 Owner's Manual page 350

When Driving
Tyre Pressure Monitoring System
Please note that the TPMS is not a
substitute for proper tyre maintenance,
and it is the driver's responsibility to
maintain correct tyre pressure, even if
under-inflation has not reached the level
to trigger illumination of the TPMS low
tyre pressure telltale.
Your vehicle has also been equipped with
a TPMS malfunction indicator to indicate
when the system is not operating
properly.
The TPMS malfunction indicator is
combined with the low tyre pressure
telltale. When the system detects a
malfunction, the telltale will flash for
approximately one minute and then
remain continuously illuminated. This
sequence will continue upon subsequent
vehicle start-ups as long as the
malfunction exists. When the
malfunction indicator is illuminated, the
system may not be able to detect or
signal low tyre pressure as intended.
TPMS malfunctions may occur for a
variety of reasons, including the
installation of replacement or alternate
tyres or wheels on the vehicle that
prevent the TPMS from functioning
properly. Always check the TPMS
malfunction telltale after replacing one
or more tyres or wheels on your vehicle to
ensure that the replacement or alternate
tyres and wheels allow the TPMS to
continue to function properly.
To avoid false readings, the system
samples for a little while before
indicating a problem. As a result it will
not instantaneously register a rapid tyre
deflation or blow out.
4-224
▼ If there is a problem with the tyre
pressure monitoring system
If the TPMS warning light flashes, there
may be a problem with the system.
Consult an Authorised Mazda Dealer to
have the system inspected.
Refer to Tyre Pressure Monitoring System
(TPMS) Warning Indication/Warning
Light (Flashing) on page 7-29.
In the following cases, the system cannot
recognise the tyre pressures correctly and
the TPMS warning light may flash.
There is equipment or a device nearby

emitting radio signals the same as a tyre
pressure sensor.
A metallic object such as a non-genuine

electronic device is installed near the
centre of the instrument panel (obstructs
the radio signals from the tyre pressure
sensors to the receiver).
A device such as one of the following is

used in the cabin.
Electronic devices such as a computer.

Converter devices such as a DC-AC

converter.
There is a large accumulation of snow or

ice around the vehicle tyres.
The battery in a tyre pressure sensor is

dead.
A wheel not equipped with a tyre

pressure sensor is used.
Tyres employing steel in the sidewall of

the tyre are installed.
Tyre chains are used.

▼ When a tyre pressure decreases
If the TPMS warning light turns on, a tyre
pressure may be low. Inspect the tyre
pressures and adjust them to the correct
inflation pressure.