Tyre Pressure Monitoring System (Optional); System Calibration - Maserati Quattroporte Automatic Owner's Manual

M139_UM_ing.book Page 47 Friday, September 5, 2008 8:19 AM
Tyre pressure monitoring
system (optional)
The vehicle is equipped with a system
that monitors the tyre pressure by
means of special sensors that are
secured inside the wheel rims, in
position with the inflation valve. These
sensors transmit a signal that is
detected by the aerials fastened on the
car body, behind the gravel guards,
and connected to the ECU.
WARNING: The system can
momentarily experience radio-electric
interference emitted by devices using
similar frequencies.
The ECU processes this information
and, via the CAN line, transmits a series
of tyre pressure data and system
errors, if any, to the on-board
instrument panel.
The signal transmitted by the ECU
activates some ideograms on the
display.
The system is equipped with a specific
wiring that connects the aerials, the
control unit and the calibration button
to the vehicle's electrical system.
The system warns the driver
that there is a drop in tyre
pressure. This warning does
not exempt the driver from
periodically checking the tyres and
from complying with the prescribed
tyre pressure levels.
WARNING: The system stores the tyre
pressures as a reference rate, therefore
tyres must be inflated to the prescribed
pressure.
A

System calibration

After replacing or inflating one or
more tyres, the system must be
calibrated once again.
To calibrate the system, with the key in
the MAR position and the engine off,
keep button A, located on the inside
roof, pressed down for a time ranging
between 4 and 10 seconds.
The system takes a maximum of 20
minutes to complete the calibration
procedure with the vehicle in motion.
A green symbol will appear on the
display together with the message
"Calibration activated".
If the user recalls the information page
showing the pressure levels of each
tyre, dashes "–.–" will be viewed in the
place of the values.

Tyre pressure monitoring system (optional)

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