Bendix Commercial Vehicle Systems SMARTIRE TPMS OPERATORS MANUAL - Manual (Page 26)

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To check your tire pressure, temperature, and pressure deviation:
1. Starting from the TPMS Ready screen, press the right button once and the display will
show the first axle screen starting at the front of the vehicle with one tire position
highlighted. The pressure, temperature and pressure deviation information displayed is
for the selected tire.
2. To move to the next wheel on the vehicle, press the right button once. The next tire in
sequence will be highlighted and its pressure, temperature and pressure deviation
reading will be displayed. Each time the right button is pushed, the next tire in sequence
will be selected and its information displayed. Pressing the right button when the last tire
on the axle is selected will re-select the first tire on that axle.
3. To move to the next axle on the vehicle, press the left button once. Once again, pressing
the right button will scroll the display to the next tire on that axle. Each time the left button
is pressed the display will show the next axle on the vehicle. When the left button is
pressed from the last axle screen programmed in the display, the first axle will once again
be shown.
4. Repeat steps 1, 2 and 3 until all desired wheel positions and axles have been checked.
5. To exit back to the “TPMS Ready” screen, press the center button once.
5.3 AUDIBLE AND VISUAL ALERTS
Pressure Deviation Alert
The Pressure Deviation Alert is the first indicator of an under-
inflated tire. If a tire deviates 10% from its “proper” inflation
pressure, the driver is alerted to the condition by an indicator light
and an audible alarm (optional). SmarTire
™
calculates a tire’s
“proper” inflation pressure by first mathematically calculating the
amount of pressure that is supposed to be in the tire based on its
operating temperature and its cold inflation pressure setting, and
then comparing this calculated value to the actual, measured
pressure value of the tire. The pressure deviation value that is
displayed is the difference between the actual pressure and the
calculated “correct” pressure. This temperature compensation
calculation enables SmarTire
™
TPMS to provide pressure deviation
values and alerts even when a tire is hot.