PREVOST X3-45 2011, Operator'S Manual

Page: 139 / 214

Safety Features and Equipment 133
The telltale panel indicator illuminates for 3
seconds when the ignition switch is turned ON to
check the display operation and the
communication between the display and the
vehicle multiplex system. This confirms the
communication between the TPMS display and
CECM.
Settings Menu
•
Set Wheel ID
•
Learn Wheel ID
This menu allows learning new wheel sensors
ID. The user can learn only one wheel, several
wheels or all wheels of the vehicle. The
sequence automatically jumps to the next wheel
such that a user can initiate all wheels without
having to come back to the display between
each wheel.
The display uses a pressure change as the
criteria to recognize which wheel sensor the
operator wants to get assigned to a given
location. The amount of pressure change
required is established at 2 PSI.
A pressure change of about 3 PSI is needed to
wake up a sensor and then an extra amount of
pressure change of 2 PSI is needed to trigger
the display. The operator has to create a
pressure change by at least 6 PSI and then wait
for the display to recognize the pressure
change. The wait time correspond to the sensor
sampling rate.
When entering the menu, the axle 1, wheel 1 is
selected by default as a starting point for the
learning. The user can select another axle with
+/- , move the cursor to the wheel number with
the right arrow and select another wheel with the
+/- or move the cursor down to the start learning
button.
After the start learning button is selected, the
display stores the first transmission it gets from
each sensor ID into the “initial pressure” for that
sensor ID. Then it compares each subsequent
pressures received for that sensor ID with the
initial one and when the comparison shows a
delta pressure exceeding the defined level
required, this sensor ID is assigned to the
selected tire location.
Once a wheel ID has been assigned, the display
increments the number of Wheels done and it
moves the axle/wheel to the next one in the
sequence waiting for another sensor to come up
with a pressure change. Within one learning
session, the display remembers which sensor
has been assigned and it will not assign it twice.
The sequence increments to the next wheel on
the same axle counting wheels from left to right
and then moves to the next axle counting axles
from front to rear.
The display activates the next wheel parameter
each time a wheel is done. This parameter is
use by the vehicle electronic to activate an
audible signal on the vehicle thus providing a
feedback to the user that he can move to the
next wheel.
The spare Tire can be done by selecting the
axle/wheel “spare” which is internally encoded to
15:1.