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Controls and Instruments

4-18

The  TPMS  display  is  also  configured  with
several  other  parameters,  including  threshold
levels for the alarms.

The TPMS display power supply turns OFF
when the ignition key is switched OFF.

Operation

The system will monitor all vehicle tires (6 or 8)
plus the spare tire when a spare is supplied.

NOTE

Some vehicle models do not come with a spare
tire.

There  are  two  configurations  of  vehicle  tires  to
be  supported.  One  configuration  (the  most
common)  consists  of  8  tires  total:  two  tires  on
the  front  axle,  4  tires  on  the  drive  axle  and  2
tires on tag axle. All screen figures shown in this
document  relates  to  this  vehicle  configuration.
The  second  tire  configuration  consist  of  6  tires
total: 2 tires on the front axle, 2 tires on the drive
axle  (super  single  tires)  and  2  tires  on  the  tag
axle.  The  vehicle  tire  configuration  is  selected
with  a  parameter  (Refer  to  chapter  «

SAFETY

FEATURES

AND

EQUIPMENT

for

information).  When  the  display  is  configured  for
6 tires, the drive axle tires appears as one large
tire  on  both  side  instead  of  twin  tires  as
illustrated  in  this  document  and  there  is  one
reading  appearing  on  each  side  instead  of  two
as illustrated in this document.

Start-up

When  turning  the  ignition  switch  to  ON,  the
screen  shown  below  appears  on  the  TPMS
Display.  Dash  lines  are  displayed  meaning  that
no  pressure  data  have  been  received  by  the
display.

- -

- - - -

- -

SPARE TIRE: - -

PRESSURE DEVIATIONS

TARGET PRESSURES
GAUGE PRESSURES

- -

- - - -

- -

-1 - -

SPARE TIRE: - -

PRESSURE DEVIATIONS

TARGET PRESSURES
GAUGE PRESSURES

PSI

As  illustrated,  the  pressure  readings  will  appear
replacing  the  dash  lines  as  the  TPMS  display
starts  to  receive  pressure  data  from  the  TPMS
receiver. It can take 1 minute to get all pressure
readings updated since the sensors transmit at a
one minute interval.

The user can flip through the menus.

Pre-Trip Check

When  one  of  the  preconditions  defined  to  start
the  pre-trip  check  is  met,  the  TPMS  display
enters  into  a  pre-trip  check  routine  and  the
screen shown below appears. The preconditions
to  initiate  the  pre-trip  are:  Park  brake  removed
Or  No  activity  on  the  display  menu  keys  for  a
defined time (Key pressed  timeout). After a pre-
trip, the display is in a “drive” mode with bottom
menu replaced  by the alarm status. The display
remains  in  this  mode  until  one  of  the  following
occurs:  A  menu  key  is  touched  while  the  park
brake  is  applied,  or  the  park  brake  does  a
transition from released to park brake applied.

- -

- - - -

- -

-1 - -

SPARE TIRE: - -

PRE-TRIP CHECK IN PROGRESS

PSI

During the pre-trip check, the pressure readings
for the different wheels become all available.

The  pre-trip  check  ends,  either  when  the
pressure  readings  have  been  received  for  all
running  wheels  or  the  pre-trip  check  maximum
time  has  elapsed.  It  was  selected  to  provide
sufficient  time  for  all  wheel  sensors  to  wake-up
and send a first reading.

The  pre-trip  check  is  aborted  and  the  bottom
menu  reappears  if  the  park  brake  was  active
and the user press one of the menu keys.

Upon completion of the pre-trip check, the
TPMS display will come up with one of the
screens shown hereafter: