27
4.3
OPERATING INSTRUCTIONS
The system consists of one electronic unit, so called
electronic control unit, which receives wireless
information from wheel modules. Wheel modules are
permanently connected by hoses to tire valves. Pressure
information is processed by algorithms stored in control
unit.
Data are relayed by CAN bus to display. Display unit
consists of one display, two indicators, one buzzer and
two buttons.
Warnings of different levels are signalised; importance
could be recognised by colour of indicator light and audio
signal:
–
Red light (STOP) and 1 minute long audio signal
indicates serious defect; the vehicle must be stopped
immediately (possible threat to lives and vehicle).
–
Yellow light (turtle) and 10 minutes long audio signal
indicates smaller defect; the vehicle should be slowed
down and lower pressure adjusted.
Defects found by IVTM are stored in electronic memory
for diagnostic purposes.
4.3.1 Display operation
Cable harness is connected to display by 4-pole plug. It
is powered only if the ignition is on.
After the ignition is switched on, internal check procedure
is performed, when all internal functions are tested: all
symbols are displayed for one second, all pilot lights and
audio signals are switched on; this procedure is repeated
twice.
If the tire pressures are not exceeding specified values,
following data are displayed after initialisation:
Two buttons on front panel are used to control different
functions.
Left button
with symbol of manometer displays vehicle
tire pressure.
Right button
with question mark symbol shows detected
defects. If pressed longer, the error messages are
deleted (after correction of tire pressure).
4.4
DIFFERENT VALUES ON DISPLAY
4.4.1. Normal values
After initialisation the top view of vehicle is displayed
(driving direction upward) for 12 seconds. For example
4x2 truck is shown like:
If the trailer with IVTM system is connected to motor
vehicle, both vehicles are shown alternatively in one
second intervals for 12 seconds.
Fig. 1
h
mn
km
psi
bar
psi
bar
psi
bar
IVTM
+
Fig. 3
IVTM
Diagnostics
IVTM
4.