10
on the instrument panel. The system is made up of an ECU placed inside the cab that
receives radio frequency pressure and temperature signals from four sensors installed
inside the tires.
When the vehicle is running, the sensors transmit their signals every 20-30 seconds
approximately. In the event of a significant pressure variation, transmission interval is
shortened to 8-10 seconds.
When the vehicle is at standstill, transmission interval may vary between 10 and 40
minutes, depending on the type of sensor installed.
11. TPMS indicator lights
Outlined below are the most significant TPMS indicator lights.
Depending on the type of vehicle, this light may
indicate one of the following conditions:
•
Turns on to indicate that the pressure of
one or more tires is above or below the
specified rated pressure.
•
Turns on to indicate a TPMS malfunction
(for instance, when one of the sensors is
malfunctioning).
•
Light operation may vary to differentiate
indications when tire pressure has
crossed the warning or alert thresholds.
Tire location indicator
This light indicates the location of the under- or
overinflated tire.
The light may be associated with a display
message.
Display messages
“Check tire pressure
”
Audio Alarms
Audio alarm for wrong tire pressure or TPMS
malfunction
