Bendix Commercial Vehicle Systems SmarTire Trailer-Link Op Manual - Manual (Page 8)

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1.3 How Does The SmarTire Trailer-
Link ™ TPMS System Work?
Full SmarTire ® TPMS System Overview
1. The SmarTire Trailer-Link ™ ECU creates a wireless bubble around the
trailer, allowing it to sense and transfer trailer tire data to a SmarTire ® -
equipped tractor.
2. Tire sensors mounted on each trailer wheel measure tire pressure and
temperature every twelve (12) seconds and wirelessly transmit tire data
every three to five minutes.
3. Industrially-designed for the rugged requirements of a commercial trailer
chassis, the SmarTire Trailer-Link ECU can monitor up to eight (8) wheel
positions when linked with a tractor with SmarTire TPMS, and more
when applied as a stand alone trailer TPMS. The total number of tires
monitored on both the tractor and trailer cannot exceed twenty.
4. When the tractor connects up to the trailer, the wireless transmissions of
the SmarTire Trailer-Link ECU will link up to the SmarTire tractor ECU.
Once the link up is achieved, the tractor SmarTire display will restart and
add the additional trailer axles to the tractor display. The new axles will
be indicated as trailer axles by showing a “T” in front of the axle number,
e.g. T1, T2, etc.
5. Real-time tire pressure and temperature information is available to the
driver on demand via the SmarTire TPMS tractor display, if equipped.
An easy-to-read and simple-to-use interactive gauge that provides real-
time tire status information, the SmarTire display will alert the driver to a
low pressure or high temperature trailer tire condition before it becomes
dangerous.
6. Trailer tires can also be monitored using the system as a stand-alone
application connected to an optional trailer-mounted alert lamp.
7. The SmarTire maintenance hand tool is used to check trailer tire
pressures and temperatures during maintenance inspections. It can
also be connected directly to the SmarTire Trailer-Link ECU to set the
trailer axle Cold Inflation Parameters (CIPs) and to configure trailer tire
sensor IDs. The SmarTire maintenance hand tool improves inflation
accuracy and reduces diagnostic time in order to keep every tire rolling
cost-effectively. Please refer to Section 3.2 of this manual or BW2809
for detailed information on programming the SmarTire Trailer-Link ECU
with the maintenance hand tool.