Bendix Commercial Vehicle Systems SmarTire Trailer-Link Op Manual - Manual (Page 42)

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7.1.2 Q: The gauge only displays dashes for the trailer tire information;
there is no pressure, temperature, or deviation value.
A: After the wireless link between the tractor SmarTire
® TPMS ECU and
the SmarTire Trailer-Link ™ module has been established and the gauge has
rebooted, trailer tire sensor data will be displayed within five (5) to eight (8)
minutes on the gauge.
To facilitate the quicker display of tire information, use the SmarTire LF Tool
or SmarTire Maintenance Hand tool and initiate each of the tires that have not
reported to the Gauge. On the SmarTire TPMS Maintenance Hand tool, press
the left-most button as you point the tool’s antenna into the tire sidewall above
the valve stem (default sensor location). Remember, that both the SmarTire
LF Tool and SmarTire Maintenance Hand tool are capable of activating the
inner tire on a dual tire assembly from the outboard tire position. For use of
the SmarTire LF Tool, please refer to manual BW2820.
In cases where no transmissions were received from a specific tire, move the
Hand tool five (5) inches in a clockwise or counterclockwise direction and try
again. Should the problem persist, a defective, missing, or misplaced sensor
may need to be diagnosed – see Section 7.3.
Figure 45
Sensor
22-24 inch LF
Field Range
Inboard Tire Outboard Tire
Valve Stem