Bendix Commercial Vehicle Systems SMARTIRE TPMS OPERATORS MANUAL - Manual (Page 27)

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The default setting triggers the pressure deviation alert when a tire is 10% under- or over-inflated.
This setting can be customized by the user. The alert can also be customized to be a fixed
pressure alert rather than a temperature compensated alert. The units of measure can also be
customized to PSI, bar, or kPa. The acronym for the Pressure Deviation Alert is FAL for First Alert
Level.
Critical Low Pressure Alert
The Critical Low Pressure Alert is the second indication of an under-
inflated tire. It alerts the driver when a tire’s pressure falls 20% below
the programmed Cold Inflation Pressure (CIP) value. This visual and
audible (optional) alert is intended to alert the driver to a critical tire
condition in order for them to take immediate precautions.
Unlike the Pressure Deviation Alert, the default setting for the Critical
Low Pressure Alert does not include the temperature compensation
calculation. As such, if a tire’s pressure falls below the default
setting, the tire is critically under-inflated and should be addressed
immediately.
Like the Pressure Deviation Alert, the default settings for the Critical
Low Pressure Alert can be customized by the user. The alert can also be set to be temperature
compensated. The acronym for the Critical Low Pressure Alert is SAL for Second Alert Level.
High Temperature Alert
The High Temperature Alert warns the driver when a tire’s
temperature exceeds 195°F (90°C). High tire temperatures are
typically caused by under-inflation and the SmarTire
™
system will
usually provide a Pressure Deviation Alert and a Critical Low
Pressure Alert well in advance of a High Temperature Alert. If
triggered on its own, the High Temperature Alert can be an indication
of an alternative problem, such as a dragging brake or a bearing
failure. Like the other two alerts, the default High Temperature Alert
setting can be customized by the user. The acronym for the high
temperature alert is Over Temp.
Sensor Diagnostic Trouble Code Alert
A Sensor Diagnostic Trouble Code Alert will be issued for any
programmed sensor that has not reported its data to the Gateway
receiver within 35 minutes of the last transmission. Sensor
Diagnostic Trouble Code Alerts are self-clearing as soon as data is
received from the given sensor. Prolonged Sensor Diagnostic
Trouble Codes can indicate damaged or missing sensors and should
be examined further.