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TMS-4 OPERATION
Air Leak Detection
The TMS-4 system can warn of air leaks in tyres.
Enabled by default in the software, Air Leak Detection
can use sensor logic, or be manually user-defined.
Sensor logic relies on the sensor flagging an air leak,
then signals a DTC based on that flag.
Users can also define their own pressure drop values
in the TMS-4 setup menu. If a pressure drop of that
value (or greater) occurs over a 5 second period then
the ECU flags an air leak.
Over / Under Pressure Detection
A DTC can be flagged when the air pressure readings
fall below, or rise above, the user-defined pressure
values for the front and rear pairs of tyres.
Users can set maximum and minimum pressure values
for pairs of tyres per-axle in the TMS-4 setup menu.
A DTC is triggered if the pressure drops or rises, to
under or over the pre-set values for 3 seconds or more.
Both internal and external sensors have a working
pressure range of 0-116 psi (0-800kpa).
Sensor Signal Loss Detection
A DTC triggers if signal loss is detected from any active
sensors. Signal loss can only be detected when sensors
are known to be awake so this requires vehicle speed
to be enabled, as sensors activate during pressure
change or when tyres are moving.
Diagnostic Trouble Codes
The TMS-4 can trigger several optional DTCs, including:
• Pressure High / Pressure Low
• Temperature High
• Air Leak Detected
• Sensor Battery Voltage Low
• Sensor Signal Loss
DTCs can be enabled within the TMS-4 setup menu. If a
sensor is not assigned to a tyre, it cannot trigger a DTC.
DTCs are referenced to the wheel the sensor is
assigned to. For example, if Sensor 3 (RL) is assigned
to the front left tyre and detects pressure is too low
the “Front Left Tyre Pressure Low” DTC will trigger.
Over Temperature Alert
A DTC is flagged if any sensor is at or above the user
defined maximum temperature entered.
Summary of Contents for TMS-4
Page 1: ...1 TMS 4 QUICK START GUIDE ...
