TractionAir
22
‘Pressure Sensor Fail – Contact Service Agent’
will not display until the next
compare failure.
After an alarm, both PT1 and PT2 pressures will be displayed and updated every
second. This will enable the operator to determine which sensor best matches
a manual pressure gauge reading of the tyre pressure. a) above is then used to
select this sensor to control the tyre pressure until the faulty sensor is replaced
and PT1+PT2 selected.
Pressure Transducer Test
1. Ensure the ECU is turned on
2. Go to the Pressure Cell and open the lid.
3. Using a DC Volt meter measure the Transducer supply voltage between
Terminal 4 (+ve) and Terminal 2. It should be between 8 and 10V. If not
check that the RED wire is tight in Terminal 4 and that all the pins are
correctly inserted in the 10 way ECU connector. Then check the wiring loom
for damage.
4. If the voltage is OK go to the next step.
5. Remove the yellow wire from terminal 5 and connect
a DC Amp meter in series with this wire and terminal 2.
6. If the reading is not between 4 and 20mA.
(milliamps), you will have to replace the
pressure transducer.
Park up
Taps On (handles in line)
Taps Off (handles at 90 °)
When parking up the vehicle overnight or any
other extended time period, it is very important
that
all wheel end axle bridge ball valves are
turned off.
TractionAir can mask small leaks and
punctures that may be present in a single tyre
that left overnight, could result in all tyres losing
pressure and breaking their beads. The ball valves
located on the two brass TA37004 tees are there
primarily to allow quick isolation of a wheel group
in the event of a blown hose etc.
Leave these taps on overnight.
Summary of Contents for TractionAir
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