MTS SWIFT 50 GLP Sensor Heavy Trucks - Manual (Page 77)

SWIFT 50 GLP Sensors Troubleshooting 77
Failed indicator lights after
Shunt Calibration The signal cable is not
connected to the transducer
or it is damaged or the
transducer is damaged. Perform TI2STATUS.
Check that the proper calibration file was
downloaded (the serial number in the report
matches the transducer serial number.
Check the error messages in the report.
During a shunt calibration, the shunt cables
provide the shunt across the individual bridges,
but the outputs that are verified in the TI come
from the output signal cable. Check that the
output signal cable is not damaged and is
securely fastened to both the TI and the
transducer.
Excessive noise on the
signal caused the shunt
tolerance to be exceeded. Electrical Noise: The transducer has power
conditioning, shielded cables, and on-board
amplification to reduce electrical noise.
However, if the TI or transducer are very near a
powerful noise source, some noise can be
picked up with the signal.
Check that the TI electronics are grounded
properly through the power cable to the power
source. If possible, perform the zeroing and
shunt calibration procedure away from the noise
source.
Physical Noise: If the transducer is part of an
assembly that is connected to active hydraulics
or other assemblies that may experience
physical vibrations, these vibrations may be
picked up as inertial forces read by the
transducer. Check that the transducer is not
experiencing dynamic loading or vibrations
during the zero process or shunt calibration.
A temporary fix is to increase the shunt
verification tolerance by changing the setting in
the TI. Note that any temporary fix by
increasing the tolerance may allow a shunt
calibration to pass, when it may be indicative of
a problem that should not be ignored.
The slip ring or road
simulator connector housing
assembly is not transmitting
a signal. The shunt procedure requires the output through
the slip ring or connector housing. Make sure
that the slip ring/connector housing connection
is secure and that no connectors appear to be
damaged. If possible, swap it out with another
slip ring or connector housing to verify that the
slip ring or connector housing component has
not failed or been damaged.
Troubleshooting Guide (part 6 of 11)
Symptom Possible Causes Solution