TM-9-2320-283-20-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3
DECEMBER 1983
TM-9-2320-283-20-1 - Page 458 of 926
TM 9-2320-283-20-1
STE/ICE TROUBLESHOOTING.
2-16.
STE/ICE DESCRIPTION AND OPERATION (Continued).
1.
Status Readout.
This type of readout keeps the mechanic informed of what is happening such as
power applied, failed test, etc.
2.
Numerical Readout.
This type of readout is the measured value in units
of the
measurement
being made.
If you
are measuring
on the 0-45
dc range, the number 24 on the display indicates 24-volts.
3.
Error Readout.
This type of readout indicates that the
wrong test number was selected, the
transducer is not connected, or the VTM is faulty.
(e)
Flip Cards.
The flip cards list the 2-digit test number system for selecting the various tests.
The cards
also summarize the test and
operating instructions contained herein.
(f)
Power/DCA Connector J1.
Connector J1 connects the VTM to either the M915A1 truck diagnostic
connector using the DCA cable or the truck batteries using the power cable.
Operating power and signals from installed
transducers are supplied to the VTM through the DCA cable.
(g)
Transducer Cable Connectors J2 and J3.
Connector J2 or J3 connects the VTM to any
transducer in
the transducer kit.
Operating power is supplied to the transducer, and signals from the transducers are supplied to the
VTM through the cable.
Connectors J2 and J3 are identical and can be interchanged with each other or used in
combination.
(h)
Test Probe Cable Connector J4.
Connector J4 connects test leads to the VTM when doing manual or
general purpose voltage and resistance tests.
(3)
Readouts.
The following paragraphs describe the different types of readout that can occur during testing.
(a)
Status Readout.
A status readout keeps the mechanic informed of what is happening.
For example,
.8.8.8.8 is displayed each time the power switch is pushed on.
It means that power is applied and that all
elements of the display are operative.
It changes to ---- 1-1/2 seconds later, indicating that the VTM
TA 236967
2-333
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