TM 9-2320-260-20
I
2-20. STE/lCE DESCRIPTION AND OPERATION (Contd)
testing.
(a) Status Readout. A status readout keeps technician 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 four dashes 1.5 seconds later, indicating
that the VTM is ready to be used for testing. The status readout displays are described in Table 2-5.
(b) Prompting Message. A prompting message is a technician action message. It is a signal for
you to do something such as crank engine. For example, UEH tells you to enter the vehicle identification
number into VTM. After technical action is performed, test will automatically continue. Prompting
messages are listed in Table 2-6.
(c) Numerical Readout. A numerical readout is the measured value in units of measurement
being made. For example, if you are measuring 0-45 volts DC, 12.7 is volts DC. If you are measuring
0-25 psig pressure, 12.7 is psig. Units for each test are listed on the flip card.
(d) Error Readout. E001 is a typical error readout. There are 14 different error readouts.
All of these error readouts start with E. An error readout is a warning that you forgot to connect the
transducer, selected a wrong test number, failed to start engine, etc. All error messages mean you must
correct problem before continuing testing. Error messages are described in Table 2-7. If an error message
does not go away after corrective action, refer to TM 9-4910-571-12&P.
faulty VTM during confidence test.
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