TM 5-5420-227-24
Status Readouts
Interpretation
VTM Readout
A readout of .8.8.8.8 appears for 1 to 2 seconds each time the power is applied to the VTM. It means
.8.8.8.8
that there is power to the VTM, and that all elements of the readout display are operative.
I
----
A readout of ---- indicates the following:
(1) After power turn on it signifies that the VTM is ready for testing.
(2) During a compression unbalance test it signifies testing is in progress.
(3) During battery condition test it signifies battery may be in discharged state.
A readout of .9.9.9.9 indicates that the VTM is reading a test value beyond the range of its mea-
.9.9.9.9
surement capability. Either (1) the wrong test number is selected, or (2) there is a fault in the
vehicle, (3) during battery condition test, it signifies bas connections, discharged, or bad batteries.
PASS
A PASS or FAIL readout is the result of a test that checks the condition of a component being
FAIL
measured. A PASS/FAIL readout means just that - the component either passes the test or fails the
test.
Prompting Messages
I
Intepretation
VTM Readout
Signal to the technician to release the TEST button during an offset test.
CAL
Numbers are used for prompting messages in several tests. They are as follows: in confidence test 66
66
signals the technican to dial in "99"; in CI acceleration/deceleration power test No. 12, the first
numerical readout signals the technician to shut off fuel.
TA170163
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