TM-9-2320-279-20-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3
TM-9-2320-279-20-1 - Page 360 of 985
TM 9-2320-279-20-1
STE/ICE Instructions (Cent)
2-16.
SIMPLIFI
INTROD1
:D TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINES (STE/lCE)
ICTION (coNT)e
TA35683
(2)
Prompting Message.
A prompting message is an operator action message. It is a signal to do
something, such as crank the engine. UEH, for example, is the prompt to enter the vehicle type
identification number into the VTM. After the o~erator action is ~erformed, the test will automatically
continue. Prompting messages are listed in ‘lhble- 2-13.
I
CzIl
L
TA35663
(3)
Numerical Readout.
A numerical readout is the measured value in units of the measurement
being made. For example, if measuring O-45 volts DC, 12.7 is volts DC. If measuring O-25 PSIG pressure,
12.7 is PSIG. The units for each test are listed on the flip cards. The numbers displayed on the VTM are
always positive unless there is a minus shown to make ~hem negative.
. .
Table 2-13. Prompting
Messages
o
*
VTM Readout
UEH
CYL
GO
CIP
OFF
CAL
66
Interpretation
I
Signal to operator to enter vehicle type identification number (VID) on the test
SELECT switches. Vehicle ID numbers are found under TEST DATA on the flip
cards, on the vehicle test cards, or GO1 of the appropriate GO Chain in this manual.
M977 series vehicle VID is 18.
Signal to operator to enter number of CYLinders or cylinder pairs on the TEST
SELECT switches. These numbers are found under TEST DATA on the flip cards.
I
Signal to operator to crank engine in compression balance or first peak tests.
Signal to operator to apply full throttle in a CI power test.
Signal to operator to stop cranking in compression balance test or to release the
accelerator in the CI power test.
Signal to the operator to release the TEST button during an offset test.
Numbers are used for prompting messages in several tests. They are as follows; in
confidence test 66, signals the operator to dial in 99. In CI acceleratiorddeceleration
power test No. 12, the first numerical readout signal~ the operator to shut off fuel.
2-280
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